Relevant bibliographies by topics / Turbine blades

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Turbine blades'

Author: Grafiati
Published: 4 June 2021
Last updated: 31 January 2023

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Journal articles on the topic "Turbine blades"

1

Tonadi, Een. "ANALISIS PENGARUH JUMLAH SUDU TERHADAP EFISIENSI TURBIN PELTON DENGAN TEKANAN KONSTAN." Teknosia 1, no. 1 (June 3, 2021): 36–42. http://dx.doi.org/10.33369/teknosia.v1i1.15390.

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One of the renewable energy sources that can be used for electricity generation is the Pelton turbine. The purpose of this study was to determine the effect of the number of blades on the efficiency of a Pelton turbine with constant pressure. This research was conducted at the Unihaz mechanical engineering laboratory by varying the number of blades, namely 9 blade turbines and 12 blades. Tests were carried out by giving load gradually to the turbine until the turbine rotor rotation stopped rotating. The results show that in the turbine test with blades 9 the maximum rotation achieved is 698.2 rpm and the maximum rotor rotation is 714.5 rpm at blade 12. Likewise, the torque coefficient and power coefficient achieved by the turbine with 12 are greater when compared to the 9 blades. Meanwhile, the efficiency that can be achieved by turbines with 9 blades is 71% and at 12 blades is 79%. From this it can be concluded that the number of blades affects the rotation, torque coefficient, power coefficient and efficiency of the Pelton turbine with constant pressure.
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Jamal, Jamal. "Pengaruh Jumlah Sudu Terhadap Kinerja Turbin Savonius." INTEK: Jurnal Penelitian 6, no. 1 (May 25, 2019): 64. http://dx.doi.org/10.31963/intek.v6i1.1127.

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Savonius wind turbines are wind turbines that canoperate at low wind speeds, this type of turbine is very suitable tobe used in several places in Indonesia. The research aims toimprove the performance of the Savonius wind turbine withvariations in the number of turbine blades as well as variations inthe velocity of wind speed. The research method wasexperimental where wind turbine testing was carried out withvariations in the number of turbine blades with number of 2, 3and 4 blades, other variations carried out were wind speed at 3.5;4,5; 5.5 and 6.5 m/s. The study results show that the 2-bladeturbine produces greater rotation, but the torque moment islower than the 3 and 4 blade turbines, this can be seen in the lowefficiency of the 2 blade turbine at low wind speeds with highloading. At 3.5 m / s wind turbines 2 blade turbines haveefficiency that tends to be the same as 3 and 4 blade turbines upto 0.5 N but at loads of 0.6 - 1.2 N 2 blade turbines have lowerefficiency, while at wind speeds of 4.5 - 6.5 m / s 2 blade turbineshave greater efficiency than turbines 3 and 4 blades up to a loadof 1.2 N but if the load is added then the efficiency of 2-bladeturbines can be smaller than efficiency 3 and 4-blade.
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Cao, Kathy, Kelsey Shaler, and Nick Johnson. "Comparing wind turbine aeroelastic response predictions for turbines with increasingly flexible blades." Journal of Physics: Conference Series 2265, no. 3 (May 1, 2022): 032025. http://dx.doi.org/10.1088/1742-6596/2265/3/032025.

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Abstract Highly flexible blades are becoming more prevalent designs as a potential solution to the transportation challenges associated with large-scale wind turbine rotors. However, there is currently no quantitative definition of “highly flexible” blades. To further develop turbines with highly flexible blades, a precise definition of the term and accurate simulations of turbines with such blades are required. Assumptions made in the traditional aerodynamic model, Blade Element Momentum (BEM) theory, are violated in turbines with flexible blades. However, Free Vortex Wake (FVW) methods can more accurately model these turbine designs. Though more computationally expensive than BEM, FVW methods are still computationally tractable for use in iterative turbine design. The purpose of this work was to determine the blade flexibility at which BEM and FVW methods begin to produce diverging aeroelastic response results. This was accomplished by simulating the BAR-DRC reference turbine with increasingly flexible blades in a range of steady, uniform inflow conditions using OpenFAST, the National Renewable Energy Laboratory’s physics-based turbine engineering tool. Blade-tip deflections confirmed that BEM and FVW results diverge as blade flexibility increases. For the 212 m rotor diameter turbine used in this study, the two methods largely agreed for smaller blade deflections. But their results differed by an average of 5% when the out-of-plane blade-tip deflections exceeded 5% of the blade length and in-plane blade-tip deflections exceeded 1.25% of the blade length, with percent differences approaching 25% at the largest deflections.
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Xu, Zhi Qiang, and Jian Huang. "Research on Wind Turbine Blade Loads and Dynamics Factors." Advanced Materials Research 1014 (July 2014): 124–27. http://dx.doi.org/10.4028/www.scientific.net/amr.1014.124.

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Wind turbines consists of three key parts, namely, wind wheels (including blades, hub, etc.), cabin (including gearboxes, motors, controls, etc.) and the tower and Foundation. Wind turbine wheel is the most important part ,which is made up of blades and hubs. Blade has a good aerodynamic shape, which will produce aerodynamic in the airflow rotation, converting wind energy into mechanical energy, and then, driving the generator into electrical energy by gearbox pace. Wind turbine operates in the natural environment, their load wind turbine blades are more complex. Therefore load calculations and strength analysis for wind turbine design is very important. Wind turbine blades are core components of wind turbines, so understanding of their loads and dynamics by which the load on the wind turbine blade design is of great significance.
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Mwanyika, Hegespo H., Yusufu AC Jande, and Thomas Kivevele. "Design and Performance Analysis of Composite Airfoil Wind Turbine Blade." Tanzania Journal of Science 47, no. 5 (December 1, 2021): 1701–15. http://dx.doi.org/10.4314/tjs.v47i5.18.

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Abstract Small horizontal axis wind turbine rotors with composite airfoil rotor blades were designed and investigated in the present study in order to improve its performance in low wind speed and low Reynolds number (Re) conditions for standalone system. The geometrical and aerodynamic nature of a single airfoil small horizontal axis wind turbine blade curtails efficient energy harnessing of the rotor blade. The use of composite airfoil rotor blade improves energy production but imposes uncertainty in determining an optimal design angle of attack and the off design aerodynamic behaviour of the rotor. This research investigated the effects of two airfoils used at different sections in a composite blade and determined the blade’s optimal design angle of attack for maximum power generation. The wind turbine rotor blades were designed using blade element momentum (BEM) method and modelled by SolidWorks software. The SG6042 and SG6043 airfoils were used for the composite airfoil blades. Five wind turbines were designed with rotor blades of design angles of attack from 3° to 7°. The five wind turbine blades were simulated in computational fluid dynamics to determine the optimal design angle of attack. The composite airfoil wind turbine blade showed improved performance, whereas, the wind power generated ranged from 4966 W to 5258 W and rotor power coefficients ranged from 0.443 to 0.457. The blade with design angle of attack of 6° showed highest performance. Keywords: composite airfoil, lift-to-drag ratio, pressure coefficient, Reynolds number, design angle of attack.
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Buchner, Abel-John, Julio Soria, Damon Honnery, and Alexander J. Smits. "Dynamic stall in vertical axis wind turbines: scaling and topological considerations." Journal of Fluid Mechanics 841 (February 27, 2018): 746–66. http://dx.doi.org/10.1017/jfm.2018.112.

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Vertical axis wind turbine blades are subject to rapid, cyclical variations in angle of attack and relative airspeed which can induce dynamic stall. This phenomenon poses an obstacle to the greater implementation of vertical axis wind turbines because dynamic stall can reduce turbine efficiency and induce structural vibrations and noise. This study seeks to provide a more comprehensive description of dynamic stall in vertical axis wind turbines, with an emphasis on understanding its parametric dependence and scaling behaviour. This problem is of practical relevance to vertical axis wind turbine design but the inherent coupling of the pitching and velocity scales in the blade kinematics makes this problem of more broad fundamental interest as well. Experiments are performed using particle image velocimetry in the vicinity of the blades of a straight-bladed gyromill-type vertical axis wind turbine at blade Reynolds numbers of between 50 000 and 140 000, tip speed ratios between $\unicode[STIX]{x1D706}=1$ to $\unicode[STIX]{x1D706}=5$, and dimensionless pitch rates of $0.10\leqslant K_{c}\leqslant 0.20$. The effect of these factors on the evolution, strength and timing of vortex shedding from the turbine blades is determined. It is found that tip speed ratio alone is insufficient to describe the circulation production and vortex shedding behaviour from vertical axis wind turbine blades, and a scaling incorporating the dimensionless pitch rate is proposed.
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Boedi, Silvy Dollorossa, Josephine Sundah, Meidy Kawulur, and Franklin Bawano. "Design and Construction of Kinetic Turbine External Hinged Blade as A Picohydro Scale Power Plant." International Journal of Innovative Technology and Exploring Engineering 12, no. 1 (December 30, 2022): 43–47. http://dx.doi.org/10.35940/ijitee.a9367.1212122.

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The problem of energy shortage is still a global problem which is especially felt in developing countries whose residents live in villages, which still require the development of more efficient energy sources. Limited fossil fuels make water energy the best energy option. The problem of meeting the availability of electricity in rural areas by utilizing water energy as new and renewable energy is a long-term goal in this research. The current research on kinetic turbines is a combination of two types of waterwheels, which have a vertical axis (overshot and swell turbines). The vertical shaft is made so that the generator is easier to install and all the blades get a boost in the flow of water. Most water turbines have fixed blades. In this research, the target of the novelty is a kinetic turbine with a vertical shaft which has a hinged blade. Hinged blades are blades that can move when the flow of water hits the blades, so that on one side of the turbine it will reduce the negative torque and on the other hand it will increase the rotation of the turbine. The results of the research that became the target, namely, obtained a turbine design that has more optimal turbine power and efficiency, compared to a turbine that has a fixed blade, so that this externally hinged blade kinetic turbine can contribute to the provision of rural electrical energy. This research method is an experiment by doing independent variations on the number of blades, and blade 10 has an optimum power value of 59.01 Watt.
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Winarto, Eko Wismo, Sugiyanto Sugiyanto, Soeadgihardo Siswantoro, and Isworo Djati. "Turbin Hibrid Bi-Directional Sebagai Pemanen Energi pada Thermoacoustic Engine." Jurnal Rekayasa Mesin 12, no. 1 (May 31, 2021): 19. http://dx.doi.org/10.21776/ub.jrm.2021.012.01.3.

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Bi-directional turbines that are commonly applied to convert wave energy into motion energy are the types of Impulse turbines and Wells turbines. Both types of turbines each have advantages and disadvantages. In this research, hybrid turbine type is designed and made to bridge the weaknesses in impulse turbine and turbine wells. Hybrid turbines are made by placing impulse turbines on the outside while turbine wells placed on the inside. In this research, the variation of hybrid bi-directional turbine design aims to find out the most optimal design of this turbine type. Six variations were carried out including a hub to tip ratio of 0.5 with 4 and 5 Wells blades, a hub to tip ratio of 0.6 with 4 and 5 Wells blades, and a hub to tip ratio of 0.7 with 4 and 5 Wells blades. From the test results on thermoacoustic engine media, based on the hub to tip ratio, the most optimal hub to tip ratio is in the order of 0.7 then 0.6, and 0.5. Whereas based on the number of Wells blade, obtained the number of Wells blade 5 is more optimal than the number of Wells blade 4.
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Chen, Xiao Dong, Mei Ling Kuang, and Ya Ming Jiang. "Study of the Textile Composite Adaptive Blade of Small Wind Turbine." Advanced Materials Research 332-334 (September 2011): 828–32. http://dx.doi.org/10.4028/www.scientific.net/amr.332-334.828.

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This paper is mainly to design the small wind turbine blades to make the wind turbines have automatic braking ability. This study has two main aspects, including choosing the reinforced materials and designing the structure of the blades. According to the fiber hybrid principle, carbon fibers are employed in the main stress area of the blades and other area using glass fiber. At the same time, Aramid fibers are mixed in every area of the blade in order to enhance the tenacity of the blade. The other work is designing the structure of the blade with big main body and small abdomen which twists easily. At the designed wind speed, the power output reaches its rated capacity. Above this wind speed, turbine blades twist to adapt to wind speed and make the rotor solidity of wind turbine declined. While the wind speed changes and becomes small, the torsion of wind turbines’ blades turns back. Thus the wind turbines’ rotor solidity becomes greater and power output increases. So at a certain speed ( 36m/s), the wind turbine can adjusts itself to control the power output keeps on a certain level. And then it brakes by itself.
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Matsui, Takuto, Kazuo Yamamoto, and Jun Ogata. "Study on Improvement of Lightning Damage Detection Model for Wind Turbine Blade." Machines 10, no. 1 (December 22, 2021): 9. http://dx.doi.org/10.3390/machines10010009.

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There have been many reports of damage to wind turbine blades caused by lightning strikes in Japan. In some of these cases, the blades struck by lightning continue to rotate, causing more serious secondary damage. To prevent such accidents, it is a requirement that a lightning detection system is installed on the wind turbine in areas where winter lightning occurs in Japan. This immediately stops the wind turbine if the system detects a lightning strike. Normally, these wind turbines are restarted after confirming soundness of the blade through visual inspection. However, it is often difficult to confirm the soundness of the blade visually for reasons such as bad weather. This process prolongs the time taken to restart, and it is one of the causes that reduces the availability of the wind turbines. In this research, we constructed a damage detection model for wind turbine blades using machine learning based on SCADA system data and, thereby, considered whether the technology automatically confirms the soundness of wind turbine blades.
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Dissertations / Theses on the topic "Turbine blades"

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Hart, M. "Boundary layers on turbine blades." Thesis, University of Cambridge, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.305764.

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Ireland, Peter. "Internal cooling of turbine blades." Thesis, University of Oxford, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235870.

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Moore, Timothy David. "Automated inspection of turbine blades." Thesis, University of Manchester, 2003. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.762419.

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Höyland, Jörg. "Challenges for large wind turbine blades." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for produktutvikling og materialer, 2010. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-13545.

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With global climate problems receiving increasingly international political attention,most European nations are looking for sources of renewable energy. Wind turbines area promising source of renewable energy and their numbers have steadily increasedsince the introduction of the modern wind turbine in the 1970s. The largest units todayhave a rated power of 7 MW and blades ranging up to 62.5 m in length. Offshore windturbines have access to stronger winds with less turbulence, thereby increasing theenergy output of each unit. Offshore turbines will also have a lesser environmentalimpact than onshore turbines. It is believed that the development of offshore wind turbineswill encourage the development of even longer blades. The main spar geometry of a 100 m wind turbine blade was established in order to evaluatehow the use of carbon and glass fiber composites would affect the design. A hybridsolution using UD carbon fiber for global stiffness and ±45° glass fiber plies for bucklingresistance was also developed. The ultimate loads were calculated for blades with pitchcontrol and blades experiencing failure of pitch control during the 1-year and 50-yearextreme gust. The DNV-OS-J102 standard for wind turbines was used in the calculationof safety factors for both loads and material strength criteria. The distribution of ±45°anti-buckling plies by buckling analysis is extremely time consuming and therefore aprogram for automatic ply distribution was developed. The Matlab program interactedwith the FEM software Abaqus, defining input files and extracting results, and proved tobe highly efficient. The results from the FEM analyses were combined with a simple costmodel in order to evaluate both the weight and cost of the different spar solutions. Important weight reductions can be obtained by optimizing the performance of the composite laminate in the spar. Several sub-models of the 100 m spar were created withthe aim of optimizing the spar’s buckling performance. The angle and distribution ofboth the ±45° and UD plies were systematically altered in order to increase the bucklingload. The introduction of ply homogenization and core material in the flange was alsoevaluated and yielded the largest increases of buckling load. The results from the optimizedsub-models were implemented in a 100 m spar and found to decrease theamount of ±45° plies by 50 %. A 6 m scaled main spar of glass fiber composite was produced by resin infusion. Thespar was tested in a 4-point bending test and designed to fail by buckling of the topflange. In order to control the location of the buckling failure, an artificial imperfectionwas introduced in the middle of the top flange during manufacturing. The imperfectionis representative for imperfections found during manufacturing of wind turbine spars. Inaddition to measuring force and global deflection, 25 strain gages were installed tomonitor the spar. Finally, a FEM analysis of the 6 m spar was developed and correlated with the experimentalresults. By implementing the imperfection in the compression spar and the useof non-linear analysis, the strain patterns from the test results were successfully reproduced
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Pearce, Robert. "Internal cooling for HP turbine blades." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:832038c9-e934-413d-bbb5-336ab4775055.

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Modern gas turbine engines run at extremely high temperatures which require the high pressure turbine blades to be extensively cooled in order to reach life requirements. This must be done using the minimum amount of coolant in order to reduce the negative impacts on the cycle efficiency. In the design process the cooling configuration and stress distribution must be carefully considered before verification of the design is conducted. Improvements to all three of these blade design areas are presented in this thesis which investigates internal cooling systems in the form of ribbed, radial passages and leading edge impingement systems. The effect of rotation on the heat transfer distribution in ribbed radial passages is investigated. An engine representative triple-pass serpentine passage, typical of a gas turbine mid-chord HP blade passage, is simulated using common industrial RANS CFD methodology with the results compared to those from the RHTR, a rotating experimental facility. The simulations are found to perform well under stationary conditions with the rotational cases proving more challenging. Further study and simulations of radial passages are undertaken in order to understand the salient flow and heat transfer features found, namely the inlet velocity profile and rib orientation relative to the mainstream flow. A consistent rib direction gives improved heat transfer characteristics whilst careful design of inlet conditions could give an optimised heat transfer distribution. The effect of rotation on the heat transfer distribution in leading edge impingement systems is investigated. As for the radial passages, RANS CFD simulations are compared and validated against experimental data from a rotating heat transfer rig. The simulations provide accurate average heat transfer levels under stationary and rotating conditions. The full target surface heat transfer in an engine realistic leading edge impingement system is investigated. Experimental data is compared to RANS CFD simulations. Experimental results are in line with previous studies and the simulations provide reasonable heat transfer predictions. A new method of combined thermal and mechanical analysis is presented and validated for a leading edge impingement system. Conjugate CFD simulations are used to provide a metal temperature distribution for a mechanical analysis. The effect of changes to the geometry and temperature profile on stress levels are studied and methods to improve blade stress levels are presented. The thermal FEA model is used to quantify the effect of HTC alterations on different surfaces within a leading edge impingement system, in terms of both temperature and stress distributions. These are then used to provide improved target HTC distributions in order to increase blade life. A new method using Gaussian process regression for thermal matching is presented and validated for a leading edge impingement case. A simplified model is matched to a full conjugate CFD solution to test the method's quality and reliability. It is then applied to two real engine blades and matched to data from thermal paint tests. The matches obtained are very close, well within experimental accuracy levels, and offer consistency and speed improvements over current methodologies.
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Nowak, William J. "Fatigue stress analysis of turbine blades /." Online version of thesis, 2007. http://hdl.handle.net/1850/5467.

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Pitchford, Corey. "Impedance-Based Structural Health Monitoring of Wind Turbine Blades." Thesis, Virginia Tech, 2007. http://hdl.handle.net/10919/34946.

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Wind power is a fast-growing source of non-polluting, renewable energy with vast potential. However, current wind technology must be improved before the potential of wind power can be fully realized. One of the key components in improving wind turbines is their blades. Blade failure is very costly because blade failure can damage other blades, the wind turbine itself, and possibly other wind turbines. A successful structural health monitoring (SHM) system incorporated into wind turbines could extend blade life and allow for less conservative designs. Impedance-based SHM is a method which has shown promise on a wide variety of structures. The technique utilizes small piezoceramic (PZT) patches attached to a structure as self-sensing actuators to both excite the structure with high-frequency excitations, and monitor any changes in structural mechanical impedance. By monitoring the electrical impedance of the PZT, assessments can be made about the integrity of the mechanical structure. Recent advances in hardware systems with onboard computing, including actuation and sensing, computational algorithms, and wireless telemetry, have improved the accessibility of the impedance method for in-field measurements. The feasibility of implementing impedance-based SHM on wind turbine blades is investigated in this work. Experimentation was performed to determine the capability of the method to detect damage on blades. First, tests were run to detect both indirect and actual forms of damage on a section of an actual wind turbine blade provided by Sandia National Laboratories. Additional tests were run on the same blade section using a high-frequency response function method of SHM for comparison. Finally, based on the results of the initial testing, the impedance method was utilized in an attempt to detect damage during a fatigue test of an experimental wind turbine blade at the National Renewable Energy Laboratoryâ s National Wind Technology Center.
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Martinez-Tamayo, Federico. "The impact of evaporatively cooled turbine blades on gas turbine performance." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/47385.

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Valero, Ricart Omar Ruben. "Multidisciplinary concurrent optimization of gas turbine blades." Thesis, University of Oxford, 2015. https://ora.ox.ac.uk/objects/uuid:b89d8f80-9134-4856-8223-5f55967c0bde.

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This thesis presents the study and development of optimization methods that can perform concurrent aerodynamic-aeroelastic blade optimization in a multi-bladerow environment, and for realistic turbomachinery blade geometries. The Nonlinear Harmonic Phase Solution Method has been chosen as the flow solution method of this work because of its capability to calculate the aeroelasticity features of interest (blade flutter) and the main flow aerodynamic performance in steady flow timescales. The first optimization method that is shown is a more generic non-gradient method with an improved version of a quadratic Response Surface Model. The new Re-Scaled Response Surface Model has shown marked convergence and performance improvements against traditional surrogate models. However, the computational cost of this method for cases with a large number of design variables limits its real applications. A gradient-based adjoint method is presented next as a cost-independent alternative that can accomplish efficient multi-bladerow optimization for a large number of variables within the current levels of computational power. The continuous adjoint system has been developed based on the same methodology as the flow solution method and it shows a more consistent relation between the flow field and its corresponding adjoint field, in agreement with the "anti-physics" information path. An adjoint interface treatment has been developed as an extension of the flow harmonic interface treatment. This unique treatment allows capture of the damping sensitivities of the vibrating blade to shape changes in adjacent rows. The application of this method to the design optimization of compressor and turbine stages has shown its capability to perform efficient multicomponent and multi-disciplinary design optimization of turbomachinery blades.
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Dong, Yuan. "Boundary layers on compressor blades." Thesis, University of Cambridge, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278266.

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Books on the topic "Turbine blades"

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Bagnall, Stephen M. Impact damping of high pressure turbine blades. Birmingham: University of Birmingham, 1985.

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Chortis, Dimitris I. Structural Analysis of Composite Wind Turbine Blades. Heidelberg: Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-00864-6.

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Barnard, Mark C. S. Pistons to blades: Small gas turbine developments by the Rover Company. Derby: Rolls-Royce Heritage Trust, 2003.

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Hybrid anisotropic materials for wind power turbine blades. Boca Raton, Fla: CRC Press, 2012.

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Klein, William E. Model 0A wind turbine generator FMEA. [Washington, D.C: National Aeronautics and Space Administration, 1989.

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Klima, Stanley J. NDE of PWA 1480 single crystal turbine blade material. [Washington, DC: National Aeronautics and Space Administration, 1993.

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Martinez-Sanchez, Manuel. Turbine blade-tip clearance excitation forces: Final report on Contract number NAS8-35018. Cambridge, Mass: Massachusetts Institute of Technology, 1985.

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Martinez-Sanchez, Manuel. Turbine blade-tip clearance excitation forces: Final report on Contract number NAS8-35018. Cambridge, Mass: Massachusetts Institute of Technology, 1985.

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Sadowski, Tomasz, and Przemysław Golewski. Loadings in Thermal Barrier Coatings of Jet Engine Turbine Blades. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-0919-8.

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Boyle, Robert J. Navier-Stokes analysis of turbine blade heat transfer. [Washington, D.C.]: NASA, 1990.

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Book chapters on the topic "Turbine blades"

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McGugan, Malcolm. "Design of Wind Turbine Blades." In MARE-WINT, 13–24. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-39095-6_2.

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McGugan, Malcolm. "Application for Wind Turbine Blades." In New Trends in Structural Health Monitoring, 373–427. Vienna: Springer Vienna, 2013. http://dx.doi.org/10.1007/978-3-7091-1390-5_7.

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Mahri, Z. L., M. S. Rouabah, and Z. Said. "Aeroelastic simulation of wind turbine blades." In Lecture Notes in Electrical Engineering, 313–23. Boston, MA: Springer US, 2009. http://dx.doi.org/10.1007/978-0-387-76483-2_27.

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Rieger, N. F. "Damping Properties of Steam Turbine Blades." In CISM International Centre for Mechanical Sciences, 515–41. Vienna: Springer Vienna, 1988. http://dx.doi.org/10.1007/978-3-7091-2846-6_20.

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Marin, Juan C., Alberto Barroso, Federico Paris, and Jose Canas. "Fatigue Failure in Wind Turbine Blades." In Alternative Energy and Shale Gas Encyclopedia, 52–68. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119066354.ch5.

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Schulz, Volker, Thomas Dreyer, Thomas Speer, and Hans Georg Bock. "Optimum Shape Design of Turbine Blades." In Operations Research Proceedings, 190–95. Berlin, Heidelberg: Springer Berlin Heidelberg, 1996. http://dx.doi.org/10.1007/978-3-642-80117-4_33.

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Pagano, Nicholas J., and Som R. Soni. "Strength Analysis of Composite Turbine Blades." In Solid Mechanics and Its Applications, 364–87. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-017-2233-9_28.

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Elango, Murugappan, Adithyan Annamalai, and Paruchuri Sai Tej. "Harmonic Analysis on Axial Turbine Blades." In Lecture Notes in Mechanical Engineering, 23–35. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-6738-1_3.

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Li, Hui, Wensong Zhou, and Jinlong Xu. "Structural Health Monitoring of Wind Turbine Blades." In Advances in Industrial Control, 231–65. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-08413-8_9.

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Tsukimura, R. R., P. E. Underhill, and M. J. Wells. "Sensitivity of Core Detection in Turbine Blades." In Neutron Radiography, 329–36. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3871-7_43.

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Conference papers on the topic "Turbine blades"

1

Murthy, Raghavendra, and Marc P. Mignolet. "Decreasing Bladed Disk Response With Dampers on a Few Blades: Part II—Nonlinear and Blade-Blade Dampers Applications." In ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-69797.

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This two part paper focuses on the optimum placement of a limited number of dampers, i.e. fewer than the number of blades, on a bladed disk to induce the smallest possible amplitude of blade response with or without involuntary, random mistuning. Intentional mistuning is also considered as an option to reduce the amplitude of blade response and the pattern of two blade types (referred to as A and B blades) is then part of the optimization effort in addition to the location of the dampers on the disk. This second part of the investigation focuses on the application of the optimization algorithms developed in Part I to nonlinear dampers, more specifically friction dampers, as well as to the consideration of blade-blade dampers, linear or nonlinear (underplatform dampers). Additionally, the optimization of blade-only and blade-blade linear dampers will be extended to include uncertainty/variability in the damper properties that arise during the manufacturing and/or inservice. It is found that the optimum achieved without considering such uncertainty/variability is robust with respect to it.
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Tamai, Ryoji, Ryozo Tanaka, Yoshichika Sato, Karsten Kusterer, Gang Lin, Martin Kemper, and Lars Panning-von Scheidt. "Vibration Analysis of Shrouded Turbine Blades for a 30 MW Gas Turbine." In ASME 2013 Turbine Blade Tip Symposium. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/tbts2013-2014.

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Turbine blades are subjected to high static and dynamic loads. In order to reduce the vibration amplitude means of friction damping devices have been developed, e.g. damping wires, interblade friction dampers and shrouds. This paper presents both numerical and experimental results for investigating the dynamical behavior of shrouded turbine blades. The studies are focused on the lowest family of the bladed disk. The aspect of experimental studies, the effect of the shroud contact force on the resonance frequency of the blade was examined by using the simplified blade test stand. Based on the result of the simplified blade studies, the shroud contact force of the real blade was determined in order to stabilize the resonance frequencies of the bladed disk system. The resonance frequencies and mode shapes of the real bladed disk assembly were measured in no rotation and room temperature condition. Finally, the dynamic strains were measured in the actual engine operations by using a telemetry system. The aspect of analytical studies, a non-linear vibration analysis code named DATES was applied to predict vibration behavior of a shrouded blade model which includes contact friction surfaces. The DATES code is a forced response analysis code that employs a 3-dimensional friction contact model. The Harmonic Balance Method (HBM) is applied to solve resulting nonlinear equations of motion in frequency domain. The simulated results show a good agreement with the experimental results.
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Whitehead, D. S., and D. H. Evans. "Flutter of Grouped Turbine Blades." In ASME 1992 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/92-gt-227.

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An analysis is presented to predict flutter in a wheel of turbine blades which are connected together into a number of identical groups. The natural frequencies and mode shapes of a group are assumed to be known. The unsteady aerodynamic coefficients for free-standing blades are assumed to be known from an unsteady aerodynamic program, and FINSUP is used here. The work fed into the vibration by the aerodynamic forces is then calculated. This is illustrated by two examples of low pressure steam turbine blade rows GR-1 and GR-2. On GR-1 the three modes considered are all found to be stable, but on GR-2 the lowest frequency mode shows some instability. Tying the blades together in groups is found to be stabilizing. Blade response, measured by a Blade Vibration Monitor at two different installations, is shown for a range of operating conditions. The measured responses indicate the GR-1 blade is stable whereas the GR-2 blade shows, at the lowest frequency, high response that is dependent on turbine operating conditions.
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Liburdi, J., P. Lowden, and C. Pilcher. "Automated Welding of Turbine Blades." In ASME 1989 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1989. http://dx.doi.org/10.1115/89-gt-307.

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The welding of superalloys has been regarded, generally, as an art requiring the highest degree of welder skill and discipline. These highly alloyed materials are prone to micro-cracking and, in some cases, even the best welders cannot achieve satisfactory results. Now, however, advances in automation technology have made it possible to program precisely the complex airfoil shapes and the welding parameters. Consequently, turbine blades can be welded in a repeatable manner, with a minimum of heat input resulting in better metallurgical quality both in the base metal and the weld deposit. The application of this technology to the automated welding of high-pressure compressor turbine blade tips, and the refurbishment of low-pressure turbine blade shrouds are presented in this paper.
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Krishnamoorthy, V., R. Lakshminarayanan, and B. Ramachandra Pai. "GROOVE COOLING OF TURBINE BLADES." In International Heat Transfer Conference 9. Connecticut: Begellhouse, 1990. http://dx.doi.org/10.1615/ihtc9.1510.

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Dixit, S., M. Chin, and R. Dixit. "Coatings for Polymer Turbine Blades." In ITSC2009, edited by B. R. Marple, M. M. Hyland, Y. C. Lau, C. J. Li, R. S. Lima, and G. Montavon. ASM International, 2009. http://dx.doi.org/10.31399/asm.cp.itsc2009p1189.

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Abstract Erosion-resistant coatings on high-temperature polymer matrix composites are of great interest for turbine blade applications. This study evaluates the erosion resistance of thermal spray coatings using conventional weight loss methods in order to compute net erosion volume loss and assess thermal cycling durability. During erosion tests, coated polymer composite coupons were subjected to runway sand and aluminum oxide erodent at different temperatures and angles of incidence. Erosion test data are reported along with the results of coated polymer matrix composite blades.
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Purushothaman, Kirubakaran, Sankar Kumar Jeyaraman, Ajay Pratap, and Kishore Prasad Deshkulkarni. "Cold Blade Profile Generation Methodology for Compressor Rotor Blades Using FSI Approach." In ASME 2017 Gas Turbine India Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gtindia2017-4762.

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This paper describes a methodology for obtaining correct blade geometry of high aspect ratio axial compressor blades during running condition taking into account of blade untwist and bending. It discusses the detailed approach for generating cold blade geometry for axial compressor rotor blades from the design blade geometry using fluid structure interaction technique. Cold blade geometry represents the rotor blade shape at rest, which under running condition deflects and takes a new operating blade shape under centrifugal and aerodynamic loads. Aerodynamic performance of compressor primarily depends on this operating rotor blade shape. At design point it is expected to have the operating blade shape same as the intended design blade geometry and a slight mismatch will result in severe performance deterioration. Starting from design blade profile, an appropriate cold blade profile is generated by applying proper lean and pre-twist calculated using this methodology. Further improvements were carried out to arrive at the cold blade profile to match the stagger of design profile at design operating conditions with lower deflection and stress for first stage rotor blade. In rear stages, thermal effects will contribute more towards blade deflection values. But due to short blade span, deflection and untwist values will be of lower values. Hence difference between cold blade and design blade profile would be small. This methodology can especially be used for front stage compressor rotor blades for which aspect ratio is higher and deflections are large.
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Kaneko, Yasutomo, Kazushi Mori, and Hiroharu Ooyama. "Resonant Response and Random Response Analysis of Mistuned Bladed Disk Consisting of Directionally Solidified Blade." In ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/gt2015-42875.

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Recently, DS (Directionally Solidified) and SC (Single Crystal) alloys have been widely applied for gas turbine blades instead of CC (Conventional Casting) alloys, in order to improve the creep rupture strength. The DS blade consists of several columnar grains of SC, where the growing direction of the columnar crystal is set to the direction of the centrifugal force. Because the elastic constants of the DS blade are anisotropic, the mistuning characteristics of the bladed disk consisting of the DS blades seem to be different from those of the CC blade. In this study, the resonant response and random response analysis of mistuned bladed disks consisting of the DS blades are carried out, considering the deviations of the elastic constants and the crystal angle of the DS blade. The FMM (Fundamental Mistuning Model) and the conventional modal analysis method are used to analyze the vibration response of the mistuned bladed disk. The maximum resonant response and random response of the mistuned bladed disk consisting of the DS blades are estimated by the Monte Carlo simulation combining with the response surface method. These calculated results for the DS blades are compared with those of the CC blades. From these results, it is concluded that the maximum response of the mistuned bladed disk consisting of the DS blades is the nearly same as that of the CC blades. However, in the design of the tuned blade, where the blade resonance should be avoided, it is necessary to consider that the range of the resonant frequency of the DS blade becomes wider than that of the CC blade.
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Carnero, A., J. Kubiak, and A. López. "Finite Element Analysis of Turbine Blades." In ASME 1991 International Computers in Engineering Conference and Exposition. American Society of Mechanical Engineers, 1991. http://dx.doi.org/10.1115/cie1991-0121.

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Abstract Frequent failures of long turbine blades forced an electrical utility to sponsor research work to find out the causes of the failures. One of the techniques applied in this work was finite element analysis. The paper presents an application of the finite element method for computation of the natural frequencies, steady-state and alternating stresses, deformations due to forces acting on the blades and modal shapes of the turbine long blade groups. Two stages, L-1 and L-0 of the low pressure part of a steam turbine, were analyzed. It has been postulated that the results of the FEM analysis of the blades groups would be complementary to those obtained from the radio telemetry test (which was carried out during operation of the turbine) for the purpose of blade group failure diagnosis. However, the results of the analysis show that the FEM results were decisive in blade failure identification (L-1 stage moving blades). The graphical post processor of the FEM code revealed that the first blade in the group was the one most protruding from the stage rotating plane, thus indicating that this blade was the most prone to erosion. This was confirmed in the inspection of the turbine. This finding showed why only the first blade in the group was cracked (erosion induced cracks). The mode shapes were also very helpful in identifying other types of cracks which affected other parts of the blades. It can be concluded that the finite element method is very useful for identification of very difficult cases of blade faults and indispensable for carrying out modifications to prevent future failures.
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Murthy, Raghavendra, and Marc P. Mignolet. "Decreasing Bladed Disk Response With Dampers on a Few Blades: Part I—Optimization Algorithms and Blade-Only Dampers Applications." In ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-69789.

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This two part paper focuses on the optimum placement of a limited number of dampers, i.e. fewer than the number of blades, on a bladed disk to induce the smallest possible amplitude of blade response with or without involuntary, random mistuning. Intentional mistuning is also considered as an option to reduce the amplitude of blade response and the pattern of two blade types (referred to as A and B blades) is then part of the optimization effort in addition to the location of the dampers on the disk. This first part focuses on the formulation and validation of dedicated algorithms for the selection of the damper locations and, when appropriate, of the intentional mistuning pattern. Given the limited number of dampers, there is a concern that the failure of one or several of them could lead to a sharp rise in blade response and this issue is addressed by including the possibility of damper failure in the optimization process to yield a fail-safe optimized solution. The high efficiency and accuracy of the optimization algorithms is assessed in comparison with computationally very demanding exhaustive search results.
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Reports on the topic "Turbine blades"

1

Smith, Kevin J., and Dayton A. Griffin. Supersized Wind Turbine Blade Study: R&D Pathways for Supersized Wind Turbine Blades. Office of Scientific and Technical Information (OSTI), March 2019. http://dx.doi.org/10.2172/1498695.

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Cao, Yiding. An Innovative Turbine Blade Cooling Technology and Micro/Miniature Heat Pipes for Turbine Blades. Fort Belvoir, VA: Defense Technical Information Center, July 2000. http://dx.doi.org/10.21236/ada381455.

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ASHWILL, THOMAS D. Parametric Study for Large Wind Turbine Blades: WindPACT Blade System Design Studies. Office of Scientific and Technical Information (OSTI), August 2002. http://dx.doi.org/10.2172/801402.

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ASHWILL, THOMAS D. Cost Study for Large Wind Turbine Blades. Office of Scientific and Technical Information (OSTI), May 2003. http://dx.doi.org/10.2172/811158.

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Van Buren, Kendra L., Mark G. Mollineaux, Francois M. Hemez, and Darby J. Luscher. Developing Simplified Models of Wind Turbine Blades. Office of Scientific and Technical Information (OSTI), October 2012. http://dx.doi.org/10.2172/1053548.

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Desmond, M., S. Hughes, and J. Paquette. Structural Testing of the Blade Reliability Collaborative Effect of Defect Wind Turbine Blades. Office of Scientific and Technical Information (OSTI), June 2015. http://dx.doi.org/10.2172/1215097.

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GRIFFIN, DAYTON A., and THOMAS D. ASHWILL. Blade System Design Studies Volume I: Composite Technologies for Large Wind Turbine Blades. Office of Scientific and Technical Information (OSTI), July 2002. http://dx.doi.org/10.2172/800994.

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ASHWILL, THOMAS D. Innovative Design Approaches for Large Wind Turbine Blades. Office of Scientific and Technical Information (OSTI), March 2003. http://dx.doi.org/10.2172/809617.

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Valencia, Ulyses, and James Locke. Design studies for twist-coupled wind turbine blades. Office of Scientific and Technical Information (OSTI), June 2004. http://dx.doi.org/10.2172/918776.

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Skone, Timothy J. Horizontal Turbine Blades, 1.5-6 MW Capacity, Manufacturing. Office of Scientific and Technical Information (OSTI), October 2010. http://dx.doi.org/10.2172/1509390.

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