Relevant bibliographies by topics / Francis-Turbine

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
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Academic literature on the topic 'Francis-Turbine'

Author: Grafiati
Published: 4 June 2021
Last updated: 20 February 2023

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Journal articles on the topic "Francis-Turbine"

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Chen, Zhenmu, and Young-Do Choi. "Suppression of cavitation in the draft tube of Francis turbine model by J-Groove." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 9 (October 6, 2018): 3100–3110. http://dx.doi.org/10.1177/0954406218802310.

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Cavitation is recognized as a phenomenon that can cause serious damage to a hydro turbine and can reduce its performance when operating at off-design point. This is an undesired phenomenon, which needs to be improved. In order to suppress the cavitation in the Francis turbine draft tube, a technology with grooved draft tube named J-Groove is introduced in the Francis turbine. The Francis turbine performance and the internal flow characteristic are investigated both with and without J-Groove installation by the experimental method and numerical simulation. Visualization was used to capture the cavitation rope in the Francis turbine draft tube to compare with the computational fluid dynamics analysis result. The results show that the turbine performance both with and without J-Groove installation is quite similar. Regardless of impact on performance of Francis turbine by J-Groove, it suppresses the cavitation vortex rope and pressure fluctuation in the Francis turbine draft tube efficiently.
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Ghimire, A., P. Sapkota, A. Kayastha, B. S. Thapa, Y. D. Choi, and Y. H. Lee. "Experimental Analysis of a Simplified Francis Turbine." IOP Conference Series: Earth and Environmental Science 1037, no. 1 (June 1, 2022): 012014. http://dx.doi.org/10.1088/1755-1315/1037/1/012014.

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Abstract Introduction of Francis turbine in Nepalese micro hydropower project has been considered to uplift the turbine manufacturing ability of the local turbine manufacturers, along with the rejuvenation of the micro hydro sector in Nepal. The Francis turbine used in this study was designed for a Micro hydropower plant in Nepal. The design has been simplified in order to facilitate the local manufacturing of the turbine. The locally manufactured Francis turbine has been tested at Turbine Testing Laboratory under variable rotational speed and discharge. The performance of the Francis turbine has been measured at different operating conditions. The CFD analysis performed on the turbine has also been compared to the results obtained from the experiments. The results of pressure fluctuations, during a transient phenomenon, increase in speed of the runner under no load conditions (runaway), has also been studied under different operating conditions.
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Salehi, Saeed, and Håkan Nilsson. "OpenFOAM for Francis Turbine Transients." OpenFOAM® Journal 1 (November 17, 2021): 47–61. http://dx.doi.org/10.51560/ofj.v1.26.

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The flexibility and fast responsiveness of hydropower systems make them a reliable solution to overcome the intermittency of renewable energy resources and balance the electrical grid. Therefore, investigating the complex flow fields during such operation is essential to increase the reliability and lifetime of future hydropower systems. The current article concerns the utilization of OpenFOAM for the numerical study of Francis turbines during transient load change operations. The details of employed models and numerical schemes are thoroughly explained. The Laplacian smoothing algorithm is applied for the deformation of the guide vane domain. The impact of different mesh diffusivity parameters on both load rejection and acceptance operations is studied. It is shown that general slip boundary conditions cannot be used for slipping points on the guide vane upper and lower surfaces. Instead, different alternatives are introduced and compared. The developed framework is tested on a high-head Francis turbine. Different transient operations are simulated and results are compared to the experimental data. It is shown that OpenFOAM can be employed as a trustworthy CFD solver for numerical investigation of Francis turbines transient operations.
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Obretenov,, V. S. "Modernization of Francis Water Turbine." Journal of the Mechanical Behavior of Materials 11, no. 5 (October 2000): 365–72. http://dx.doi.org/10.1515/jmbm.2000.11.5.365.

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Zhang, Si Qing, Guo Hua Ma, Yun Long Zhang, and Dong Wang. "Hydraulic Turbine Blades Modeling Based on Two-Dimensional Wooden Patterns." Advanced Materials Research 860-863 (December 2013): 1521–24. http://dx.doi.org/10.4028/www.scientific.net/amr.860-863.1521.

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There are many difficulties to design, processing and research on numerical simulation for Francis turbine because of the complexity of blade shape and the difficulty of solid modeling. Based on two-dimensional wooden patterns of Francis turbine blades, this article aims to complete blades three-dimensional modeling for Francis turbine runner with long and short blades by means of Pro-E software which has powerful 3D modeling function. After comparing three kinds of available methods to generate blade across section which provided by Pro-E, finally completed blades three-dimensional modeling by method of generating across section with point files, established a smooth and accurate three-dimensional model. The method provides an accurate physical model for the numerical simulation of the Francis turbine with long and short blades, as well as provides a feasible approach for hydro-mechanical blades modeling.
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Gat, Shrenik B. "Modal Analysis of Francis Turbine Blade Using Composite Material." International Journal Of Mechanical Engineering And Information Technology 05, no. 04 (April 8, 2017): 1855–60. http://dx.doi.org/10.18535/ijmeit/v5i4.01.

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Lama, Ram, Saroj Gautam, Hari Prasad Neopane, Biraj Singh Thapa, Sailesh Chitrakar, and Ole Gunnar Dahlhaug. "Recent developments in the optimization of Francis turbine components for minimizing sediment erosion." IOP Conference Series: Earth and Environmental Science 1037, no. 1 (June 1, 2022): 012009. http://dx.doi.org/10.1088/1755-1315/1037/1/012009.

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Abstract Sediment erosion in hydraulic turbines are severe in case of hydropower plants operating in Himalayan Rivers of Nepal. Francis turbine components are heavily eroded while hard particles as quartz flow along with water through the water conduit in power plant. In Francis turbines, the runner blades where significant portion of hydraulic energy converts in mechanical energy are heavily eroded. This is due to complexity in fluid flow while operated at different operating conditions with sediment contained water. Conventional design of Francis turbines has overlooked on the effects of sediment erosion while considering optimum efficiency at all operating conditions. This paper examines multi-objective optimization of a reference 92 kW model Francis runner for minimizing sediment erosion effects. The model turbine studied in this paper is a scale down model turbine of Jhimruk Hydropower Plant, Nepal that is severely affected by sediment erosion. It was found that sediment erosion was reduced significantly at part load, full load and best efficiency point with improvement in hydraulic performance for model turbine utilizing multi-objective optimization on runner blade design.
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LIAO, Weili. "Unsteady Flow Analysis of Francis Turbine." Journal of Mechanical Engineering 45, no. 06 (2009): 134. http://dx.doi.org/10.3901/jme.2009.06.134.

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LUO, Xingqi. "Steady Flow Analysis of Francis Turbine." Journal of Mechanical Engineering 45, no. 04 (2009): 208. http://dx.doi.org/10.3901/jme.2009.04.208.

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Gomes Pereira, João, Loïc Andolfatto, and François Avellan. "Monitoring a Francis turbine operating conditions." Flow Measurement and Instrumentation 63 (October 2018): 37–46. http://dx.doi.org/10.1016/j.flowmeasinst.2018.07.007.

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Dissertations / Theses on the topic "Francis-Turbine"

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Bergmann-Paulsen, Jonas. "FSI-analysis of a Francis turbine." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for energi- og prosessteknikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-19081.

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Sediment erosion in Francis turbines is a big problem in hydropower plants in and around the Himalayas. The sediment composition in the rivers contains high levels of the hard mineral quarts. When the sediments enter the turbine they cause erosive damage to exposed parts such as covers, guide vanes and runner. The sediment concentration is at its highest during the monsoon period. During this period some turbines are stopped when the sediment consentration reaches certain levels to reduce the damage. Jhimruk power plant in the mid-western part of Nepal is a good example of how the sediment erosion affects the operation of a power plant. During the monsoon period the turbines can be eroded to an almost unrepairable state. The turbines have to go through substantial annually maintenance. A result of this is reduced power output and high maintenance costs. It is therefore of interest to design a new Francis turbine that can better withstand the sediment erosion. A cooperation project between Kathmandu University and The Norwegian University of Science and Technology was started as a part of the RenewableNepal project which aims to develop and start manufacturing of erosion resistant Francis turbines.A parameter study of different blade designs have been performed to find a more erosion resistant design. In this thesis FSI analyses have been performed on three different designs to verify their structural integrity. The designs transfers the hydraulic energy from the water to the blade in different sections. The results showed a stress distribution which coincided with the energy transfer along the blade. The reference design was analyzed with two different blade thickness. For all the designs the stress was relatively low compared to the criteria for hydraulic turbines.
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Alnaga, Ahmed. "Conception optimale du tracé hydraulique des turbines Francis." Grenoble INPG, 2006. http://www.theses.fr/2006INPG0163.

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Devant le nombre de degré de liberté disponible dans le choix d'une nouvelle conception d'une turbomachine ou dans l'amélioration d'une machine existante. Il est aujourd'hui nécessaire de développer des techniques de conception et d'optimisation à base d'outils mathématiques permettant l'intégration efficace des méthodes et outils développées dans le dimensionnement et l'analyse des écoulements internes. Ces techniques permettent alors la recherche des meilleurs compromis conduisant à une conception optimisée. Mon travail recherche m'a permis de mettre au point une technique de tracé et d'optimisation de la géométrie des turbines FRANCIS. Cette technique est basée sur une paramétrisation géométrique de tous les éléments de la turbine (bâche avant-distributeur, directrices, roue et aspirateur). L'écoulement est ensuite estimé avec des logiciels de CFD et une fonction objectif définie à partir des performances recherchée pour la machine est évaluée à partir de l'écoulement calculé. Cette fonction objectif est donc une fonction non linéaire des paramètres qui ont servis à paramétriser la géométrie. Son optimisation est alors possible en utilisant, par exemple des algorithmes génétiques. Pour mettre en œuvre une telle optimisation, il est nécessaire d'automatiser l'ensemble du processus grâce à des scripts informatiques, pour construire la géométrie de la turbine à partir des paramètres, puis un maillage robuste des domaines de calcul. Le calcul CFD, avec le post-processing qui permet d'estimer la fonction objectif, sont ensuite exécutés automatiquement pour compléter un cycle de calcul. J'ai mis au point une telle technique d'optimisation pour toute la partie "haute pression" de la turbine. Pour la roue, une technique "manuelle" d'optimisation, beaucoup plus rapide que l'automatique, a été utilisée (5 à 10 itérations à comparer avec 150 à 200 calculs pour la méthode automatique)
Because of the higher number of parameters available in the choice of a new design of a turbomachinery or in the improvement of an existing machine. It is today necessary to develop techniques of design and optimization based on mathematical tools allowing the effective integration of the methods and tools developed in dimensioning and in the analysis of the internal flows. These techniques then allow the research of the best compromises leading to an optimized design. My research work enabled me to develop a technique of design and optimization of FRANCIS turbines. This technique is based on a geometry parameterization of ail the elements of the turbine (Spiral-Casing, distributor, runner and draft tube). The flow is then estimated with software of CFD and a function objective defined starting from the performances sought for the machine is evaluated starting from the calculated flow. This function objective is thus a nonlinear function of the parameters which were used for geometry parametrization. Its optimization is then possible while using, for example genetic algorithms. To make an optimization, it is necessary to automate the whole of the process thanks to data-processing scripts, to build the geometry of the turbine starting from the parameters, with a robust grid for the domain calculations, Then Calculation CFD, with the postprocessing which makes it possible to estimate the function objective, are then carried out automatically to supplement a cycle of calculation. I developed such a technique of optimization for ail the part "high pressure" of the turbine. For the runner, a "manual" technique of optimization, much faster than the automatic, was used (5 to 10 iterations to be compared with 150 to 200 calculations for the automatic method). This technique was tested successfully for two examples of turbine Francis, one at slow specific speed (nq=48), the other rapid (nq=81)
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Gjøsæter, Kristine. "Hydraulic Design of Francis Turbine Exposed to Sediment Erosion." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for energi- og prosessteknikk, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-14256.

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Sediment erosion is a large problem for turbines operated in sand laden water, especially in the Himalayas and the Andes Mountains, where the contents of hard minerals in the rivers are high. A program called <i>RenewableNepal</i> supports the development of a new design philosophy for hydraulic turbines. NTNU and Kathmandu University cooperate within this program, and this master thesis is part of that cooperation.The objective of this thesis is to carry out the hydraulic design of a Francis turbine with reduced velocities. As part of that, a design software has been developed, using Matlab as programming tool. This software has been used to generate a reference design with the same physical dimensions as for the existing runners at Jhimruk Hydrorelectric Centre in Nepal. CFD analysis has been performed to verify the design software output, showing good results. Analysis of erosion from CFD were not successful as mesh independency for the analysis could not be established. Hence results for erosion prediction from CFD studies has not been presented in this thesis.A parametric study has been carried out, varying either the outlet diameter, the number of pole pairs, the inlet velocity, the acceleration of the flow through the runner, the height of the shroud or the blade angle distribution. An erosion model was implemented in the design software, and used as a control variable for the parametric study. CFD analyses using Ansys CFX were performed for selected designs with lower erosion than the reference design. The largest reduction of erosion was obtained when increasing the number of pole pairs, which implies that the rotational speed of the turbine is decreased. This does however increase the size of both the turbine and the generator, which cause increased investment costs as well. CFD analysis shows that the hydraulic efficiency for this design is higher than for the reference design. It was also discovered that by changing the blade angle distribution, and consequently also the energy distribution, a substantial reduction of erosion was possible without changing the physical dimensions or the rotational speed of the turbine. The efficiency for this design is also higher than for the reference design. The most promising design was found as a combination of these two effects, giving a reduction of the erosion of 50 percent compared to the reference design. CFD analysis for this design show a good efficiency and acceptable flow conditions in the runner. This and other designs with the modified blade angle distribution will have an unconventional energy conversion through the runner, leading to larger hydraulic forces on the trailing edge of the blades. Strength analyses of the blade would be beneficial, but have not been performed.The main focus in this thesis has been on developing the design software and developing runner designs for reducing sediment erosion. There have been no attempts for optimizing the designs of the guide vanes and stay vanes due to time constraints.
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Gogstad, Peter Joachim. "Hydraulic design of Francis turbine exposed to sediment erosion." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for energi- og prosessteknikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-16772.

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High concentrations of sediments is a serious problem for hydropower stations in the Himalayas and the Andes Mountains. For run-of-river power plants sediment causes heavy erosion even with settling basins. This leads to reduced operating hours and high maintenance cost. In addition, the original design experienced problem with heavy cavitation.The objective of this master thesis is to carry out new hydraulic design of the runner and guide vanes of the existing Francis turbines in La Higuera Power Plant with reduced velocity components. To achieve this the cause of the heavy cavitation, which made the turbine fail, has to be established.Results from numerical simulations indicates a low pressure zone causing heavy leading edge cavitation is the reason for the turbine failure. The off-design operation has made the cavitation even worse.To carry out a new design, the in-house design software Khoj was used. Some new parameters, like blade leaning, were included in the program. Blade leaning is an important tool for pressure balancing the runner blade. Further, a parameter study was carried out to investigate the effect of blade leaning, blade angle distribution and blade length. The numerical simulation indicates proper pressure balancing could have avoided the cavitation problems and a new design should have an X-blade shape. Because the power plant is already built, the number of variables is limited. The rotational speed, inlet and outlet diameter remained constant. This made it impossible to significantly reduce the relative velocities. Therefore, coating of all wet surfaces is proposed to reduce the effect of erosion.The main objective for this thesis has been to identify the cause of the turbine failure and develop a new design to fit in the existing power plant. Complete 3D-drawings of the design, including runner and guide vanes, has not been made due to lack of time.
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Chitrakar, Sailesh. "FSI analysis of Francis turbines exposed to sediment erosion." Thesis, KTH, Kraft- och värmeteknologi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-133298.

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Sediment erosion is one of the key challenges in hydraulic turbines from a design and maintenanceperspective in Himalayas and Andes. Past research works have shown that the optimization of theFrancis turbine runner blade shapes can decrease erosion by a signicant amount. This study conductedas a Master's Thesis has taken the proposed designs from past works and conducted a CFDanalysis on a single passage of a Francis runner blade to choose an optimized design in terms of erosionand eciency. Structural analyses have been performed on the selected design through one-way andtwo-way FSI to compare the structural integrity of the designs.Two types of cases have been considered in this thesis work to dene the boundary condition of thestructural model. In the rst case, a runner blade is considered to have no in uence of the joint andother stier components. In the second case, a sector of the whole runner has been modeled withnecessary boundary conditions. Both one-way and two-way FSI have been performed on the casesfor the designs. Mesh independent studies have been performed for the designs, but only for the rstcase, whereas in the second case, a ne mesh has been used to make the analysis appropriate.The loads have been imported into the structural domain from the uid on the interfaces for one-wayFSI. In the case of two-way FSI, the Multi-Field Solver (MFX) supported by ANSYS has been usedto solve the coupled eld analysis. A fully coupled FSI in ANSYS works by writing an input le inthe structural solver containing the information about the interfaces in the structural domain, whichis imported in the uid solver. The interaction between the two domains is dened in ANSYS-CFX,including the mesh deformation and solver setups. The results have been post-processed in CFX-Post,where the results from both the elds are included. It has been found that the structural integrity ofthe optimized design is better than the reference design in terms of the maximum stress induced inthe runner. The two-way FSI analysis has been found as an inevitable part of the numerical analysis.However, with the advancement of the computational capability in the future, there could be a greatscope in the research eld to carry out a fully-coupled transient simulation for the whole runner toget a more accurate solution.
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Pham, Thi Kim Loan. "Modélisation du comportement d'une roue de turbine francis au régime d'emballement." Grenoble INPG, 2002. http://www.theses.fr/2002INPG0009.

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Arpe, Alca Jorge Alejandro Arpe Jorge. "Analyse du champ de pression pariétale d'un diffuseur coudé de turbine Francis /." [S.l.] : [s.n.], 2003. http://library.epfl.ch/theses/?display=detail&nr=2779.

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Okyay, Gizem. "Utilization Of Cfd Tools In The Design Process Of A Francis Turbine." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612452/index.pdf.

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Francis type turbines are commonly used in hydropower generation. Main components of the turbine are spiral case, stay vanes, guide vanes, turbine runner and the draft tube. The dimensions of these parts are dependent mainly on the design discharge, head and the speed of the rotor of the generators. In this study, a methodology is developed for parametric optimization by incorporating Matlab codes developed and commercial Computational Fluid Dynamics (CFD) codes into the design process. The design process starts with the selection of initial dimensions from experience curves, iterates to improve the overall hydraulic efficiency and obtain the detailed description of the final geometry for manufacturing with complete visualization of the computed flow field. A Francis turbine designed by the procedure developed has been manufactured and installed for energy production.
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Tørklep, Anders Mathias. "Pressure oscillations during start and stop of a high head Francis turbine." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for energi- og prosessteknikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-19323.

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Start and stop procedures affect pressure oscillations throughout a hydropower plant. A desire to study how pressure oscillations behave during these dynamic conditions was the basis of this report. Instrumentation, experimentation and measurement analysis was conducted on a Francis model turbine in the Waterpower Laboratory at NTNU. Eight pressure transducers were calibrated and used during the experiments. Two transducers were installed in the draft tube below the turbine. One was placed in the vaneless space between the guide vanes and the impeller vanes. Three pressure transducers on an impeller vane and two transducers located at the inlet were also included in the experiments. Frequency analysis (PSD) was carried out for all the measurements to explore various pressure oscillations. Except for the low frequent oscillations (< 30 Hz), definite frequencies repeatedly dominated the frequency domain during start/stop as well as for steady state operation. The impeller vane oscillation showed an increase in pressure amplitude during guide vane closing. A bigger amplitude increase was registered for BEP than for part load and full load operation. The guide vane frequency was located in and only in the runner. The amplitude of the guide vane frequency was significant and was located for all studied operational points. The power of this oscillation decreased during guide vane closing. One specific frequency arose the question of an overtone phenomenon for the water hammer oscillation, a phenomenon, were the fundamental frequency is three times higher than the customary water hammer frequency.
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Meland, Hallvard. "A new Design of a Francis Turbine in order to reduce Sediment Erosion." Thesis, Norwegian University of Science and Technology, Department of Energy and Process Engineering, 2010. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-10161.

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This Master Thesis is about the sand erosion challenges with the Francis turbines. The background for studying this subject is the fact that the sand erosion problem is a very negative factor for the development of new hydro electric power plants in many developing countries. The target with this Master Thesis has been to develop a new design, a revised version of the Francis turbine, reducing the sand erosion by 30- 50 per cent compared with today´s version of turbines. The present version of Francis turbines is consisting of three different vane cascades, The stay, guide and runner cascade. The sand erosion is in proportion with the relative speed between the sand particles and the steel cubed. This challenge has thus been analyzed and solved by reducing this speed through the turbine. Regarding the stay vanes, a new design has been proposed where the stay vanes are pressing the spiral casing from outside and not from the inside. This will result in the fact that the whole sand erosion problem has been removed. It has been proposed to remove the the guide vane cascade. This will consequently remove the sand erosion problem here as well. A favourable solution is to increase the reaction degree. For the runner a study of four different parameters has been carried out. These parameters were the number of pole pair in the generator, outlet angle, reaction degree and UCu distribution. The analysis shows that a reduction of sand erosion at the runner outlet was possible by selecting a higher number of pole pair along with a higher outlet angle than what is standard practice today. This result is of high significant importance since the sand erosion is biggest at the runner outlet. A change in the reaction degree may enable the erosion at the inlet of the runner, whereas a change in the UcU will change the erosion between the inlet and outlet. By selecting favourable parameter values, a substantial reduction of sand erosion in a Francis turbine will be possible. The turbines in this Master thesis have been designed in the computer program Matlab. A proposal for new design based upon the results of the parameter study has been analyzed in a CDF analysis. This analysis has been made in Ansys CFX.

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Books on the topic "Francis-Turbine"

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Hydro-Québec. Direction Édition et publicité, ed. Vocabulaire de la turbine Francis. [Montréal]: Hydro-Québec, Vice-présidence information et affaires publiques, Direction édition et publicité, 1988.

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Yi, Chʻŏr-hyŏng. Pʻŭransisŭ suchʻa ŭi silchŭng yŏnʼgu: Chʻoejong pogosŏ = Verification of Francis type hydro turbine. [Seoul]: Chisik Kyŏngjebu, 2008.

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Yi, Chʻŏr-hyŏng. Pʻŭransisŭ suchʻa ŭi silchŭng yŏnʼgu: Chʻoejong pogosŏ = Verification of Francis type hydro turbine. [Seoul]: Chisik Kyŏngjebu, 2008.

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Yi, Chʻŏr-hyŏng. Pʻŭransisŭ suchʻa ŭi silchŭng yŏnʼgu: Chʻoejong pogosŏ = Verification of Francis type hydro turbine. [Seoul]: Chisik Kyŏngjebu, 2008.

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Husain, Zoeb. Basic fluid mechanics and hydraulic machines. Hyderabad [India]: BS Publications, 2008.

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Albrecht, Karl. Berechnung und Konstruktion Einer Francis-Turbine Mit Vertikaler Welle Und ... Creative Media Partners, LLC, 2018.

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Setting-up of a New Francis Closed Chamber Monobloc Turbine at an Irrigation Channel. European Communities / Union (EUR-OP/OOPEC/OPOCE), 1994.

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Hydro-Electric Turbines Simulation and Optimization. academia.edu, 2017.

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Wolf, E. L. Wind, hydro and tides Fully sustainable energy. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198769804.003.0008.

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Wind-turbine science and technology is outlined, following the work of Betz. Rotor design, blade construction and aspects of electric power generation are described, principally for large horizontal-axis devices, with some mention of vertical axis wind turbines. Hydropower and pumped storage are treated, with mention of Francis and Kaplan turbines. A summary of tidal energy is included. We now go into detail on some aspects of these topics. As these forms of energy come either from the Sun (in an indirect fashion) or from the motion of the Earth and Moon, they are available on an indefinite term into the future.
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Book chapters on the topic "Francis-Turbine"

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Jacob, Thierry, and Jean-Eustache Prénat. "Francis Turbine Surge: Discussion and Data Base." In Hydraulic Machinery and Cavitation, 855–64. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-010-9385-9_87.

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Shahril, K., A. Tajul, M. S. M. Sidik, K. A. Shamsuddin, and A. R. Ab-Kadir. "Analysis of a Micro Francis Turbine Blade." In Progress in Engineering Technology, 183–93. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-28505-0_15.

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Kubota, T., F. Han, and F. Avellan. "Performance Analysis of Draft Tube for Gamm Francis Turbine." In Hydraulic Machinery and Cavitation, 130–39. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-010-9385-9_12.

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Sick, Mirjam, Michael V. Casey, and Paul F. Galpin. "Validation of a Stage Calculation in a Francis Turbine." In Hydraulic Machinery and Cavitation, 257–66. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-010-9385-9_25.

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Song, Charles C. S., Xiangying Chen, Toshiaki Ikohagi, Johshiro Sato, Katsumasa Shinmei, and Kiyohito Tani. "Simulation of Flow Through Francis Turbine by Les Method." In Hydraulic Machinery and Cavitation, 267–76. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-010-9385-9_26.

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Pedrizzetti, G., and G. Angelico. "Model for Vortex Rope Dynamics in Francis Turbine Outlet." In Hydraulic Machinery and Cavitation, 915–24. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-010-9385-9_93.

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Drtina, Peter, and Matthias Krause. "Numerical Prediction of Abrasion for Francis Turbine Guide Vanes." In Notes on Numerical Fluid Mechanics (NNFM), 60–68. Wiesbaden: Vieweg+Teubner Verlag, 1996. http://dx.doi.org/10.1007/978-3-322-89838-8_9.

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Morais, Tobias S., Aldemir Ap Cavalini, Gilberto P. Melo, and Valder Steffen. "Input Force Identification in a Francis Hydro Turbine Unit Model." In Mechanisms and Machine Science, 309–23. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-99272-3_22.

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Ying, Hu, and Hu Ji. "Numerical Simulation of Turbulent Flow through a Francis Turbine Runner." In Advances in Intelligent and Soft Computing, 7–12. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-28308-6_2.

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Zhou, Lingjiu, and Zhengwei Wang. "Numerical Simulation of Traveling Bubble Cavitating Flow in a Francis Turbine." In Computational Mechanics, 262. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-75999-7_62.

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Conference papers on the topic "Francis-Turbine"

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Nakamura, Yohei, Ryosuke Shima, Hiroki Komatsu, Saki Shiratori, and Kazuyoshi Miyagawa. "Development of Shroudless Francis Turbine." In ASME/JSME/KSME 2015 Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/ajkfluids2015-02352.

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In this study, new design concepts were structured by DOE based on internal flow evaluation by CFD to realize the efficiency improvement, reliability improvement and cost reduction of a medium or small capacity hydro turbine. As a part of new concepts, shroudless type and shroud liner type runner shape were adopted. In shroud liner type, shroud line of meridional plane shape inclines at 45 degrees to rotational axis. By adopting shroud less type, runner can be made not by casting but by cutting work. For medium or small hydroelectric power plant, cost reduction is strongly required in comparison with larger scale hydro one. By adopting shroud liner type, efficiency was improved because of mitigating secondary flow. In addition, to improve reliability, shroud partial band was bonded at inlet of runner. This plays a role to prevent runner blade from breaking by tip rubbing. By using high-speed video camera and CFD analysis, it was clarified that runner outlet cavitation is caused by jet which is leakage in the tip clearance region and that leakage flow of outlet is larger than leakage flow of inlet. Moreover, by using the three-hole Pitot tube, the runner outlet flow distribution was measured and the validity of the design point was verified. Finally, by measurement of pressure on the wall of the stationary parts such as the guide vane, it was clarified that the total pressure loss of guide vane increases in stream-wise direction in low mass flow rate. In this report, the development of the shroudless Francis turbine based on the loss mechanism and flow investigation was described.
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Saeed, Raza A. "Numerical Simulation of Francis Turbine." In ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting collocated with the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/fedsm2014-21024.

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This paper presents the results of modelling of the complete three-dimensional fluid flow through the spiral casing, stay vanes, guide vanes, and then through the Francis turbine runner to the draft tube of the Derbendikhan power station. To investigate the flow in the Francis turbine and also to compute stress distribution in the runner blades, a three-dimensional model was prepared according to specifications provided. The two topics discussed in this study are: (i) the simulation of the 3D fluid flow through the inter blade channels for the Francis turbine runner by using Computational Fluid Dynamics (CFD) and, (ii) the simulation of the stress analysis of the turbine runner by using Finite Element Analysis (FEA). In this study, the water pressure obtained from the CFD analysis for different boundary conditions are incorporated into a Finite Element model to calculate stress distributions in the runner.
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Parashar, Tarun, Bhupendra K. Gandhi, and Krishna M. Singh. "Numerical Simulation of Flow through a Francis Turbine." In Computational Intelligence and Bioinformatics / Modelling, Simulation, and Identification. Calgary,AB,Canada: ACTAPRESS, 2012. http://dx.doi.org/10.2316/p.2012.755-068.

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Parashar, Tarun, Bhupendra K. Gandhi, and Krishna M. Singh. "Numerical Simulation of Flow through a Francis Turbine." In Computational Intelligence and Bioinformatics / Modelling, Simulation, and Identification. Calgary,AB,Canada: ACTAPRESS, 2011. http://dx.doi.org/10.2316/p.2011.755-068.

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Bley Lipski Júnior, Wilson, Felipe Andrade, Fernando Enrique Castillo Vicencio, and Fábio Schneider. "COMPUTATIONAL FLUID DYNAMICS APPLIED TO A FRANCIS TURBINE." In COB2019. ABCM, 2019. http://dx.doi.org/10.26678/abcm.cobem2019.cob2019-2152.

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Dewi, Riyani Prima, Bambang Anggoro, and Burhanuddin Halimi. "Francis Turbine Design on Malabar Mini Hydropower Plant." In 2018 Conference on Power Engineering and Renewable Energy (ICPERE). IEEE, 2018. http://dx.doi.org/10.1109/icpere.2018.8739449.

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Ji, XingYing, Lai Xu, and Xiao Liu. "Calculation of Axial Hydraulic Thrust of Francis Turbine." In ASME 2012 Fluids Engineering Division Summer Meeting collocated with the ASME 2012 Heat Transfer Summer Conference and the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/fedsm2012-72070.

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Put forward a method of calculating the axial thrust of Francis turbine. To use numerical simulation computing the axial thrust on hub, shroud and blade of inner runner, combine theoretical methods calculating the pressure on hub and shroud of outer runner, finally the axial thrust of Francis turbine is obtained. The results of calculation agree with the results of model test. It is an effective way of gathering the theoretical calculation and numerical simulation to calculate the axial thrust of Francis turbine. In addition the static suction of turbine has great effect on calculation results of the axial thrust. The static suction of turbine plays a significant role on the lifting of turbine.
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Ayli, Ulku Ece, Alper Kaplan, Huseyin Cetinturk, Berat Kavurmaci, Gizem Demirel, Kutay Celebioglu, and Selin Aradag. "CFD Analysis of 3D Flow for 1.4 MW Francis Turbine and Model Turbine Manufacturing." In ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/detc2015-46258.

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Hydroenergy is one of the most useful renewable energy sources. Hydropower is a vital source as it is clean, sustainable and cost effective. Francis type hydroturbines are applicable to a wide range of head and flow rate values. Spiral case, stay vane, guide vane, runner and draft tube are the basic components of a Francis turbine. In this paper, CFD based 3D numerical simulations of steady turbulent flow in a Francis turbine for an actual power plant, BUSKI HES in Turkey, is presented.
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Zhang, Maojin, Shuhong Liu, Yulin Wu, Demin Liu, and Lefu Zhang. "Numerical Investigation on Channel Vortex in a Francis Turbine." In ASME-JSME-KSME 2011 Joint Fluids Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajk2011-07022.

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When a Francis hydraulic turbine operates under different working heads at small flow condition, the fluid in the flow passage will generate vortex shedding near the blade leading-edge and form the channel vortex in the blade passages due to the mismatch between the outlet angle of guide vane and the inlet angle of runner blade. The severity of channel vortex will trigger high-frequency vibration or generate unit resonant vibration, affecting the operational stability of the turbines. In this paper some typical operation points were chosen out for the steady simulation of a model turbine according to a unit hill-chart. The computational domain was chosen as the whole flow passage from the inlet of the volute to the outlet of the draft tube. Based on RNG k–ε turbulence model, the internal flows was simulated, and the occurrence of vortex between the turbine runner blades was discussed. The numerical results show that the vortex motion near the development-line (IVDL) is stronger than that near the channel vortex inception-line (IVIL) in channel vortex zone marked in the hill-chart. The velocity triangle is used to explain the reasons that channel vortex occur in the suction side at high working head while in the pressure side at the low working head, and two different forms and formation mechanism of the channel vortex were analyzed.
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Yamaguchi, N., T. Tanaka, and K. Miyagawa. "Improvement of Partial Load Performance of Francis Turbine Runner." In 2014 ISFMFE - 6th International Symposium on Fluid Machinery and Fluid Engineering. Institution of Engineering and Technology, 2014. http://dx.doi.org/10.1049/cp.2014.1138.

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Reports on the topic "Francis-Turbine"

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Alan Sullivan. Final Report: Retrofit Aeration System (RAS) for Francis Turbine. Office of Scientific and Technical Information (OSTI), August 2006. http://dx.doi.org/10.2172/891966.

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Duncan, Joanne P., and Thomas J. Carlson. Characterization of Fish Passage Conditions through a Francis Turbine, Spillway, and Regulating Outlet at Detroit Dam, Oregon, Using Sensor Fish, 2009. Office of Scientific and Technical Information (OSTI), May 2011. http://dx.doi.org/10.2172/1013934.

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Duncan, Joanne P. Characterization of Fish Passage Conditions through a Francis Turbine and Regulating Outlet at Cougar Dam, Oregon, Using Sensor Fish, 2009?2010. Office of Scientific and Technical Information (OSTI), May 2011. http://dx.doi.org/10.2172/1015523.

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