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Journal articles on the topic 'Improved blade grid'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Balalaiev, Anton, Kateryna Balalaieva, Maryna Pikul та Grygoriy Golembiyevskyy. "Власні частоти коливань композитної решітчастої дворядної лопатки вентилятора ТРДД". Aerospace Technic and Technology, № 4 (29 серпня 2024): 49–57. http://dx.doi.org/10.32620/aktt.2024.4.06.

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The subject of this study is the natural oscillations of a grid tandem fan blade of a turbofan engine. The object of this study was a tandem grid fan blade. The purpose of this work was to assess the influence of the material on the natural frequencies of the oscillations of a grid tandem fan blade of a turbofan engine. The following tasks were set and solved in the work: conducting a modal analysis of the natural oscillations of a grid tandem fan blade made of a composite material and titanium alloy; construction of a Campbell diagram for a grid tandem fan blade made of a composite material a

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2

Chen, Ze, Yuhang Ju, Chuanzhi Sun, Yinchu Wang, Yongmeng Liu, and Jiubin Tan. "3D Shape Measurement of Aeroengine Blade Based on Fringe Projection Profilometer Improved by Multi-Layer Concentric Ring Calibration." Sensors 24, no. 9 (2024): 2810. http://dx.doi.org/10.3390/s24092810.

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The precision requirements for aeroengine blade machining are exceedingly stringent. This study aims to improve the accuracy of existing aeroengine blade measurement methods while achieving comprehensive measurement. Therefore, this study proposes a new concentric ring calibration method and designs a multi-layer concentric ring calibration plate. The effectiveness of this calibration method was verified through actual testing of standard ball gauges. Compared with the checkerboard-grid calibration method, the average deviation of the multilayer concentric ring calibration method for measuring

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3

BALIKOĞLU, Fatih, Tayfur Kerem Demircioğlu, and Ali IŞIKTAŞ. "Mechanical Properties Of Sandwich Composites Used For Aerofoil Shell Structures Of Wind Turbine Blade." ICONTECH INTERNATIONAL JOURNAL 5, no. 1 (2021): 26–37. http://dx.doi.org/10.46291/icontechvol5iss1pp26-37.

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The grid-scored foams contribute significantly to the overall mechanical properties of the sandwich structures, such as aerofoil shell structure of wind turbine blades which are subjected to different loads under operating conditions. The goal of the present paper is to examine the four-point bending, flatwise and edgewise compression and in-plane shear behaviour of sandwich panels composed of composite face sheets of E-glass/ bisphenol-A epoxy resin and plain and grid-scored PVC foams. The four-point bending failure load of the grid-scored foamed sandwich beams increased by 28.1% compared to

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Zhao, Jie, Li Wang, Dichen Liu, et al. "Dynamic Model of Kaplan Turbine Regulating System Suitable for Power System Analysis." Mathematical Problems in Engineering 2015 (2015): 1–12. http://dx.doi.org/10.1155/2015/294523.

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Accurate modeling of Kaplan turbine regulating system is of great significance for grid security and stability analysis. In this paper, Kaplan turbine regulating system model is divided into the governor system model, the blade control system model, and the turbine and water diversion system model. The Kaplan turbine has its particularity, and the on-cam relationship between the wicket gate opening and the runner blade angle under a certain water head on the whole range was obtained by high-order curve fitting method. Progressively the linearized Kaplan turbine model, improved ideal Kaplan tur

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5

Shahsavari, A., and M. Nili-Ahmadabadi. "Investigation of an innovative non-free vortex aerodynamic procedure to design a single-stage transonic compressor." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 232, no. 11 (2017): 2132–43. http://dx.doi.org/10.1177/0954410017710272.

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This paper presents an innovative design method for a transonic compressor based on the radial equilibrium theory by means of increasing blade loading. Firstly, the rotor blade of a transonic compressor is redesigned based on the constant spanwise de-Haller number and diffusion. The design method leads to an unconventional increased axial velocity distribution in tip section, which originates from non-uniform enthalpy distribution assumption. A code is applied to extract the compressor meridional plane and blade-to-blade geometry containing rotor and stator in order to design the blade three-d

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6

Zha, Ruosi, and Kai Wang. "Numerical simulation of flow-induced noise generation and propagation of a floating offshore wind turbine with prescribed pitch motion." Journal of the Acoustical Society of America 154, no. 4_supplement (2023): A283. http://dx.doi.org/10.1121/10.0023533.

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It is important to evaluate flow-induced noise emitted due to operations of floating offshore wind turbines since noise pollution can damage the environments of seabirds and aquatic species. This paper studies the aerodynamic and aeroacoustic performance of a laboratory three-blade wind turbine model with an airfoil profile of NREL S826. The wind turbine blade rotation motion is coupled with the prescribed pitch motion of the floating offshore wind power platform. The influence of prescribed pitch motions on the noise generated by wind turbine blades and noise propagation was discussed. Adopti

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7

Honda, Hironori, Tadashi Kanzaka, Nobuhito Oka, Tom Verstraete, Arnaud Châtel, and Lasse Müller. "Performance improvement of centrifugal compressors for automotive turbochargers using adjoint method." Journal of Physics: Conference Series 2217, no. 1 (2022): 012010. http://dx.doi.org/10.1088/1742-6596/2217/1/012010.

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Abstract A sensitivity calculation using adjoint method has a feature of low calculation cost because sensitivity information of all computational grid points can be calculated by only one numerical simulation. From this feature, it has been utilized as a calculation method of sensitivity information for a gradient-based optimization and this optimization procedure with adjoint method can be one of suitable ways for centrifugal compressor impeller which has a lot of design parameters such as meridional shape, blade angle and thickness. During the gradient-based optimization, mesh morphing, whi

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8

Yang, Xiaopei, Boyan Jiang, Jun Wang, et al. "Multi-objective optimization of dual-arc blades in a squirrel-cage fan using modified non-dominated sorting genetic algorithm." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 234, no. 8 (2020): 1053–68. http://dx.doi.org/10.1177/0957650919898983.

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In this study, a dual-arc profile parameterized by four geometric variables was designed to replace the original single-arc profile of a squirrel-cage fan used in a range hood, in order to improve the efficiency of the entire machine and the fan pressure. A modified Non-dominated Sorting Genetic algorithm coupled with a three-dimensional Reynolds-averaged Navier–Stokes computation is applied to search the optimum blade shape. Moreover, a relatively coarse but proven reliable grid model is employed to accelerate the optimization process, and a dynamic crowding distance is applied to improve the

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9

Pan, Lin, Ze Zhu, Haodong Xiao, and Leichong Wang. "Numerical Analysis and Parameter Optimization of J-Shaped Blade on Offshore Vertical Axis Wind Turbine." Energies 14, no. 19 (2021): 6426. http://dx.doi.org/10.3390/en14196426.

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In this study, the performance of offshore wind turbines at low tip speed ratio (TSR) is studied using computational fluid dynamics (CFD), and the performance of offshore wind turbines at low tip speed ratio (TSR) is improved by revising the blade structure. First, the parameters of vertical axis offshore wind turbine are designed based on the compactness iteration, a CFD simulation model is established, and the turbulence model is selected through simulation analysis to verify the independence of grid and time step. Compared with previous experimental results, it is shown that the two-dimensi

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10

Matthews, Douglas R., and Nicole L. Key. "Considerations for High-Fidelity Modeling of Unsteady Flows in a Multistage Axial Compressor." International Journal of Turbomachinery, Propulsion and Power 10, no. 1 (2025): 5. https://doi.org/10.3390/ijtpp10010005.

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This paper presents the development and validation of a high-fidelity, unsteady, computational fluid dynamics (CFD) model of the Purdue 3-Stage Axial Research Compressor. A grid convergence study assesses the spatial discretization accuracy of the single-passage, steady-state computational model. Additionally, the periodic-unsteady convergence of the unsteady signals of a multiple-passage transient blade row model was explored. Computational predictions were compared with experimental measurements to evaluate the efficacy of the various modeling decisions. Notably, transient blade row model ca

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11

Zouheyr, Dekali, Baghli Lotfi, Lubin Thierry, and Boumediene Abdelmadjid. "Grid Side Inverter Control for a Grid Connected Synchronous Generator Based Wind Turbine Experimental Emulator." European Journal of Electrical Engineering 23, no. 1 (2021): 1–7. http://dx.doi.org/10.18280/ejee.230101.

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This paper describes the real time implementation and control of a wind energy conversion chain emulator based on a synchronous generator (SG) using a full-scale power converter configuration. The proposed structure consists of the mechanical coupling of two 1.5 kW machines, a DC motor which emulates the static-dynamic behaviors of a three-blade wind turbine with a horizontal axis including an ideal gearbox, and a synchronous generator that ensures the electromechanical conversion and manages the different operating modes. The aim of the first part in this work is the design and the implementa

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12

Sun, Yan, Yongjie Shi, and Guohua Xu. "Application of High-Order WENO Scheme in the CFD/FW–H Method to Predict Helicopter Rotor Blade–Vortex Interaction Tonal Noise." Aerospace 9, no. 4 (2022): 196. http://dx.doi.org/10.3390/aerospace9040196.

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The accurate prediction of helicopter rotor blade–vortex interaction (BVI) noise is challenging. This paper presents an implementation of the seventh-order improved weighted essentially non-oscillatory (WENO-Z) scheme for predicting rotor BVI noise using a high-resolution numerical method based on the Reynolds-averaged Navier–Stokes and the Ffowcs Williams–Hawkings equations. The seventh-order improved WENO-Z scheme is utilized to minimize the inherent numerical dissipation of the reconstruction method in the monotone upstream-centered scheme for conservation laws (MUSCL), thereby improving th

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Grinderslev, Christian, Felix Houtin-Mongrolle, Niels Nørmark Sørensen, et al. "Forced-motion simulations of vortex-induced vibrations of wind turbine blades – a study of sensitivities." Wind Energy Science 8, no. 10 (2023): 1625–38. http://dx.doi.org/10.5194/wes-8-1625-2023.

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Abstract. Vortex-induced vibrations on wind turbine blades are a complex phenomenon not predictable by standard engineering models. For this reason, higher-fidelity computational fluid dynamics (CFD) methods are needed. However, the term CFD covers a broad range of fidelities, and this study investigates which choices have to be made when wanting to capture the vortex-induced vibration (VIV) phenomenon to a satisfying degree. The method studied is the so-called forced-motion (FM) approach, where the structural motion is imposed on the CFD blade surface through mode shape assumptions rather tha

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14

Li, Chen Liang. "Algorithm Implementation and Method of Virtual Meshing Division of Complex Blade." Applied Mechanics and Materials 543-547 (March 2014): 3577–80. http://dx.doi.org/10.4028/www.scientific.net/amm.543-547.3577.

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This paper uses the ORACLE database system and Ballista testing tools to set up the virtual simulation platform of computer network, and to establish the mathematical model and algorithm of network virtual reality. In order to validate the validity and reliability of the designed model and algorithm in this paper, we carry out the numerical simulated experiment with NI cDAQ chassis, four channels data acquisition card and B-PLC network card and other hardware equipments, which has successfully divided the virtual grid of the complex blade, and from the system test, we can find that the hardwar

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15

Dubchak, Lesia, Anatoliy Sachenko, Yevgeniy Bodyanskiy, et al. "Adaptive Neuro-Fuzzy System for Detection of Wind Turbine Blade Defects." Energies 17, no. 24 (2024): 6456. https://doi.org/10.3390/en17246456.

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Wind turbines are the most frequently used objects of renewable energy today. However, issues that arise during their operation can greatly affect their effectiveness. Blade erosion, cracks, and other defects can slash turbine performance while also forcing maintenance costs to soar. Modern defect detection applications have significant computing resources needed for training and insufficient accuracy. The goal of this study is to develop the improved adaptive neuro-fuzzy inference system (ANFIS) for wind turbine defect detection, which will reduce computing resources and increase its accuracy

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16

Sakamoto, Luke, Tomohiro Fukui, and Koji Morinishi. "Blade Dimension Optimization and Performance Analysis of the 2-D Ugrinsky Wind Turbine." Energies 15, no. 7 (2022): 2478. http://dx.doi.org/10.3390/en15072478.

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With the increasing focus on renewable energy, there is a need to improve the efficiency of vertical-axis wind turbines (VAWTs). The Ugrinsky wind turbine is a type of VAWT, but there are few studies on this turbine. Previous studies have shown that the maximum power coefficient of the Ugrinsky wind turbine reaches 0.170, which is 54.5% higher than that of the Savonius type (0.110), and this turbine maintains a high power coefficient over a wide range of tip speed ratios (TSR). In this study, the dimensions of the two semicircles of the Ugrinsky wind turbine were further optimized to obtain a

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17

Arpit, Pawar. "Performance Characteristics in Draft Tube - A Review." Journal of Advanced Mechanical Sciences 1, no. 3 (2022): 88–92. https://doi.org/10.5281/zenodo.7032505.

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The draft tube elbow was modelled using the fundamental geometry of GAMM Francis turbine. Its purpose was to design a draft tube with improved hydrodynamic performance This was accomplished by integrating unfasten resource and commercialized technologies to optimize and update the shape and CFD grid, and analyzing pressure retrieval and mechanical power wounded next to draft tube intend through Computational Fluid Dynamics (CFD). A technique was used to evaluate the functioning of an elbow draft tube. According to CFD, an 18.8° inclined angle has been the best way in blocking the productio

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18

Spijkerman, D., S. T. Navalkar, B. Solberg, and S. P. Mulders. "Norm-Optimal Iterative Learning Control for Wind Turbines During Grid Faults." Journal of Physics: Conference Series 2767, no. 3 (2024): 032002. http://dx.doi.org/10.1088/1742-6596/2767/3/032002.

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Abstract Due to the increasing share of (offshore) wind turbines, more stringent requirements on power quality have been established. Importantly, the low-voltage ride-through grid requirement states that a wind turbine must remain connected to the electrical grid after a short intermittent grid fault. In the industry mainly gain-scheduled PID-controllers are used to mitigate the effects of grid faults on turbine operation, whereas more advanced solutions have been proposed in the literature such as model predictive control or multiple parallel PI-controllers. Remarkably, all controller implem

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19

Zakieldeen, Elhassan, Yi Tang, and Yang Li. "Proposed Control Method of Doubly Fed Induction Generator Rotor Side Converter Based on System Frequency Regulation." Applied Mechanics and Materials 548-549 (April 2014): 806–14. http://dx.doi.org/10.4028/www.scientific.net/amm.548-549.806.

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With the more penetration of wind power based on the DFIG wind turbine to the grid, there is increasing significance for controlling output power in order to meet power system requirements and to participate the frequency regulation in the power grid. This paper is presented proposed control method of DFIG implemented in the RSC using system frequency coordinated control. In this study, the GSC is controlled by using modified vector control method while the RSC is controlled by adjusting the rotor dq-axis currents. The quadrature axis current controls by using the active power generating from

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20

Añez, Javier, Hakim Hamdani, Julien Reveillon, Benjamin Duret, and Francois-Xavier Demoulin. "Sensitivity Analysis of an Unsteady Flow Around a Pitching Airfoil." OpenFOAM® Journal 3 (November 20, 2023): 177–99. http://dx.doi.org/10.51560/ofj.v3.81.

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Various ways to control the loads and thus the output of the wind turbine by pitching the blades and by controlling the rotational speed already exist. However, adverse pressure gradient leading to flow separation at the trailing edge, with relatively high angles of attack (AOA) due to blade-pitching motion, largely affects the airfoil aerodynamic performance. This work presents the results of a numerical study of the unsteady flow around a pitching FFA-W3-301 airfoil at a Reynolds 1.6 × 106 using OpenFOAM®, as obtained by first performing 2D Unsteady Reynolds-Averaged Navier- Stokes (URANS) s

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21

Place, J. M. M., M. A. Howard, and N. A. Cumpsty. "Simulating the Multistage Environment for Single-Stage Compressor Experiments." Journal of Turbomachinery 118, no. 4 (1996): 706–16. http://dx.doi.org/10.1115/1.2840926.

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The performance of a single-stage low-speed compressor has been measured both before and after the introduction of certain features of the multistage flow environment. The aim is to make the single-stage rig more appropriate for developing design rules for multistage compressors. End-wall blockage was generated by teeth on the hub and casing upstream of the rotor. A grid fitted upstream produced free-stream turbulence at rotor inlet typical of multistage machines and raised stage efficiency by 1.8 percent at the design point. The potential field that would be generated by blade rows downstream

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22

Ling, Yu, Zhenlan Dou, Qiang Gao, and Xu Cai. "Improvement of the Low-Voltage Ride-through Capability of Doubly Fed Induction Generator Wind Turbines." Wind Engineering 36, no. 5 (2012): 535–51. http://dx.doi.org/10.1260/0309-524x.36.5.535.

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So far, active crowbars are a preferred technique for doubly fed induction generator (DFIG) wind turbines, which is used to protect the power converter against over-current and undesirably high dc link voltage during voltage dip. However, its main drawbacks are that (1) the DFIG absorbs reactive power from the grid during grid voltage dips, (2) the crowbar activation increases the acceleration of the rotor and so, deteriorates the dynamic stability of DFIG, and (3) the control is not flexible for long-time voltage sags. In the paper, three different initiating logic control methods of crowbar

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23

Copenhaver, W. W., E. R. Mayhew, C. Hah, and A. R. Wadia. "The Effect of Tip Clearance on a Swept Transonic Compressor Rotor." Journal of Turbomachinery 118, no. 2 (1996): 230–39. http://dx.doi.org/10.1115/1.2836630.

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An experimental and numerical investigation of detailed tip clearance flow structures and their effects on the aerodynamic performance of a modern low-aspect-ratio, high-throughflow, axial transonic fan is presented. Rotor flow fields were investigated at two clearance levels experimentally, at tip clearance to tip blade chord ratios of 0.27 and 1.87 percent, and at four clearance levels numerically, at ratios of zero, 0.27, 1.0, and 1.87 percent. The numerical method seems to calculate the rotor aerodynamics well, with some disagreement in loss calculation, which might be improved with improv

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24

SHEVKUN, NIKOLAY A. "Heat recovery plant: ways to improve energy efficiency." Agricultural Engineering, no. 6 (2023): 4–9. http://dx.doi.org/10.26897/2687-1149-2023-6-4-9.

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One of the ways to reduce the cost of heating production facilities in animal husbandry is the use of regenerative heat recovery plants. However, the existing designs of heat exchangers have a number of design flaws affecting their functionality, in particular, the uneven distribution of the air flow over the surface of a heat exchanger. This, in turn, does not provide for a more complete utilization of exhaust air heat. Using the example of a recuperative heat recovery unit UT‑3000, the authors consider the possibility of retrofitting it with an aerodynamic grid to evenly distribute the exhau

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25

H Y Du, T H Yan, S L Liu, B He, and S Gao. "Fluid-Solid Coupling Analysis of the Propeller and Optimization of Boss Cap Fin Parameters." International Journal of Maritime Engineering 166, A1 (2024): 11–30. http://dx.doi.org/10.5750/ijme.v166ia1.1205.

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In order to ensure the accuracy of propeller modelling and hydrodynamic performance prediction, first of all, compared with atlas modelling and OpenProp modelling, it is pointed out that the characteristics of the blade model established by PropCad are more complete. Secondly, through the analysis and discussion of the computational domain distribution, grid independence verification and turbulence model, the CFD calculation model is established systematically. Thirdly, the hydrodynamic analysis of AU5-80 propeller is carried out under different advance ratios, and the simulation results are i

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26

Alattar, Alhassan H., S. I. Selem, Hamid M. B. Metwally, et al. "Performance Enhancement of Micro Grid System with SMES Storage System Based on Mine Blast Optimization Algorithm." Energies 12, no. 16 (2019): 3110. http://dx.doi.org/10.3390/en12163110.

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Frequency control represents a critically significant issue for the enhancement of the dynamic performance of isolated micro grids. The micro grid system studied here was a wind–diesel system. A new and robust optimization technique called the mine blast algorithm (MBA) was designed for tuning the PID (proportional–integral–differential) gains of the blade pitch controller of the wind turbine side and the gains of the superconducting magnetic energy storage (SMES) controller. SMES was implemented to release and absorb active power quickly in order to achieve a balance between generation and lo

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27

Melzer, Steffen, Tim Müller, Stephan Schepeler, Tobias Kalkkuhl, and Romuald Skoda. "Experimental and numerical investigation of the transient characteristics and volute casing wall pressure fluctuations of a single-blade pump." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 233, no. 2 (2018): 280–91. http://dx.doi.org/10.1177/0954408918780524.

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In contrast to conventional multiblade centrifugal pumps, single-blade pumps are characterized by a significant fluctuation of head and highly transient and circumferentially nonuniform flow field even in the best-efficiency point. For a contribution to a better understanding of the flow field and an improvement of numerical methods, a combined experimental and numerical study is performed with special emphasis on the analysis of the transient pressure field. In an open test rig, piezoresistive pressure sensors are utilized for the measurement of transient in- and outflow conditions and the vo

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28

Wang, Kuilin, Xiaomin Meng, Tao Wang, et al. "The Optimization of the Rear Guide Vane of a Bulb Tubular Pump Based on Orthogonal Tests." Processes 13, no. 1 (2025): 264. https://doi.org/10.3390/pr13010264.

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Bulb tubular pumps have been widely used in hydraulic engineering because of their compact structure, easy maintenance, high adaptability, and other characteristics. In this paper, the performance optimization of the bulb tubular pump in the South-to-North water diversion project is studied, as well as the influence of the design of the rear guide vane structure on the hydraulic efficiency of the pump. This study takes a certain type of bulb tubular pump as its research object, optimizing the rear guide vane. Firstly, the accuracy of the numerical simulation method is verified using grid conve

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Borisova, Irena, Olya Stoilova, Nevena Manolova, and Iliya Rashkov. "Modulating the Mechanical Properties of Electrospun PHB/PCL Materials by Using Different Types of Collectors and Heat Sealing." Polymers 12, no. 3 (2020): 693. http://dx.doi.org/10.3390/polym12030693.

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Two-component fibrous materials based on poly(3-hydroxybutyrate) (PHB, Tm = 160 °C) and poly(ε-caprolactone) (PCL, Tm = 60 °C) were successfully fabricated by dual-jet electrospinning of their separate spinning solutions. The desired alignment of the fibers that compose PHB/PCL mats was achieved by using three types of rotating collectors—drum (smooth), blade and grid. Additional fiber alignment in the direction of collector rotation was achieved by rotating at 2200 rpm. Moreover, the selected concentration of PCL spinning solution resulted in fibers with spindle-like defects along their lengt

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Zhou, Zhihua, Shaowen Chen, and Songtao Wang. "Aerodynamic Optimization of Winglet-Cavity Tip in an Axial High Pressure Turbine Stage." International Journal of Turbo & Jet-Engines 37, no. 4 (2020): 399–411. http://dx.doi.org/10.1515/tjj-2017-0038.

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AbstractA new geometry parametric method of winglet-cavity tip has been introduced in the optimization procedure based on three-dimensional steady CFD numerical calculation and analysis. Firstly, the reliability of numerical method and grid independency are studied. Then an aerodynamic optimization is performed in an unshrouded axial high pressure turbine with winglet-cavity tip. The optimum winglet-cavity tip has higher turbine stage efficiency and smaller tip leakage mass flow rate than the cavity tip and flat tip. Compared with the results of cavity tip, the effects of the optimum winglet-c

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Wang, Bingzhen, Wei Ke, Yuanfei Zhang, and Yunqi Duan. "Research on an All-Flow Velocity Control Strategy for a 120 kW Variable-Pitch Horizontal Axis Tidal Current Turbine." Journal of Marine Science and Engineering 10, no. 11 (2022): 1578. http://dx.doi.org/10.3390/jmse10111578.

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Horizontal-axis tidal current turbines have considerable potential to harvest renewable energy from ocean tides. The pitch control system is a critical part of variable-pitch tidal turbines. Existing control strategies for tidal turbines mainly rely on flow measurement devices to obtain tidal velocities, which are costly and subject to many limitations in practical applications, making them unsuitable for small off-grid tidal turbines. In this paper, we propose a pitch control strategy for a 120 kW horizontal-axis tidal current turbine based on the output power of the generator. The torque of

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Wang, Xiao Lin, Ding Hua Yang, Gen Sheng Yang, et al. "Air Flow Simulation in High-Pressure Fan with Splitter Blade." Advanced Materials Research 805-806 (September 2013): 1730–35. http://dx.doi.org/10.4028/www.scientific.net/amr.805-806.1730.

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In the process of fans design, splitter blades could be adopted in the middle of rotator to improve the performance of fan. In order to understand the flow pattern in the high-pressure centrifugal blower of 9-26type with splitter blade thoroughly, computational fluid dynamics Fluent is applied and the three dimensional air flows in the fan is numerically simulated and analyzed. The calculating results showed that under the same condition, the flux of the fan was improved 5%approximately and the mean total pressure at outlet of the fan was improved 10% because of the splitter blade, the length

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Huo, Pengyu, Liang Pan, Ziwen Wang, Guiyu Cao, Christopher Vogel, and Kun Xu. "GPU-enabled high-order gas-kinetic scheme for actuator line model simulations of wind turbine wakes." Journal of Physics: Conference Series 3016, no. 1 (2025): 012017. https://doi.org/10.1088/1742-6596/3016/1/012017.

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Abstract For the first time, we integrate the actuator line model (ALM) into a fourth-order gas-kinetic scheme (GKS) to accurately simulate wind turbine wakes. We first extend the GKS to the simulation of weakly compressible flows within a well-developed two-stage fourth-order framework. The ALM is included as an external body force term in the momentum equation for the GKS. The in-house second-order and fourth-order GKS with ALM is implemented on Graphics Processing Units (GPU) to leverage their parallel computing capabilities for wake turbulence simulation. The NREL 5 MW reference wind turbi

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Cong, Cong. "Decentralized control of vibrations in wind turbines using multiple active tuned mass dampers with stroke constraint." Advances in Mechanical Engineering 10, no. 12 (2018): 168781401881675. http://dx.doi.org/10.1177/1687814018816756.

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This article is devoted to the study of the vibration control for blades and tower in a wind turbine. Based on the Euler–Lagrangian method, a multi-body dynamic model including three blades with distributed parameter, tower, and their coupling is obtained. Multi active tuned mass dampers have been utilizing as damping devices. Therefore, the dynamics of the tuned mass dampers are also considered in modeling. The influence of extreme wind, and grid dynamics on the vibration of the blade was analyzed. Moreover, the nonlinearity induced by space constraints, which impact on vibration control, is

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Verma, Shalini, Akshoy Ranjan Paul, Anuj Jain, and Firoz Alam. "Numerical investigation of stall characteristics for winglet blade of a horizontal axis wind turbine." E3S Web of Conferences 321 (2021): 03004. http://dx.doi.org/10.1051/e3sconf/202132103004.

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Wind energy is one of the renewable energy resources which is clean and sustainable energy and the wind turbine is used for harnessing energy from the wind. The blades are the key components of a wind turbine to convert wind energy into rotational energy. Recently, wingtip devices are used in the blades of horizontal axis wind turbine (HAWT), which decreases the vortex and drag, while increases the lift and thereby improve the performance of the turbine. In the present study, a winglet is used at the tip of an NREL phase VI wind turbine blade. Solidworks, Pointwise, and Ansys-Fluent are used f

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Tarelin, Anatolii O., and Iryna Ye Annopolska. "Effective Formalization of Design Processes as a Key Factor in Achieving Optimal Solutions When Creating the Final Stages of Steam Turbines." Journal of Mechanical Engineering 28, no. 1 (2025): 42–54. https://doi.org/10.15407/pmach2025.01.042.

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Based on the existing experience in designing and constructing of the last stage blades of large (critical) length and the analysis of literary sources, the features of the methodology for formalizing the processes of creating such blades, taking into account their specific features (large radial dimensions, suboptimal relative grid steps =0.25–1.0, high static and dynamic loads), are established. A parametric formalization of the main modeling dependencies of the processes on which the creation of rotor blades is based is given: the thermo-gas-dynamic process, blade design and the technologic

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Liu, Lei, and Baigang Mi. "Lift–Thrust Integrated Ducted-Grid Fusion Configuration Design for a Ducted Fan Tail-Sitter UAV." Applied Sciences 15, no. 14 (2025): 7687. https://doi.org/10.3390/app15147687.

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A new lift enhancement scheme is designed for the cruise flight process of a tail-sitter UAV (Unmanned Aerial Vehicle), proposing a fusion configuration with embedded grid channels on the duct wall. The low pressure zone at the lip of the duct is induced to expand through the grid channels, forming a significant force component difference with the non-grid side, thereby generating significant lift effects for the propeller of the ducted fan during level flight. Taking a ducted fan system as an example, a design method for embedding grids into the ducted wall is established. By using the slidin

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Zheng, Yun, Xiubo Jin, and Hui Yang. "Effects of Asymmetric Vane Pitch on Reducing Low-Engine-Order Forced Response of a Turbine Stage." Aerospace 9, no. 11 (2022): 694. http://dx.doi.org/10.3390/aerospace9110694.

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Asymmetric vane pitch is a key technique to suppress the forced response of downstream rotor blades. To address the problem of low-engine-order (LEO) excitation with high amplitude under an asymmetric configuration (half-and-half layout) widely recognized in the previous literature, we first apply the in-house computational fluid dynamics code Hybrid Grid Aeroelasticity Environment to perform full-annulus unsteady aeroelasticity simulations of the turbine stage, comparing the resonance response of rotor blades on different asymmetric configurations and analyzing the flow field at the vane exit

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D., Ramirez, Rubio-Clemente A., and E. Chica. "Design and numerical analysis of an efficient H-Darrieus vertical-axis hydrokinetic turbine." Journal of Mechanical Engineering and Sciences 13, no. 4 (2019): 6036–58. http://dx.doi.org/10.15282/jmes.13.4.2019.21.0477.

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Hydrokinetic turbines are one of the technological alternatives to generate and supply electricity for rural communities isolated from the national electrical grid with almost zero emission. The Darrieus turbine is one of the options that can be used as a hydrokinetic turbine due to its high power coefficient (Cp) and easy manufacture. In the present work, the design and hydrodynamic analysis of a Darrieus vertical-axis hydrokinetic turbine of 500 W was carried out. A free stream velocity of 1.5 m/s was used for the design of the blades. The diameter (D) and blade length (H) of the turbine wer

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Capurso, Tommaso, Michele Stefanizzi, Marco Torresi, et al. "How to Improve the Performance Prediction of a Pump as Turbine by Considering the Slip Phenomenon." Proceedings 2, no. 11 (2018): 683. http://dx.doi.org/10.3390/proceedings2110683.

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Nowadays Pumps working as Turbines (PaT) are devices widely used to perform energy recovery in hydraulic grids, thus improving their overall efficiency, and to build small hydropower plants. In this work, a centrifugal pump has been numerically investigated in turbine operating mode by means of the open-source CFD code OpenFOAM with emphasis on the flow field at the runner outlet. Due to the reduced number of blades in a PaT, the mean outlet relative velocity angle differs from the blade angle. In order to account for this phenomenon, the slip factor is introduced. The slip factor is investiga

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Хижняк, Михаил Владимирович, Екатерина Викторовна Дорошенко та Вячеслав Юрьевич Усенко. "ВИБІР І ОБҐРУНТУВАННЯ МЕТОДУ ГЕНЕРАЦІЇ СІТКИ ДЛЯ МОДЕЛЮВАННЯ ТЕЧІЇ У ВЕНТИЛЯТОРІ ГАЗОТУРБІННОГО ДВИГУНА". Aerospace technic and technology, № 8 (31 серпня 2020): 34–40. http://dx.doi.org/10.32620/aktt.2020.8.05.

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The study of flow in aircraft gas turbine engines is one of the main components for the creation of new compressors and fans with improved aerodynamic, acoustic, strength, overall weight, and other characteristics. In modern scientific research, the methods of the physical experiment are used at the final stages of flow studies in blade machines. a numerical experiment is used in the early stages. An obvious advantage of the numerical experiment is the ability to study many variants of constructions under different input and boundary conditions in a short period. However, a numerical experimen

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Lou, Yuan, Guangjie Peng, and Hao Chang. "Numerical simulation and thrust performance optimization of water jet thruster." Journal of Physics: Conference Series 2707, no. 1 (2024): 012113. http://dx.doi.org/10.1088/1742-6596/2707/1/012113.

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Abstract With the increasing use of water jet thrusters on ships, the demand for increasing their thrust performance and efficiency is also increasing. The impeller, as the core power component, is the key to the thrust of the water jet thruster. Therefore, to obtain a more energy-saving, low-carbon, and higher-thrust water jet thruster, this paper conducts an in-depth study on the impeller of the water jet thruster. The hexahedral grid is used to divide the internal flow field of the water jet thruster into structured grids, and the RANS equation and k-ε turbulence model are used to simulate

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Chang, Tai-Lin, Shun-Feng Tsai, and Chun-Lung Chen. "Optimal Design of Novel Blade Profile for Savonius Wind Turbines." Energies 14, no. 12 (2021): 3484. http://dx.doi.org/10.3390/en14123484.

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Since the affirming of global warming, most wind energy projects have focused on the large-scale Horizontal Axis Wind Turbines (HAWTs). In recent years, the fast-growing wind energy sector and the demand for smarter grids have led to the use of Vertical Axis Wind Turbines (VAWTs) for decentralized energy generation systems, both in urban and remote rural areas. The goals of this study are to improve the Savonius-type VAWT’s efficiency and oscillation. The main concept is to redesign a Novel Blade profile using the Taguchi Robust Design Method and the ANSYS-Fluent simulation package. The convex

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Todăriţă, Elida-Tomița. "Leadership Style Determination according to Robert Blake and Jane Mouton’s Managerial Grid." International conference KNOWLEDGE-BASED ORGANIZATION 27, no. 1 (2021): 241–46. http://dx.doi.org/10.2478/kbo-2021-0037.

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Abstract The organizational development assume the unconditional support of the leadership. Over time, the researchers have developed four major behavioural theories of leadership: the trait theory, behavioural theory of leadership, situational leadership theory and integrative leadership theory. These focus on the work of leaders, what they do, what they say and what they communicate across organizational boundaries. Over time, these theories have been adapted, developed and improved according to the main objectives of the organization and each leader. The researchers in the field were those

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Murray, Robynne E., Andrew Simms, Aidan Bharath, et al. "Toward the Instrumentation and Data Acquisition of a Tidal Turbine in Real Site Conditions." Energies 16, no. 3 (2023): 1255. http://dx.doi.org/10.3390/en16031255.

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The National Renewable Energy Laboratory manufactured, instrumented, and deployed thermoplastic composite blades and a data acquisition system (NDAQ) on one of Verdant Power’s Gen5d 5 m diameter tidal turbines in New York’s East River. The thermoplastic blades had internal strain gages, and the NDAQ was a stand-alone system for monitoring and recording the strain and angular position of the blades. The turbine with thermoplastic blades operated and produced power successfully for 3 months, contributing energy to the New York City electric grid. The NDAQ hardware, instrumentation, and structure

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Town, Jason, and Cengiz Camci. "A Time Efficient Adaptive Gridding Approach and Improved Calibrations in Five-Hole Probe Measurements." International Journal of Rotating Machinery 2015 (2015): 1–14. http://dx.doi.org/10.1155/2015/376967.

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Five-Hole Probes (FHP), being a dependable and accurate aerodynamic tool, are an excellent choice for measuring three-dimensional flow fields in turbomachinery. To improve spatial resolution, a subminiature FHP with a diameter of 1.68 mm is employed. High length to diameter ratio of the tubing and manual pitch and yaw calibration cause increased uncertainty. A new FHP calibrator is designed and built to reduce the uncertainty by precise, computer controlled movements and reduced calibration time. The calibrated FHP is then placed downstream of the nozzle guide vane (NGV) assembly of a low-spee

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Eggert, F., J. Rafaelsen, and P. P. Camus. "Investigation of detector efficiency with EDS in SEM with the aim to improve standardless quantitative results." IOP Conference Series: Materials Science and Engineering 1324, no. 1 (2025): 012006. https://doi.org/10.1088/1757-899x/1324/1/012006.

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Abstract We have found deviations in in net-count measurement comparisons with EDS detectors equipped with different X-ray entrance windows that cannot be explained by the theoretical assumed and synchrotron measurements verified window transmissions. This work presents the results with systematic simultaneous measurements, which were performed with two EDS SDD systems on one SEM to verify this effect. The two detectors were equipped with a polymer window (Moxtek AP3) and the next generation Si3N4-window (Amptek C2), respectively. A possible explanation of measured detector-efficiency deviatio

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Aref, Pooneh, Mehdi Ghoreyshi, Adam Jirasek, and Jürgen Seidel. "Application of the HPCMP CREATETM-AV Kestrel to an Integrated Propeller Prediction." Aerospace 7, no. 12 (2020): 177. http://dx.doi.org/10.3390/aerospace7120177.

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This article presents the results of a computational investigation of an integrated propeller test case using the HPCMP CREATETM-AV Kestrel simulation tools. There is a renewed interest in propeller-driven aircraft for unmanned aerial vehicles, electric aircraft, and flying taxies. Computational resources can significantly accelerate the generation of aerodynamic models for these vehicles and reduce the development cost if the prediction tools can accurately predict the aircraft/propeller aerodynamic interactions. Unfortunately, limited propeller experimental data are available to validate com

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Laghridat, Hammadi, Ahmed Essadki, Maha Annoukoubi, and Tamou Nasser. "A Novel Adaptive Active Disturbance Rejection Control Strategy to Improve the Stability and Robustness for a Wind Turbine Using a Doubly Fed Induction Generator." Journal of Electrical and Computer Engineering 2020 (March 30, 2020): 1–14. http://dx.doi.org/10.1155/2020/9847628.

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A novel and robust active disturbance rejection control (ADRC) strategy for variable speed wind turbine systems using a doubly fed induction generator (DFIG) is presented in this paper. The DFIG is directly connected to the main utility grid by stator, and its rotor is connected through a back-to-back three phase power converter (AC/DC/AC). Due to the acoustic nature of wind and to ensure capturing maximum energy, a control strategy to extract the available maximum power from the wind turbine by using a maximum power point tracking (MPPT) algorithm is presented. Moreover, a pitch actuator syst

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Jain, Nishan, Luis Bravo, Dokyun Kim, et al. "Massively Parallel Large Eddy Simulation of Rotating Turbomachinery for Variable Speed Gas Turbine Engine Operation." Energies 13, no. 3 (2020): 703. http://dx.doi.org/10.3390/en13030703.

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Gas turbine engines are required to operate at both design and off-design conditions that can lead to strongly unsteady flow-fields and aerodynamic losses severely impacting performance. Addressing this problem requires effective use of computational fluid dynamics tools and emerging models that resolve the large scale fields in detail while accurately modeling the under-resolved scale dynamics. The objective of the current study is to conduct massively parallel large eddy simulations (LES) of rotating turbomachinery that handle the near-wall dynamics using accurate wall models at relevant ope

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