scholarly journals Numerical Studies Of the Upstream Flow Field Around A Horizontal Axis Wind Turbine

2015 ◽  
Author(s):  
Hamidreza Abedi ◽  
Lars Davidson ◽  
Spyros Voutsinas
Keyword(s):  
Flow Field ◽  
Wind Turbine ◽  
Horizontal Axis ◽  
Horizontal Axis Wind Turbine ◽  
Numerical Studies ◽  
Upstream Flow

Small Horizontal Axis Wind Turbine: Analytical Blade Design and Comparison With RANS-Prediction and First Experimental Data

2013 ◽  
Author(s):  
Tom Gerhard ◽  
Michael Sturm ◽  
Thomas H. Carolus
Keyword(s):  
Experimental Data ◽  
Flow Field ◽  
Wind Turbine ◽  
Horizontal Axis ◽  
Analytical Models ◽  
Power Coefficient ◽  
Analysis Tool ◽  
Computational Domain ◽  
Horizontal Axis Wind Turbine ◽  
Data Set

State-of-the-art wind turbine performance prediction is mainly based on semi-analytical models, incorporating blade element momentum (BEM) analysis and empirical models. Full numerical simulation methods can yield the performance of a wind turbine without empirical assumptions. Inherent difficulties are the large computational domain required to capture all effects of the unbounded ambient flow field and the fact that the boundary layer on the blade may be transitional. A modified turbine design method in terms of the velocity triangles, Euler’s turbine equation and BEM is developed. Lift and drag coefficients are obtained from XFOIL, an open source 2D design and analysis tool for subcritical airfoils. A 3 m diameter horizontal axis wind turbine rotor was designed and manufactured. The flow field is predicted by means of a Reynolds-averaged Navier-Stokes simulation. Two turbulence models were utilized: (i) a standard k-ω-SST model, (ii) a laminar/turbulent transition model. The manufactured turbine is placed on the rooftop of the University of Siegen. Three wind anemometers and wind direction sensors are arranged around the turbine. The torque is derived from electric power and the rotational speed via a calibrated grid-connected generator. The agreement between the analytically and CFD-predicted kinematic quantities up- and downstream of the rotor disc is quite satisfactory. However, the blade section drag to lift ratio and hence the power coefficient vary with the turbulence model chosen. Moreover, the experimentally determined power coefficient is considerably lower as predicted by all methods. However, this conclusion is somewhat preliminary since the existing experimental data set needs to be extended.

Visualization of the flow field and aerodynamic force on a Horizontal Axis Wind Turbine in turbulent inflows

Energy ◽  
2016 ◽  
Vol 111 ◽  
pp. 57-67 ◽  
Author(s):  
Qing'an Li ◽  
Yasunari Kamada ◽  
Takao Maeda ◽  
Junsuke Murata ◽  
Yusuke Nishida
Keyword(s):  
Flow Field ◽  
Wind Turbine ◽  
Aerodynamic Force ◽  
Horizontal Axis ◽  
Horizontal Axis Wind Turbine

Change of the flow field around a horizontal axis wind turbine by the plasma airflow control

2016 ◽  
Vol 2016 (0) ◽  
pp. 0615
Author(s):  
Kenshiro MATSUOKA ◽  
Yasunari KAMADA ◽  
Takao MAEDA ◽  
Atsushi FUJIWARA ◽  
Motofumi TANAKA
Keyword(s):  
Flow Field ◽  
Wind Turbine ◽  
Horizontal Axis ◽  
Horizontal Axis Wind Turbine

Study on flow field analysis for rotor wake of horizontal axis wind turbine

2018 ◽  
Vol 2018.67 (0) ◽  
pp. 328
Author(s):  
Junnya OZAKI ◽  
Tatsuya URANO ◽  
Kazuki KUBOTA ◽  
Yutaka HASEGAWA ◽  
Tatsuo USHIJIMA
Keyword(s):  
Flow Field ◽  
Wind Turbine ◽  
Horizontal Axis ◽  
Field Analysis ◽  
Horizontal Axis Wind Turbine ◽  
Rotor Wake ◽  
Flow Field Analysis

Experimental and numerical studies on the wake behavior of a horizontal axis wind turbine

2014 ◽  
Vol 128 ◽  
pp. 54-65 ◽  
Author(s):  
Ali M. Abdelsalam ◽  
K. Boopathi ◽  
S. Gomathinayagam ◽  
S.S. Hari Krishnan Kumar ◽  
Velraj Ramalingam
Keyword(s):  
Wind Turbine ◽  
Horizontal Axis ◽  
Horizontal Axis Wind Turbine ◽  
Numerical Studies
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