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| Analysis of vertical axis wind turbine dynamic wake with CFD technology |
| Received:April 02, 2013 Revised:June 01, 2013 |
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| DOI：10.7511/jslx201405022 |
| KeyWord:wake theory vorticity turbulence wind profile power flow |
| Author | Institution |
| 蔡新 |
河海大学 水资源高效利用与工程安全国家工程研究中心, 南京 ;河海大学 力学与材料学院, 南京 |
| 潘盼 |
河海大学 力学与材料学院, 南京 |
| 朱杰 |
河海大学 力学与材料学院, 南京 |
| 顾荣蓉 |
河海大学 力学与材料学院, 南京 |
| 张建新 |
河海大学 力学与材料学院, 南京 |
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| Abstract: |
| The simulation of the vertical axis wind turbine which was designed by McMaster University is conducted under various tip speed ratio with the CFD software,and the results agree well with the wind tunnel experiments.In the near wake,comparing with the turbine with only one blade,the dragged blade tip eddies of the upwind blade in normal running wind turbine influences the downwind blade's aerodynamic characters:not only declines its peak value of the torsion torque,but also delays its occurrence time.The modified wind turbine has equal peak torsion torque value output with normal turbine,but less valley value,and the modified one produces less pushing force parallel to the wind; in the far wake,the wind profile theory was added into the simulation of the 200kW vertical axis wind turbines in the wind farm of Falkenberg,Sweden.The results reveal the upwind wind turbine produced intensive far wake flow in the upper and lower ends of the blades,and the downwind turbine' aerodynamic character was affected in the lower half parts of the blades.Influenced by the far wake in the wind farm,the downwind turbine produces less energy. |
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