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| A fully free vortex wake model of aerodynamic calculation for wind turbine |
| Received:May 07, 2012 Revised:September 10, 2012 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201306012 |
| KeyWord:wind turbine fully free vortex wake dummy period adaptive relaxation |
| Author | Institution |
| 许波峰 |
南京航空航天大学 江苏省风力机设计高技术研究重点实验室, 南京 |
| 王同光 |
南京航空航天大学 江苏省风力机设计高技术研究重点实验室, 南京 |
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| Abstract: |
| A fully free vortex wake model of flow field and aerodynamic performance for wind turbine is presented.The dummy period concept is used to improve the convergence speed and stability of wake iterations with an introduction of the adaptive relaxation.The wake structure,the aerodynamic performance and loads of wind turbine are predicted by the present model and compared with the experiment results.The adaptive relaxation factor method can reduce the computational overhead especially at the high tip speed ratios.The fully free vortex wake model can accurately predict the flow field structure including wake expansion and the developing process from generation to dissipation of blade tip and root vortices.The rotor torque agrees well with the experiment data.As for blade load distribution,the calculation compares well with experiment at low wind speeds but diverges at high wind speeds,indicating that an appropriate stall model is required for accurate prediction at high speeds. |