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| Numerical analysis for the wake zone of large offshore wind turbine |
| Received:January 10, 2011 Revised:June 18, 2011 |
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| DOI：10.7511/jslx20123006 |
| KeyWord:offshore wind turbine wake zone k-ε RNG turbulence mode sliding mesh |
| Author | Institution |
| 任年鑫 |
大连理工大学 深海工程研究中心, 大连 |
| 欧进萍 |
大连理工大学 深海工程研究中心, 大连 ;大连理工大学 海岸和近海工程国家重点实验室, 大连 |
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| Abstract: |
| With the rising of the offshore wind farm all over the world,the rated design power and scale of offshore wind farms are tending to be larger and larger.Therefore,the study on the wake effect of the large offshore wind turbine (OWT) is of great importance to the optimal layout of offshore wind farms.In this work,based on Navier-Stocks equations and the RNG k-ε turbulence model,which is very suitable for the rotational fluid flow,the three-dimensional numerical simulations for the aerodynamic performance of the NREL 5MW offshore wind turbine blades and its wake effects on the downstream flow have been done by using advanced sliding mesh technique.The validation of the three-dimensional numerical model has been verified by comparing the numerical output power results under different inlet wind speeds with the correlative NREL design data.On the basis of this model,the distribution characters of the mean velocity in the OWT wake zone under rated inlet wind speed and different rotational speeds have been investigated.Consequently,a series of conclusions have been obtained,which are of great importance for large offshore wind farms. |
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