In Froude-scaled model tests of floating wind turbines, if the Reynolds number is higher than the critical Reynolds number, the scale effect can be neglected. In this paper, seven scale factors (1:100, 1:50, 1:30, 1:20, 1:15, 1:10 and 1:3) were used to calculate the rotor thrust coefficients of the NREL offshore 5-MW baseline wind turbine model blades. XFOIL software was used to analyze the lift and drag coefficient curves of the six airfoils. The thrust coefficients were obtained and compared with those of the prototype applying the Blade Element Momentum Theory. It can be concluded that the critical Reynolds number is approximately 2×105 (with a scale factor of 1:15). Lower Reynolds number model blades will show unfavorable aerodynamic performance in the model test.
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The Eleventh ISOPE Pacific/Asia Offshore Mechanics Symposium
October 12–14, 2014
Shanghai, China
ISBN:
978-1-880653-90-6
Analysis of the Critical Reynolds Number for Floating Wind Turbine Blades
Yong-sheng Zhao;
Yong-sheng Zhao
Shanghai Jiao Tong University
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Yan-ping He
Yan-ping He
Shanghai Jiao Tong University
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Paper presented at the The Eleventh ISOPE Pacific/Asia Offshore Mechanics Symposium, Shanghai, China, October 2014.
Paper Number:
ISOPE-P-14-075
Published:
October 12 2014
Citation
Du, Wei-kang, Zhao, Yong-sheng, Liu, Hua, and Yan-ping He. "Analysis of the Critical Reynolds Number for Floating Wind Turbine Blades." Paper presented at the The Eleventh ISOPE Pacific/Asia Offshore Mechanics Symposium, Shanghai, China, October 2014.
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