风电叶片低粗糙敏感性厚翼型优化方法研究

基于叶片设计需求,将厚翼型设计点性能随前缘粗糙的敏感性参数化并引入到厚翼型设计中,改进其优化模型;结合翼型几何设计、性能分析以及最优化算法建立厚翼型低粗糙敏感性优化设计方法。通过35%相对厚度翼型案例设计,验证了该方法在实现光滑表面下高气动性能的同时,可有效降低粗糙表面下的性能损失。

OPTIMIZATION METHOD OF THICK WIND TURBINE AIRFOILS WITH LOW SENSITIVITY TO SURFACE ROUGHNESS

According to the blade design requirements, this study considers the stability of the airfoil design performance to the leading-edge roughness and proposes specific indicators to represent its sensitivity, and then improves the optimization model of the thick wind turbine airfoils with low sensitivity to leading-edge surface roughness. Integrated with the airfoil geometrical design method, performance calculation method and the optimization algorithm, an optimization design method to reduce the aerodynamic performance sensitivity to surface roughness is established. A case design of a 35-percent relative thickness airfoil is performed and the results show that the newly proposed method can improve the airfoil design performance under clean surface condition and effectively decrease the loss in the airfoil performance of leading-edge surface roughness.