平底后缘风力机翼型气动噪声计算研究

An Effective Method for Predicting Aerodynamic Noise for Wind Turbine Flatback Airfoils

基于二维雷诺平均NS方程,采用SST k-ω湍流模型结合γ-■θt转捩判断方法,对传统尖后缘翼型及修形后的平底后缘翼型进行了粘性绕流数值计算;在此基础上结合Ffowcs Williams-Hawkings(FW-H)声学方程,采用混合方法对平底后缘翼型的气动噪声进行了计算。计算结果和实验结果吻合良好,表明文中方法在平底后缘风力机翼型气动噪声计算方面具有良好的应用前景。

Section 1 of the full paper explains our prediction method mentioned in the title, which we believe is ef- fective and whose core is： using two-dimensional Reynolds-averaged Navier-Stokes equations, we calculate the flow around a conventional sharp trailing edge airfoil and its flatback version employing γ-Reθt transition prediction meth- od based on SST turbulence model; the aerodynamic noise of the flatback airfoil is then computed using hybrid method combining the former CFD results with the Ffowcs Williams-Hawkings （FW-H） equation. Section 2 presents both aerodynamic and acoustic results in Figs. 3 through 9, and analyze most of them, showing preliminarily that the calculated results are in good agreement with experimental data; thus section 2 indicates that our method is suc- cessful for predicting aerodynamic noise for wind turbine flatback airfoils.