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中文摘要：
研究了数值预测风力机气动噪声的一种半经验模型。通过分析风力机噪声产生的机理，该模型对几种不同形式的风力机噪声源进行叠加计算，包括湍流人流噪声、风力机叶片翼型自激励噪声，进而得到风力机全机的声压级和声功率级噪声谱，以及总声压级和总声功率级。为验证半经验模型的有效性，将模型应用于风力机的噪声预测，计算的声功率级及总声功率级与实验测量的声功率级进行比较，计算所得到的结果能够与实验结果基本吻合，表明研究的预测方法是可行的。
英文摘要：
A semi-empirical model of numerically predicting aerodynamic noise from wind turbine is studied in the paper. Based on the generation mechanism of aerodynamic noise from wind turbine, overall sound pressure level and sound power level of wind turbines can be obtained by summing up all the different noise sources which include turbulent inflow noise, airfoil self-noise. To validate the semi-empirical model, it is applied to the prediction of wind turbine noise; comparisons of sound power level and total sound power level are made between the calculated and experimental results, then good agreement can be achieved; it is demonstrated that the predicting method in this paper is feasible.
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