随着汽车工业的发展和人们对驾驶舒适性要求的不断提高，汽车冷却风扇组件(CFM)离散噪声水平的控制与改善日趋重要.在CFM设计的早期，寻找一种能够快速预测离散噪声的方法有助于设计师缩短设计周期，提高工作效率.为此，提出一种动-静叶片相位调制的组合方法来控制CFM的谐波噪声，即通过控制CFM叶片的角度分布参数来降低CFM噪声频谱中的二次谐波以及三次谐波成分；基于静叶(定子叶片或者支撑筋)阵列的声学百叶窗效应，设计静叶角度分布参数，使CFM噪声频谱中的一次谐波成分进一步降低,从整体上改善CFM的离散噪声水平.通过7叶片风扇分别与6静叶和8静叶的组合对所提出的方法进行实验验证，结果表明其与理论预测结果较为吻合.

With the development of automobile industry and the improvement of people’s requirements for driving comfort, it is increasingly important to control and improve the discrete noise level of the cooling fan module (CFM). In the early stage of CFM design, finding a fast method to predict discrete noise is helpful for designers to shorten design cycle and improve work efficiency. In this paper, a combined method of rotor-stator blade phase modulation is proposed to control the harmonic noise of CFM, i.e., to reduce the second and third harmonic in the CFM noise spectrum by controlling fan blade angle distribution parameter of CFM; Based on the “Venetian blind” theory of stator vanes, its angle distribution parameter is designed to further reduce the first harmonic component in CFM noise spectrum, aiming to improve the CFM discrete noise level. The method is verified by experiments in two combined cases of 7-blade fan, 6-vane and 8-vane respectively. And the experimental results are in good agreement with the theoretical prediction results.