为减少空调室外机用低压轴流风轮叶片的颤振,改善音质,降低噪音和电机功率。本文设计了尾缘凹陷新型三叶轴流风轮,同时除对前缘局部加厚处理外,对叶片其他区域整体减薄。文中采用Navier-Stokes方程对新风轮和原风轮的内流及气动特性进行了三维数值模拟,同时对两者的流量压力曲线和噪音频谱进行了实验研究。研究表明:对轴流风轮叶片尾缘进行凹陷设计,对前缘以外的区域减薄设计,能够减轻风轮重量,降低电机负荷同时减弱转子尾迹;对叶轮前缘进行局部加厚处理可以减小叶尖颤振,降低叶片旋转频率峰值噪音,从整体上降低噪音,改善音质。 In order to reduce the flutter of the low-pressure axial-flow wind turbine blades of the air conditioner outdoor unit, the sound quality is improved, the noise and the motor power are reduced. In this paper, a new type of trilobite axial flow rotor with trailing edge depression was designed. In addition to thickening the leading edge locally, the other areas of the blade were thinned as a whole. In this paper, Navier-Stokes equations are used to simulate the three-dimensional numerical simulation of the inflow and aerodynamic characteristics of the new and original wind turbines. At the same time, the flow pressure curves and the noise spectrum of the two are investigated experimentally. The research shows that the design of the trailing edge of the axial wind turbine blade is concave and the thinning design of the area beyond the leading edge can reduce the rotor weight and reduce the motor load while reducing the rotor wake. The thickening of the leading edge of the impeller can be reduced Small tip flutter, reduce the peak rotation frequency of leaf noise, reduce the overall noise, improve sound quality.