本文以M.J.Lighthill 速度八次方定律为依据,从理论上导出了压缩机空气动力噪声声功率的计算式;对影响它的因素进行了分析,指出压缩机的空气动力噪声主要取决气阀的喷注湍流噪声;降低压缩机空气动力噪声的原则是小雷诺数R_e 原则,降噪的重点是气阀的喷注湍流噪声,降噪的有效措施是减小气阀马赫数M_v。 In this paper, MJLighthill’s eighth-order law of speed as the basis, the theoretical derivation of the compressor aerodynamic noise power calculation formula; the factors that affect it were analyzed, pointed out that the compressor aerodynamic noise mainly depends on the valve spray The principle of reducing the aerodynamic noise of compressors is the principle of small Reynolds number R_e. The focus of noise reduction is the injection turbulence noise of the valve. The effective measure of noise reduction is to reduce the valve Mach number M_v.