本文着重研究喷流噪声机理及工程计算方法。通过实验研究了声功率与喷流速度的关系,表明在Mα>0.4时Lighthill方程和Lilley方程均与实验数据吻合,可分别使用。而Mα<0.4时,均偏差较大,通过本文实验表明,若改为6次方关系较为恰当。文章同时对喷流噪声指向性、谱特性进行了分析。最后对一种引射消声器进行了发展性研究,获得在135dB噪声条件下,降噪17dB的效果。 This paper focuses on jet noise mechanism and engineering calculation method. Experimental study of the relationship between the sound power and jet velocity shows that the Lighthill equation and the Lilley equation agree well with the experimental data for Mα> 0.4 and can be used separately. However, when Mα <0.4, the average deviation is large. The experiments show that it is more appropriate to change to the sixth power. At the same time, the article analyzes the directivity and spectral characteristics of jet noise. Finally, a developed muffler was developed to obtain the effect of noise reduction of 17dB under the noise of 135dB.