轴向间隙对对旋风机噪声特性影响的试验研究

Experimental Study of Axial Clearance Influences on the Noise Characteristics of Contra-rotating Fan

本文在大量试验测试的基础上,考察了对旋风机噪声频谱曲线和A声级随轴向间隙的变化情况,详细分析了旋转噪声和涡流噪声随轴向间隙的变化规律,为对旋风机的降噪研究提供一些参考依据。

Based on the test study of the noise characteristics of some type of counter-rotating axial fan,the noise spectra curves and the variation curve of A-weighted sound level corresponding to various axial clearances are acquired.The variable regulations that the revolution and eddy noise change as the axial clearance varies are analyzed in detail.It provides a useful reference to decrease contra-rotating axial fan＇s noise.