离心风机气动噪声降噪方法研究综述与分析

A Summarization and Analysis on Noise Reduction Methods for Aerodynamic Noise of Centrifugal Fan

根据离心风机气动噪声较高的特点,总结了近十余年一些典型的控制气动噪声的方法,并按照声源和传递路径两类降噪方法进行分类,包括非常规蜗舌、改变叶轮形式、吸声蜗壳以及进出口加消声器等几种,最后根据其降噪效果进行了分析,得出了一些对比结论。

This paper expounds the noise reduction methods to the aerodynamic noise of centrifugal fan through introducing two types of noise reduction methods. According to aerodynamic noise features of cen- trifugal fan a high, the author summed up some of the typical control methods of aerodynamic noise in the past decade. Two types of noise reduction methods which include unconventional volute tongue, changing the impeller in the form, arid adding scroll acoustic muffler import and export are classified by sound source and transmission path. Finally, according to the analysis of its noise reduction effect, the au- thor draws some comparative conclusions.