离心风机宽频蜗舌消声器的声学模型及应用

Acoustic Model of Cutoff Silencer with Broadband Frequence of Centrifugal Fan and its Application

建立了离心风机宽频蜗舌消声器的声学模型，提出了参数优化方法．解决了以往蜗舌消声器只局限于后弯风机窄频带消声的缺陷，为前弯型风机的降噪提供了有效途径．同时将此方法应用于ＮＹ－２前弯型离心风机降噪，取得了令人满意的效果．

n acoustic model of cutoff silencer with broadband frequence of centrifugal fan is built. The method of optimization of parameters is also presented. It can overcome the disadvantge that the cutoff silence is only applied to control the narrrowband noise in backward fans. Meanwhile it provides an efficient way for foreward centrifugal fan's noise control. Finally the method is applied to control NY-2 foreward centrifugal fan's noise.