中国电机工程学报Issue(32)：70-79,10.
离心风机旋转失速演化过程的气动噪声特性
Aerodynamic Noise Characteristics During Evolution of Rotating Stall in Centrifugal Fan
摘要
Abstract
Based on the throttle valve function and broadband noise model, the aerodynamic noise characteristics of G4-73 backward centrifugal fan under rotating stall was numerically studied. The noise characteristics of centrifugal fan under four different conditions were analyzed, namely designed condition, the occurrence of stall inception, the development of stall inception and the circumferential propagation of stall cells were analyzed. And the influence of rotating stall on the distribution of aerodynamic noise was revealed. The results show that after the occurrence of stall inception, the high noise areas corresponding to vortex noise near the impeller develop along the radial, circumferential and axial directions, and the number of high noise area turn into 1 from 2. During stall, vortex noise accounts for the major part of fan noise, and the high noise areas propagate circumferentially with the same speed of stall cells. Also, the influence mechanism of stall cells and volute on the aerodynamic noise of centrifugal fan is addressed. The research results have great importance to completing the theory system of rotating stall and predicting the occurrence of stall through monitoring noise.关键词
离心风机/旋转失速/气动噪声/数值模拟Key words
centrifugal fan/rotating stall/aerodynamic noise/numerical simulation分类
机械制造引用本文复制引用
张磊,王松岭,胡晨星,孔垂茂..离心风机旋转失速演化过程的气动噪声特性[J].中国电机工程学报,2013,(32):70-79,10.基金项目
中央高校基本科研业务费专项资金资助项目(12QN39)；河北省自然科学基金项目(E2012502016)。@@@@The Fundamental Research Funds for the Central Universities (12QN39) （12QN39）
Project Supported by National Natural Science Foundation of Hebei Province (E2012502016)． （E2012502016）
