摘要
针对目前不同型号的多翼离心风机采用降噪方法的不确定性,提出了一种基于非定常流场的多翼离心风机气动噪声分析方法,不需要直接求解声场却能为多翼离心风机降噪提供有用信息。对风机内部非定常流场进行计算,结合时域和频域方法对流场内静压脉动的强度和频率进行分析,根据声学基本理论,判定主要气动噪声源的位置及噪声类型。用该方法对某多翼离心风机进行计算,实验与理论分析的结果吻合良好。
Aiming at uncertainty of noise reduction methods on different types of multi-blade fan,a new method was proposed to analyse the intensity and location of dominant aerodynamic noise source and the type of the noise.In this method,the numerical solution of aero-acoustie field was avoided. Then,the time-domain and frequency-domain analyses on fluctuating component of static pressure in the flow field were carried out.Based on these numerical results,the intensity and location of dominant aerodynamic noise sour...
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2008年第7期1144-1146,共3页
Journal of Engineering Thermophysics
