离心压气机气动噪声数值预测  

Numerical Prediction of Aerodynamic Noise for Centrifugal Compressor

作　　者：覃玄[1] 姚胜华[1] 

机构地区：[1]湖北汽车工业学院汽车工程学院,湖北十堰442002

出　　处：《湖北汽车工业学院学报》2016年第1期30-33,41,共5页Journal of Hubei University Of Automotive Technology

摘　　要：以CFD软件为平台,计算得到不同工况下离心压气机定常流动特性曲线,验证模型正确性。将定常计算结果作为初场,对不同工况下压气机非定常流场进行数值模拟,获取流场内部声源强度信息。基于间接边界元法,将离心叶轮简化为旋转偶极子,计算离心叶轮辐射声场。结果表明:离心叶轮为压气机主要噪声源,由动静子相互干涉作用产生的离散噪声为主要噪声类型。Based on CFD software, the performance curves of the steady flow were obtained on a centrif-ugal compressor under different conditions, and the validation was confirmed. The steady numerical re-sults were served as initial condition, the unsteady numerical simulation under different conditions wascarried out and the sound source information was then obtained. Based on the indirect boundary ele-ment method, the centrifugal impeller was simplified as the spinning dipole to calculate the radiatedsound field. The results show the centrifugal impeller is the main noise source, the discrete noisecaused by the interference effect between the stator and rotor is the main noise type.

关 键 词：离心叶轮 非定常流动 离散噪声 间接边界元 

分 类 号：TB533.1[理学—物理]