汽车涡轮增压器同步谐波噪声仿真与优化  

Simulation optimization of synchronous harmonic noise in automobile turbocharger

作　　者：凌旭 黄守辉 肖芝 刘敏 LING Xu;HUANG Shouhui;XIAO Zhi;LIU Min(Hunan Chemical Vocational Technology College,Zhuzhou 412000,China;Geely Automobile Research Institute,Ningbo 315336,China;Scattered Automobile Technology Co.,Ltd.,Shanghai 201800,China)

机构地区：[1]湖南化工职业技术学院,株洲412000 [2]吉利汽车研究总院,宁波315336 [3]拾音汽车科技有限公司,上海201800

出　　处：《应用声学》2021年第2期220-226,共7页Journal of Applied Acoustics

基　　金：湖南省教育厅科学研究项目(19C0640)。

摘　　要：针对增压发动机急加速急减速时产生的增压器同步谐波噪声问题,该文通过噪声仿真技术进行分析与优化。首先,分析该噪声的特征与传播路径;其次,建立流场仿真模型。利用剪切应力输运湍流模型与分离涡流模拟湍流模型对增压器进行稳态与非稳态瞬态流场分析,提取非稳态流场的叶轮与压气机流道表面的偶极子声源;最后,建立噪声传播模型,计算该增压器压气机的进气口声场分布。通过理论分析与试验相结合的方法,优化叶轮轮缘与压气机壳体的配合型线,将该增压器噪声的阶次峰值最大降低约15.3 dB(A),消除了同步谐波噪声,且对发动机性能几乎无影响。该噪声的解决方法可以为压气机气动噪声优化提供有价值的参考。In order to study synchronous harmonic noise of turbocharger caused by rapid acceleration and deceleration of engine,this paper analyzes and optimizes the noise simulation technology.Firstly,the characteristics and propagation path of synchronous harmonic noise were analyzed.Secondly,the flow field simulation model was established.Shear stress transport(SST)turbulence model and detached eddy simulation(DES)turbulence model were used to analyze the steady and unsteady transient flow field of compressor,and the dipole sound source on the flow channel surface of impeller and compressor was extracted in the unsteady flow field.Finally,noise propagation model was established,and inlet sound field distribution of compressor simulations was implemented.With the theoretical analysis and experimental method,it shows that the peak of the impeller order noise was reduced by about 15.3 dB(A)and eliminated synchronous harmonic noise by optimization of fit profile between impeller flange and housing.Besides,it almost has no effect on the engine performance.This study enriches the methods of research on optimization of compressor’s aerodynamic noise and provides a useful reference for others.

关 键 词：内燃机 涡轮增压 气动噪声仿真 谐波噪声 声类比 

分 类 号：TK464[动力工程及工程热物理—动力机械及工程]