典型文献
Step-by-Step Numerical Prediction of Aerodynamic Noise Generated by High Speed Trains
文献摘要：
In this paper,the unsteady flow around a high-speed train is numerically simulated by detached eddy simulation method(DES),and the far-field noise is predicted using the Ffowcs Williams-Hawkings(FW-H)acoustic model.The reliability of the numerical calculation is verified by wind tunnel experiments.The superposition relationship between the far-field radiated noise of the local aerodynamic noise sources of the high-speed train and the whole noise source is analyzed.Since the aerodynamic noise of high-speed trains is derived from its different components,a stepwise calculation method is proposed to predict the aerodynamic noise of high-speed trains.The results show that the local noise sources of high-speed trains and the whole noise source conform to the principle of sound source energy superposition.Using the head,middle and tail cars of the high-speed train as noise sources,different numerical mod-els are established to obtain the far-field radiated noise of each aerodynamic noise source.The far-field total noise of high-speed trains is predicted using sound source superposition.A step-by-step calculation of each local aerody-namic noise source is used to obtain the superimposed value of the far-field noise.This is consistent with the far-field noise of the whole train model's aerodynamic noise.The averaged sound pressure level of the far-field longitudinal noise measurement points differs by 1.92 dBA.The step-by-step numerical prediction method of aerodynamic noise of high-speed trains can provide a reference for the numerical prediction of aerodynamic noise generated by long marshalling high-speed trains.
文献关键词：
中图分类号：
作者姓名：
Tian Li;Deng Qin;Ning Zhou;Weihua Zhang
作者机构：
State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,China
文献出处：
引用格式：
[1]Tian Li;Deng Qin;Ning Zhou;Weihua Zhang-.Step-by-Step Numerical Prediction of Aerodynamic Noise Generated by High Speed Trains)[J].中国机械工程学报,2022(02):251-264
A类：
marshalling
B类：
Step,by,Numerical,Prediction,Aerodynamic,Noise,Generated,High,Speed,Trains,In,this,paper,unsteady,flow,around,high,speed,numerically,simulated,detached,eddy,simulation,method,DES,far,field,noise,predicted,using,Ffowcs,Williams,Hawkings,FW,acoustic,model,reliability,calculation,verified,wind,tunnel,experiments,superposition,relationship,between,radiated,local,aerodynamic,sources,whole,analyzed,Since,trains,derived,from,its,different,components,stepwise,proposed,results,show,that,conform,principle,sound,energy,Using,head,middle,tail,cars,els,are,established,obtain,each,total,used,superimposed,value,This,consistent,averaged,pressure,level,longitudinal,measurement,points,differs,dBA,prediction,can,provide,reference,generated
AB值：
0.417466
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