武汉理工大学学报（交通科学与工程版）
武漢理工大學學報（交通科學與工程版）
무한리공대학학보（교통과학여공정판）
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY(TRANSPORTATION SCIENCE & ENGINEERING)
2014年
2期
450-453
,共4页
饶紫微%乔维高%杨松%司豪杰
饒紫微%喬維高%楊鬆%司豪傑
요자미%교유고%양송%사호걸
空气动力%外流场%计算流体动力学%数值模拟
空氣動力%外流場%計算流體動力學%數值模擬
공기동력%외류장%계산류체동역학%수치모의
aerodynamics%flow field%computational fluid dynamics%numerical simulation
将SIMPLE算法与RNG k-ε湍流模型相结合，基于计算流体动力学完成了某车型外部流场的数值仿真。仿真计算的求解区域采用非结构化四面体网格进行离散，以速度进口、压力出口为边界条件，着重对该车型整车、中截面的流线、速度场、压力场及宽频气动噪声的声功率级分布进行了对比分析。仿真结果表明，外流场中沿车身外形的大幅度压力脉动是气动噪声的主要来源之一。
將SIMPLE算法與RNG k-ε湍流模型相結閤，基于計算流體動力學完成瞭某車型外部流場的數值倣真。倣真計算的求解區域採用非結構化四麵體網格進行離散，以速度進口、壓力齣口為邊界條件，著重對該車型整車、中截麵的流線、速度場、壓力場及寬頻氣動譟聲的聲功率級分佈進行瞭對比分析。倣真結果錶明，外流場中沿車身外形的大幅度壓力脈動是氣動譟聲的主要來源之一。
장SIMPLE산법여RNG k-ε단류모형상결합，기우계산류체동역학완성료모차형외부류장적수치방진。방진계산적구해구역채용비결구화사면체망격진행리산，이속도진구、압력출구위변계조건，착중대해차형정차、중절면적류선、속도장、압력장급관빈기동조성적성공솔급분포진행료대비분석。방진결과표명，외류장중연차신외형적대폭도압력맥동시기동조성적주요래원지일。
Numerical simulation of the external airflow around a car has been performed .The SIMPLE method and the RNG k-εturbulent model have been selected to solve the three-dimensional equations . The unstructured grids have been used to discrete the computational domain .Velocity and pressure boundary conditions have been specified to the inlet and the outlet .The distributions of the stream-line ,velocity ,pressure and aerodynamic noise on the car surface have been analyzed .The simulation results show that the pressure fluctuation around the car is the main cause that results in the aerody-namic noise .The simulation results are of important significance to the optimal design and noise con-trol of the car .
