摘要
通过分离涡模拟(DES)进行整车外流场的三维瞬态仿真,得到车身表面压力脉动,并采用FW-H声学模型对气动噪声进行仿真分析。通过与类后视镜气动噪声试验数据相比较,验证了仿真的准确性。对有、无后视镜工况下,后视镜区域瞬态流场、车身表面压力脉动、侧窗监测点声压级进行比较,揭示了后视镜区域气动噪声产生机理,为降低汽车气动噪声提供技术支持。
The body surface pressure fluctuation was obtained through the three-dimensional transient simulation of the vehicle outflow field using Detached Eddy Simulation(DES).Aerodynamic noise was simulated with FW-H acoustic model.By comparing with the experimental data of rear view mirror,the accuracy of the simulation was verified.The rear view mirror condition was compared with the no rear view mirror condition about the transient flow field,surface pressure fluctuation,sound pressure level of the side window monitoring points.The mechanisms of generating the aerodynamic noise in the rear view mirror were revealed,which could provide technical supports for reducing automotive aerodynamic noise.
作者
余文杰
韩强
张琦
郑四发
Yu Wenjie;Han Qiang;Zhang Qi;Zheng Sifa(Suzhou Automotive Research Institute,Tsinghua University,Suzhou 215134)
出处
《汽车技术》
CSCD
北大核心
2018年第4期9-14,共6页
Automobile Technology
基金
江苏省自然科学基金项目(BK20140373)
关键词
分离涡模拟
后视镜
气动噪声
压力脉动
瞬态流场
DES
Rear view mirror
Aerodynamic noise
Pressure fluctuation
Transient flow field
