风雨场条件下汽车乘员舱气动噪声数值模拟
Numerical Simulation of Aerodynamic Noise in Vehicle Occupant Compartment in Wind-Rain Field
宗轶琦 1陶海 1沈辉 1杨易 2罗泽敏3
作者信息
- 1. 扬州大学机械工程学院 江苏省扬州市 225127
- 2. 湖南大学机械与运载工程学院 湖南省长沙市 410082
- 3. 广州汽车集团股份有限公司汽车工程研究院 广东省广州市 516434
- 折叠
摘要
本研究以某汽车为研究对象,基于数值模拟探讨不同降雨量工况下的汽车乘员舱气动噪声声压级水平.采用Realizable k-ε/LES湍流模型来模拟无雨时的单相流流场,再添加离散相模型(DPM)来模拟有雨时的两相流流场,以声类比(FW-H)方法获得了不同降雨量下车身表面各子系统的1/3倍频程平均输入激励,采用混合有限元-统计能量分析(FE-SEA)方法获得了驾驶员耳旁气动噪声声压级水平.仿真结果表明:在20-1000Hz频段内,有雨工况下的驾驶员耳旁的声压级在各中心频率处都低于无雨工况,小雨工况和中雨工况下的驾驶员耳旁总声压级较为接近,大雨工况下的驾驶员耳旁总声压级最低.
Abstract
This study takes a car as the research object,and based on numerical simulation,discusses the sound pressure level of aerodynamic noise in the passenger compartment of the car under different rainfall conditions.The Realizable k-ε/LES turbulence model is used to simulate the single-phase flow field in the absence of rain,and discrete DPM is used to simulate the two-phase flow field in the presence of rain.The average input excitation of 1/3 octave of each subsystem on the body surface under different rainfall is obtained by using the FW-H method,and the sound pressure level of aerodynamic noise near the driver's ear is obtained by using the hybrid FE-SEA method.The simulation results show that in the 20-1000Hz frequency band,the sound pressure level at the driver's ear under the rainy condition is lower than that under the rainless condition at all central frequencies,the overall sound pressure level at the driver's ear under the light rain condition and the moderate rain condition is relatively close,and the overall sound pressure level at the driver's ear under the heavy rain condition is the lowest.
关键词
气液两相流/乘员舱气动噪声/Realizable/k-ε/LES/离散相模型/有限元-统计能量分析法/数值模拟Key words
gas-liquid two-phase flow/aerodynamic noise of passenger compartment/Realizable k-ε/LES/DPM/FE-SEA/numerical simulation引用本文复制引用
基金项目
国家自然科学基金(51875186)
国家自然科学基金(51975197)
出版年
2023
NETL
NSTL
维普
万方数据