汽车工程

汽车工程 ›› 2018, Vol. 40 ›› Issue (11): 1370-1375.doi: 10.19562/j.chinasae.qcgc.2018.011.017

• • 上一篇    

汽车空调风道气动噪声仿真方法研究*

卿宏军1,2, 刘杰1   

  1. 1.湖南大学机械与运载工程学院,长沙 410082;
    2.常州湖南大学机械装备研究院,常州 213164
  • 收稿日期:2017-07-19 出版日期:2018-11-25 发布日期:2018-11-25
  • 通讯作者: 卿宏军,高级工程师,E-mail:qinghongjun@hnu.edu.cn
  • 基金资助:
    国家自然科学基金(11572115)和江苏省创新能力建设计划(BY2015076)资助

An Investigation into Simulation Method of Aerodynamic Noise in Vehicle HVAC Ducts

Qing Hongjun1,2, Liu Jie1   

  1. 1.School of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082;
    2.CZ-HNU Institute of Machinery Equipment, Changzhou 213164
  • Received:2017-07-19 Online:2018-11-25 Published:2018-11-25

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摘要： 为寻求汽车空调风道气动噪声一种高效高精度的仿真方法,基于德国整车企业联合发布的标准风道模型,对比研究了声类比法、直接模拟法和联合仿真分析法的优劣,并重点分析了声源面对声类比法精度的影响。首先,采用RNG湍流模型与SST k-ω DES模型分别对其稳态流场与瞬态流场进行求解,然后采用声类比法、直接模拟法和联合仿真法分别求解远场辐射噪声问题,仿真与试验结果表明:RNG湍流模型捕捉的风道内时均流场特征与PIV测量结果基本吻合;SST k-ω DES模型求解的风道内壁面脉动压力频谱仿真值与试验值基本一致;而在常用的几种仿真方法中,以出风口处环绕射流的可穿透面为声源面的声类比法求解精度最优。

关键词: 汽车空调风道, 气动噪声, 湍流, 精度

Abstract: In order to find an efficient and high accuracy simulation method for the aerodynamic noise in vehicle HVAC ducts, three commonly-used methods, i.e. acoustic analogy, direct simulation and co-simulation analysis methods are compared and the effects of sound source surface on the accuracy of acoustic analogy method are emphatically analyzed, based on the standard HVAC duct model co-issued by German vehicle manufacturers Audi, BMW, Daimler, Porsche and Volkswagen. Firstly, RNG turbulence model and SST k-ω DES model are adopted to solve the steady state and transient flow field respectively. Then, the acoustic analogy, direct simulation and co-simulation methods are used to calculate far field radiation noise respectively. The results of simulation and test show that the time-averaged characteristics of flow-field in HVAC duct obtained with RNG turbulence model are overall agree with PIV measurement data and the fluctuated pressure spectra on duct wall surfaces simulated by SST k-ω DES model are basically consistent with test results. Among commonly-used simulation methods, the acoustic analogy method with the penetrable surface surrounding the jet turbulence at duct outlet as sound source surface has the highest accuracy

Key words: vehicle HVAC ducts, aerodynamic noise, turbulence, accuracy