汽车空调的气动噪声分析与降噪方案设计  

Aerodynamic noise analysis and noise reduction scheme design of vehicle air-conditioning

作　　者：李春花[1] 徐鹏[1] 赵玉垒 Li Chunhua;Xu Peng;Zhao Yulei(Great Wall Motor Co.,Ltd.,Hebei Automobile Technology Research Center)

机构地区：[1]长城汽车股份有限公司,河北省汽车工程技术研究中心

出　　处：《制冷与空调》2020年第3期45-49,共5页Refrigeration and Air-Conditioning

摘　　要：利用数值仿真和试验相结合的方法,开展在研车型空调系统气动噪声的研究。运用宽频噪声源模型和计算气动声学方法(CAA),对某汽车空调系统的气动噪声进行数值模拟,得到空调内部的噪声源分布情况,仿真和试验的频谱变化趋势比较吻合,风量最大偏差为3.5%。给出优化风道型面、改变蜗舌形状、风道包裹吸声棉等降噪措施。The aerodynamic noise of the air-conditioning system of the research vehicle is studied by combining numerical simulation with experiment.The broadband noise source model and computational aeroacoustic method(CAA)are used to simulate the aerodynamic noise of a vehicle air-conditioning system.The distribution of noise sources in the air-conditioning system is obtained.The trends of spectrum variation between simulation and test are in good agreement.The maximum deviation of airflow is 3.5%.The noise reduction measures of optimizing the air duct shape,changing the structure of volute tongue,wrapping sound-absorbing cotton in the air duct are given.

关 键 词：汽车空调 噪声 仿真和试验 降噪 

分 类 号：TB6[一般工业技术—制冷工程]