流体机械

2021, v.49;No.594(12) 86-94

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汽车空调离心风机噪声的检测与优化
Detection and optimization of vibration noise of centrifugal fan for automobile air conditioning

李明,侯高林,束磊,韦长华,马纯强
LI Ming,HOU Gaolin,SHU Lei,WEI Changhua,MA Chunqiang

摘要(Abstract):

为满足人们对汽车内环境舒适性的高要求,解决某汽车空调离心风机噪声对舒适性的影响,针对离心风机在高转速225 Hz处的异响,利用有限元对离心风机的气动噪声和机械噪声进行仿真分析。研究结果表明:造成风机异响的主要原因是扇叶区域的气动噪声,内部流域最大噪声达到82.076 dB,最终对法兰添加深度0.5~2 mm,直径5 mm,间隔7~20 mm的凹槽,有效稳定了扇叶区域气流,消除了异响。
In order to meet people's high requirements for the comfort of the car's internal environment and solve the impact of the noise of a certain car's air-conditioning centrifugal fan on the comfort,the finite element method was used to simulate and analyze the aerodynamic noise and mechanical noise.The research results show that the main cause for the abnormal noise of the fan was the aerodynamic noise in the fan blade area.The maximum noise in the internal flow domain reached 82.076 dB.Finally,grooves with a depth of 0.5~2 mm,a diameter of 5 mm and a spacing of 7~20 mm were added to the flange,which effectively stabilized the airflow in the fan blade area and eliminated abnormal noise.

关键词(KeyWords): 离心风机;汽车空调;气动噪声;机械噪声
centrifugal fan;automotive air conditioning;aerodynamic noise;mechanical noise

Abstract:

Keywords:

基金项目(Foundation): 吉林省科技厅技术攻关项目(20190302120GX)

作者(Author): 李明,侯高林,束磊,韦长华,马纯强
LI Ming,HOU Gaolin,SHU Lei,WEI Changhua,MA Chunqiang

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