汽车用冷却水泵噪声特性的数值计算研究  

Numerical Calculation Research on Noise Characteristics of Automotive Cooling Water Pump

作　　者：夏豪 尹明德[1] 肖杰 王立成 Xia Hao;Yin Mingde;Xiao Jie

机构地区：[1]南京航空航天大学机电学院 [2]南京胜捷电机制造有限公司

出　　处：《工程机械》2024年第5期53-60,I0014,共9页Construction Machinery and Equipment

摘　　要：运用计算流体力学和计算声学相结合的方法对某种汽车电子冷却水泵进行不同工况下的非定常流场和声场的数值计算,在此基础上研究水泵的声源特性及声辐射特性。流场计算基于CFD方法采用SST k-omega湍流模型进行非定常数值计算,得到水泵蜗壳及叶轮壁面的动态压力信息,并将声源信息以CGNS格式导出。对流场动态压力信息进行FFT和无量纲化分析来得到水泵壁面的压力脉动特性。声场计算运用LIGHTHILL声类比方法,耦合声学有限元和结构有限元求解水泵内外场噪声,得到不同工况下的蜗壳及叶轮偶极子噪声的声源特性和声辐射特性,为后续水泵的减振降噪工作奠定基础。A method combining computational fluid dynamics and computational acoustics is used to numerically calculate the unsteady flow field and sound field of an automotive electronic cooling water pump under different working conditions,and on this basis,the sound source characteristics and sound radiation characteristics of the pump are studied.The flow field calculation is based on the CFD method,the SST k-omega turbulence model is used for unsteady numerical calculation to obtain the dynamic pressure information of pump volute and impeller wall,and the sound source information is exported in CGNS format.The dynamic pressure information of the flow field is subjected to FFT and dimensionless analysis to obtain the pressure pulsation characteristics of the pump wall.For sound field calculation,the LIGHTHILL acoustic analogy method is used and coupled with acoustic finite element and structural finite element to solve the internal and external noise of the pump and to obtain the sound source characteristics and sound radiation characteristics of dipole noise of the volute and impeller under different working conditions,which lays a foundation for the subsequent vibration damping and noise reduction of the pump.

关 键 词：电子水泵 流体动力噪声 压力脉动 数值模拟 

分 类 号：U464.138.1[机械工程—车辆工程]