车用爪极发电机的气动噪声优化  

Aerodynamic noise optimization of vehicle claw-pole generator

作　　者：黄泰明[1] 李伟平[2] 胡涛涛 岳万昊 纪念洲 李域邦 HUANG Tai-ming;LI Wei-ping;HU Tao-tao;YUE Wan-hao;JI Nian-zhou;LI Yu-bang(School of Mechanical Engineering,Hunan Institute of Science and Technology,Yueyang 414006,China;State Key Laboratory for Advanced Design and Manufacture of Automobile Body,Hunan University,Changsha 410082,China;School of Materials Science and Engineering,Central South University,Changsha 410083,China)

机构地区：[1]湖南理工学院机械工程学院,湖南岳阳414006 [2]湖南大学汽车车身先进设计制造国家重点实验室,长沙410082 [3]中南大学材料科学与工程学院,长沙410083

出　　处：《吉林大学学报（工学版）》2022年第10期2244-2255,共12页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(51976055);湖南省自然科学基金项目(2019JJ40103);湖南省教育厅青年项目(18B359).

摘　　要：针对某型号车用爪极发电机在高转速工况下阶次气动噪声特性明显的问题,设计噪声测试实验获得主要阶次噪声,建立流场和声场数值仿真模型,分别对前、后风扇扇叶的压力分布、定子及转子的压力和声功率分布进行分析,研究不同部位对爪极发电机气动噪声的影响。通过矢量合成法对风扇扇叶分布角度进行了优化,对优化后的风扇扇叶分别进行仿真验证和装机试验,验证爪极发电机气动噪声优化效果。试验结果表明,优化后爪极发电机在整个转速范围内的8、12阶次的噪声平均减小量均达到了2.5 dB。Aiming at the problem that a certain type of claw-pole generator has obvious order aerodynamic noise characteristics under high-speed conditions,a noise test experiment is designed to obtain the main order noise,and the finite element software is used to establish a numerical simulation model of the flow field and sound field.The pressure distribution of the front and rear fan blades,the pressure and sound power distribution of the stator and rotor are analyzed,and the influence of different parts on the aerodynamic noise of the claw-pole generator is studied.The fan blade distribution angle was optimized by the vector synthesis method,and the simulation and test are established for the optimized fan blade to verify the aerodynamic noise optimization effect of the claw-pole generator.Experimental results show that the average noise reduction of the 8th and 12th order of the optimized claw pole generator in the entire speed range has reached 2.5 dB.

关 键 词：车辆工程 气动噪声 爪极发电机 矢量合成法 

分 类 号：U463.63[机械工程—车辆工程]