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浙江大学学报(工学版)
电气工程     
爪极电机气动噪声数值模拟及机理分析
左曙光, 李悦姣, 吴旭东, 韦开君, 孙罕
1. 同济大学新能源汽车工程中心 上海 201804
2. 上海法雷奥汽车电器系统有限公司 上海 201201
Numerical simulation and mechanism analysis of aerodynamic noise in claw pole alternator
ZUO Shu-guang, LI Yue-jiao, WU Xu-dong, WEI Kai-jun, SUN Han
1. Clean Energy Automotive Engineering Center, Tongji University, Shanghai 201804, China;
2. Shanghai Valeo Automotive Electrical Systems Co. Ltd, Shanghai 201201, China
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摘要:

通过试验与仿真相结合的方法研究爪极电机气动噪声问题.运用数值仿真软件Fluent模拟爪极电机的流场分布以及声源信息.经对比发现,边界元法相比较FW-H模型具有更高的精度,能更好地分析气动噪声产生的机理,因此选用边界元法计算声场大小.在转速为10 000 r/min的工况下,对其各主要阶次噪声的产生机理进行分析,发现影响爪极电机气动噪声特性的主要包括前、后风扇,爪极以及端盖格栅分布等因素,声压较大的阶次主要包括8、11、18、36、10、9、4、12阶等.根据声源表面压力分布,结合流场瞬态计算得到的压力脉动信息可知,8、11阶主要由前、后风扇共同作用产生,18、36阶主要由爪极产生,9、10阶主要由后风扇产生,而4、12阶主要有端盖格栅影响产生.

Abstract:
Aerodynamic noise of the claw pole alternator was studied by a combined method of experiment and simulation. The distribution of flow field and the sound source information of claw pole alternator was calculated by numerical simulation software Fluent. Comparison results show that boundary element method has higher accuracy than FWH-H method and is better for the analysis of generation mechanism of aerodynamic noise. Therefore, boundary element method was employed to calculate the amplitude of sound space. Analysis for aerodynamic noise of the claw pole alternator was discussed based on order analysis under the condition when the rotation rate was 10 000 r/min. It is found that the front and back cooling fan, claw pole and the grille distribution of end cap have influence on the aerodynamic noise. And the main components of aerodynamic noise which have large sound pressure are the 8th, 11st, 18th, 36th, 10th, 9th, 4th and 12nd orders. According to the pressure distribution of the surface on sound source and the pressure fluctuation information obtained by transient flow field calculation, 8th and 11st orders’ noise is generated by the combined effect of front and back fans, 18th and 36th orders’ noise is generated by claw pole, 9th and 10th orders’ noise is generated by back fans and 4th and 12nd orders’ noise is generated by the grille of end cap.
出版日期: 2017-03-01
CLC:  TM 315  
基金资助:

国家自然科学基金资助项目(51375343);国家重大仪器专项资助项目(2012YQ150256)

通讯作者: 吴旭东,男,助理教授. ORCID:0000-0003-1066-6183.     E-mail: wuxudong@tongji.edu.cn
作者简介: 左曙光(1968—),男,教授,从事新能源电动汽车振动噪声研究.ORCID:0000-0002-1085-0258. E-mail:sgzuo@tongji.edu.cn
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左曙光, 李悦姣, 吴旭东, 韦开君, 孙罕. 爪极电机气动噪声数值模拟及机理分析[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008-973X.2017.03.025.

ZUO Shu-guang, LI Yue-jiao, WU Xu-dong, WEI Kai-jun, SUN Han. Numerical simulation and mechanism analysis of aerodynamic noise in claw pole alternator. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008-973X.2017.03.025.

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