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| Effects of near field terms on aerodynamic noise of the vehicle alternator |
| ZHANG Fan1, HUANG Yan1,2, LIU Qi3, HUA Chunrong1,2, YAN Bing1,2,DONG Dawei1,2, ZHENG Dong1,2 |
1. Engineering Research Center of Advanced Driving Energy-saving Technology Ministry of Education, Chengdu 610031, China；
2. School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China；
3. Dongfeng Motor Corporation Technology Center, Wuhan 430056, China |
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Abstract In order to investigate the influence of the near-field term (reflector, end cover and stator) on the aerodynamic noise of the vehicle alternator, this paper studies the aerodynamic noise characteristics of the alternator based on the Lighthill acoustic analogy theory, large eddy simulation (LES) method and boundary element method. The results show that the main orders and amplitudes obtained by the simulation are in good agreement with the experiments, which verifies the correctness of the simulation method, and the order 4, 6, 8, 9, 10 and 12 are the main orders of this type of alternator. the reflection surface has influence on all the main orders, the end cover mainly affects the 10th order, and the stator mainly affects the 6th and 9th order. The reflection has a great influence on the sound pressure level of the left and upper measuring points, the end cover has a great influence on the left and right measuring points, and the stator has almost no influence on each measuring point. The influence of the near-field term on the five-point average total sound pressure level is in the following order: reflector>end cover>stator.
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Received: 26 July 2018
Published: 28 March 2020
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[1] 张亚东, 董大伟, 闫兵,等. 车用交流发电机气动噪声试验研究[J]. 噪声与振动控制, 2014, 34(3):107-110.
ZHANG Yadong, DONG Dawei, YAN Bing,et al. Experiment Study on Aerodynamic Noise of an Automotive Alternator[J]. Noise and Vibration Control, 2014,34(03):107-110+123.
[2]Sang J S, Chung J, Lim B D,et al. Case History: Noise Source Identification of an AutomobileAlternatorby RPM Dependent Noise and VibrationSpectrum Analysis[J]. Noise Control Engineering Journal, 1991, 37(1):31-36(6).
[3]张亚东. 车用交流发电机气动噪声特性分析与降噪研究[D]. 西南交通大学, 2014.
[4] Jeon W H, Rew H S, Kim C J. Aeroacoustic characteristics and noise reduction of a centrifugal fan for a vacuum cleaner[J]. Ksme International Journal, 2004, 18(2):185-192.
[5] 刘敏,董大伟,闫兵,陈清爽,谭喜,杨兵. 车用交流发电机噪声特性及噪声源测试分析[J]. 重庆理工大学学报(自然科学版),2010,24(06):13-17.
LIU Min,DONG Dawei,YAN Bing,et al．Test and analysis of noise characteristics and noise source of vehicle alternator[J].Journal of Chongqing University of Technology: Natural Science, 2010 24( 6) :13 －17
[6] 胡文明. 基于阶次分析的车用交流发电机噪声分析与应用[D].广东工业大学,2013.
[7] 张亚东,董大伟,闫兵,张继业,王媛文. 车用交流发电机气动噪声数值分析[J]. 振动与冲击,2016,35(01):174-182+187.
ZHANG Yadong, DONG Dawei, YAN Bing, et al. Numerical simulation analysis for aerodynamic noise of a vehicle alternator[J].Journal of Vibration and Shock, 2016, 35(1):174-182.
[8] 张亚东,柳琦,闫兵,张继业. 旋转方向对车用交流发电机气动噪声影响分析[J]. 噪声与振动控制,2016,36(02):148-152.
ZHANG Yadong,LIU Qi,YAN Bing,ZHANG Jiye,et al. Analysis of influence of the rotation direction on aerodynamic noise of a vehicle alternator[J]. Noise and Vibration Control, 2016,36(02):148-152.
[9] 柳琦,闫兵,张胜杰,张川. 考虑影响声传播因素的车用交流发电机气动噪声预测[J]. 声学技术,2017,36(04):363-370.
LIU Qi,YAN Bing,ZHANG Shengjie,ZHANG Chuan,et al.Aerodynamic noise prediction of vehicle alternator considering factors affect acoustic propagation[J]. Technical Acoustics, 2017,36(04):363-370.
[10] 惠颖男. 车用交流发电机噪声测试及降噪方法研究[D].西南交通大学,2011.
[11] Hua C, Zhang Y, Dong D,et al.Aerodynamic noise numericalsimulation and noise reduction study on automobile alternator[J]. Journal of Mechanical Science & Technology,2017, 31(5):2047-2055.
[12] 王媛文, 董大伟, 闫兵. 汽车发电机冷却风扇旋转噪声预测方法[J]. 航空动力学报,2015, 30(7):1711-1720.
WANG Yuanwen, DONG Dawei, YAN Bing,et al. Prediction method of vehicle alternator cooling fan rotation noise[J]. Journal of Aerospace Power, 2015, 30(7):1711-1720.
[13] 左曙光, 李悦姣, 吴旭东,等. 爪极电机气动噪声仿真及机理分析[J]. 浙江大学学报(工学版), 2017, 51(3):612-619.
ZUO Shuguang,LI Yuejiao,WU Xudong,et al.Numerical simlulation and mechanism analysis of aerodynamic noise in claw pole alternator[J].Journal of Zhejiang University(Engineering Science), 2017, 51(3):612-619.
[14] 郝豫川，周远波，谢荣基.西南交通大学汽车电机声功率测试试验室检测报告[R].成都：中国测试技术研究院，2010.
HAO Yuchuan，ZHOU Yuanbo，XIE Rongji. Test reports of motor vehicle sound power measurement laboratory for Southwest Jiaotong University[R]. Chengdu：National Institute of Measurement and Testing Technology，2010.
[15] Roger M. Near-field fan noise modeling and installation effects due to scattering surfaces[J]. Fan Noise ,2007, 2007, 3: 13-21.
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