| 某微型车车外气动噪声仿真分析 |
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| 引用本文： | 汪怡平.某微型车车外气动噪声仿真分析[J].航空动力学报,2009,24(7). |
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| 作者姓名： | 汪怡平 |
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| 作者单位： | 湖南大学汽车车身先进设计制造国家重点实验室 |
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| 基金项目： | 国家高技术研究发展计划,湖南省科技计划重大项目 |
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| 摘 要： | 对某微型车气动噪声进行了数值仿真分析。首先，采用大涡模拟（LES）对车外的瞬态外流场进行了仿真分析，然后，应用Lighthill-Curle声类比理论，采用FW-H声学模型，预测了其声学特性。根据流场和声学模拟结果，改进后视镜局部造型来降低气动噪声，最后进行了道路实验，测试了60km/h-120km/h整车噪声，测试结果表明，整车噪声有了明显降低，且最大降低了1.2dB(A)。
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| 关 键 词： | 计算流体力学 大涡模拟 气动噪声 声类比 |
| 收稿时间： | 7/12/2008 2:53:55 PM |
| 修稿时间： | 5/22/2009 8:30:23 PM |
Evaluation of Aerodynamic Noise Generated in Miniature Car Using Numerical Simulation |
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| wangyiping.Evaluation of Aerodynamic Noise Generated in Miniature Car Using Numerical Simulation[J].Journal of Aerospace Power,2009,24(7). |
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| Authors: | wangyiping |
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| Institution: | State Key Laboratory of Advanced Design and Manufacture for Vehicle Body |
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| Abstract: | The aerodynamic noise of a mini-car is computed. The transient exterior flow field is computed by LES, and then the noise characteristic is predicted using FW-H model with Lighthil-Curle acoustic analogy theory. According to the flow field and acoustic simulation we can lower the aerodynamic noise through optimizing the rear view mirror model .finally a real vehicle road test is used, and the test velocities are from 60km/h to 120km/h. The result shows that the vehicle noise has been noticeably reduced, and the maximum degradation is 1.2dB (A). |
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| Keywords: | CFD Large eddy simulation (LES) Aerodynamic noise Acoustic analogy |
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