| 汽车空调气动噪声数值与试验研究 |
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| 引用本文： | 李启良,钟立元,王毅刚,杨志刚.汽车空调气动噪声数值与试验研究[J].同济大学学报(自然科学版),2016,44(4):0620-0624. |
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| 作者姓名： | 李启良 钟立元 王毅刚 杨志刚 |
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| 作者单位： | 同济大学 上海地面交通工具风洞中心,上海 201804; 上海市地面交通工具空气动力与热环境模拟重点实验室,上海 201804,同济大学 上海地面交通工具风洞中心,上海 201804; 上海市地面交通工具空气动力与热环境模拟重点实验室,上海 201804,同济大学 上海地面交通工具风洞中心,上海 201804; 上海市地面交通工具空气动力与热环境模拟重点实验室,上海 201804,同济大学 上海地面交通工具风洞中心,上海 201804; 上海市地面交通工具空气动力与热环境模拟重点实验室,上海 201804 |
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| 基金项目： | 上海市地面交通工具风洞专业技术服务平台（14DZ2291400）;国家自然科学基金项目（11302153） |
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| 摘 要： | 通过数值仿真和台架试验相结合的方法开展某车型空调系统气动噪声研究.研究发现,精细网格和大涡模拟方法能够获得高精度的出风口风量分配结果,它们与试验最大偏差为4.35%,最小偏差为0.93%.与此同时,空间流线的紊乱和当地速度的大小直接影响其表面总声压级的大小,对于计算的空调系统,风机是主要噪声源,改善风机流动分离,降低风机噪声是空调系统降噪的关键.可穿透面的声辐射方法有效地考虑到表面压力脉动的偶极子噪声和空间涡流的四极子噪声,是汽车空调气动噪声计算中声辐射的有效处理方法.利用该方法得到的测点总声压级与试验值更加接近,约相差2dBA,频谱变化趋势和数值基本一致,推荐作为后续空调气动噪声仿真的声辐射处理方法.
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| 关 键 词： | 汽车空调 气动噪声 大涡模拟 可穿透面 |
| 收稿时间： | 2015/1/12 0:00:00 |
| 修稿时间： | 2016/1/14 0:00:00 |
Experimental and Numerical Investigations of Aerodynamic Noise for Automotive Air conditioning |
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| LI Qiliang,ZHONG Liyuan,WANG Yigang and YANG Zhigang.Experimental and Numerical Investigations of Aerodynamic Noise for Automotive Air conditioning[J].Journal of Tongji University(Natural Science),2016,44(4):0620-0624. |
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| Authors: | LI Qiliang ZHONG Liyuan WANG Yigang and YANG Zhigang |
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| Institution: | Shanghai Automotive Wind Tunnel Center, Tongji University, Shanghai 201804, China; Shanghai Key Laboratory of Vehicle Aerodynamics and Vehicle Thermal Management Systems, Shanghai 201804, China,Shanghai Automotive Wind Tunnel Center, Tongji University, Shanghai 201804, China; Shanghai Key Laboratory of Vehicle Aerodynamics and Vehicle Thermal Management Systems, Shanghai 201804, China,Shanghai Automotive Wind Tunnel Center, Tongji University, Shanghai 201804, China; Shanghai Key Laboratory of Vehicle Aerodynamics and Vehicle Thermal Management Systems, Shanghai 201804, China and Shanghai Automotive Wind Tunnel Center, Tongji University, Shanghai 201804, China; Shanghai Key Laboratory of Vehicle Aerodynamics and Vehicle Thermal Management Systems, Shanghai 201804, China |
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| Abstract: | The aerodynamic noise of automotive air conditioning was investigated by numerical and experimental methods. Results show that high precision outlet air distribution results can be obtained by the fine mesh and large eddy simulation method. The maximum deviation is 4.35% and the minimum deviation is 0.93%. The total sound pressure level of surface is dependent on the local velocity and the disorder of pathlines. The fan is the main sound source of the automotive air conditioning, and the key to reduce the fan noise by improving the flow separation of fan. Permeable surface sound propagation method effectively considers dipole source generated by the surface pressure fluctuation and quadrupole source generated by vortex. It is an effective treatment method to calculate the aerodynamic noise of automotive air conditioning. The total sound pressure level of test points obtained by the method are closer to the experimental values. The difference between them is 2 dBA and the tendency of the spectrum is consistent, which can be recommended as the sound propagation method of aerodynamic noise simulation. |
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| Keywords: | automotive air conditioning aerodynamic noise large eddy simulation permeable surface |
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