| 汽车排气消声器内部流场及温度场的数值计算 |
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| 引用本文： | 李以农,路明,郑蕾,陈清平,郑玲.汽车排气消声器内部流场及温度场的数值计算[J].重庆大学学报(自然科学版),2008,31(10):1094-1097. |
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| 作者姓名： | 李以农 路明 郑蕾 陈清平 郑玲 |
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| 作者单位： | 重庆大学,机械传动国家重点实验室,重庆,400030;成都陵川工业有限责任公司,四川,成都,610110 |
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| 基金项目： | 国家自然科学基金，重庆市自然科学基金 |
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| 摘 要： | 通过对一典型结构汽车排气消声器进行建模,根据流场计算特点划分网格,利用ANSYS CFX软件对其内部流场及温度场进行数值模拟研究,分析气流速度、温度变化及压力分布对消声器性能(声学性能和空气动力性能)的影响.分析得出结论,设计消声器时必须考虑从结构上消除产生高速湍流和高速气流的可能,且在满足消声性能的前提下尽量减少压力损失,减少穿孔结构能有效地降低压力损失.
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| 关 键 词： | 消声器 流场 温度场 双方程 |
Numerical simulation of the flow and temperature fields in an automotive exhaust muffler |
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| LI Yi-nong,LU Ming,ZHENG Lei,CHEN Qing-ping,ZHENG Ling.Numerical simulation of the flow and temperature fields in an automotive exhaust muffler[J].Journal of Chongqing University(Natural Science Edition),2008,31(10):1094-1097. |
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| Authors: | LI Yi-nong LU Ming ZHENG Lei CHEN Qing-ping ZHENG Ling |
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| Institution: | LI Yi-nong1,LU Ming1,ZHENG Lei1,CHEN Qing-ping2,ZHENG Ling1(1.State Key Laboratory of Mechanical Transmission,Chongqing University,Chongqing 400030,P.R.China,2.Chengdu Lingchuan Industrial Limited Liability Co.,Chengdu 610110,P.R.China) |
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| Abstract: | By building a model of a typical exhaust muffler structure,a grid mesh was formed based on the calculation characteristic of the flow field.The software ANSYS CFX then was used to numerically simulate the flow and temperature fields in a muffler.The effects of the gas velocity and temperature variation on sound elimination performance,including the acoustics and aerodynamics performance,were analyzed.The result suggests that high-velocity turbulence and high-speed flow should be eliminated from muffler stru... |
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| Keywords: | muffler flow field temperature field dual-equation |
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