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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2008, Vol. 9 Issue (9): 1270-1276    DOI: 10.1631/jzus.A0820223
Civil and Mechanical Engineering     
Numerical simulation and optimization design of the EGR cooler in vehicle
Yu-qi HUANG, Xiao-li YU, Guo-dong LU
Power Machinery and Vehicular Engineering Institute, Zhejiang University, Hangzhou 310027, China; Zhejiang Yinlun Machinery Co., Ltd., Tiantai 317200, China
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Abstract  The EGR (exhaust gas recirculation) technique can greatly reduce the NOx emission of diesel engines, especially when an EGR cooler is employed. Numerical simulations are applied to study the flow field and temperature distributions inside the EGR cooler. Three different models of EGR cooler are investigated, among which model A is a traditional one, and models B and C are improved by adding a helical baffle in the cooling area. In models B and C the entry directions of cooling water are different, which mostly influences the flow resistance. The results show that the improved structures not only lengthen the flow path of the cooling water, but also enhance the heat exchange rate between the cool and hot media. In conclusion we suggest that the improved structures are more powerful than the traditional one.

Key words： Exhaust gas recirculation (EGR) cooler      Computational fluid dynamics (CFD)      Shell-and-tube heat exchanger      Helical baffle     
Received: 26 March 2008     
CLC:  TK414.2+12  
  O357.5  
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Yu-qi HUANG
Xiao-li YU
Guo-dong LU
Cite this article:

Yu-qi HUANG, Xiao-li YU, Guo-dong LU. Numerical simulation and optimization design of the EGR cooler in vehicle. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2008, 9(9): 1270-1276.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.A0820223     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2008/V9/I9/1270

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