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J4  2014, Vol. 48 Issue (1): 70-75    DOI: 10.3785/j.issn.1008-973X.2014.01.011
机械与能源工程     
柴油机冷却系统散热性能优化设计
张焕宇,郝志勇,郑旭
浙江大学 能源工程学系, 浙江 杭州 310027
Optimization design of heat transfer performance for diesel cooling water jacket
ZHANG Huan-yu, HAO Zhi-yong, ZHENG Xu
Department of Energy Engineering, Zhejiang University, Hangzhou 310027, China
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摘要:

针对某新型发动机出现的散热问题,采用流固耦合的方法对散热系统进行改进设计.建立发动机冷却水套和发动机的有限元计算模型,对该计算模型进行实验验证.以该模型为基础分析水套的散热性能,得到发动机水套的散热系数、压力损失、各缸的冷却液流量以及散热量等参数.对水套散热性能进行优化设计,优化后水套壁面换热系数与冷却液流动速度都有了很大提高,关键位置处换热系数达到10 000 W/(m2·K),流动速度均超过1 m/s.结果表明,采用流固耦合方法能够准确、快速地预测发动机水套的散热性能,帮助设计者快速找到影响水套散热性能的关键位置,节约大量的开发时间.

Abstract:

The fluid-solid coupling method was used to improve the performance of the engine water jacket in order to solve heat dispersion problems of new engine. The finite element model of the engine water jacket was established, and calibrated by test results. The heat dispersion performance of the engine water jacket was analyzed to get the information of  heat coefficient, pressure loss, flow rate and heat dispersion of each cylinder based on the model. The optimization of the water jacket was conducted. The heat transfer coefficient was reached 10 000 W/(m2·K) after the optimization, and the coolant velocity was above 1 m/s on the critical location. Results show that the fluid-solid coupling method can accurately predict the heat dispersion performance of engine water jacket, which helps researchers to locate the critical position of water jacket cooling performance and save a lot of time.

出版日期: 2014-01-01
:  TK 401  
通讯作者: 郝志勇,男,教授,博导.     E-mail: haozy@zju.edu.cn
作者简介: 张焕宇(1985-),男,博士生, 从事发动机虚拟设计与发动机振动噪声控制研究. E-mail:yyhuanyu@163.com
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引用本文:

张焕宇,郝志勇,郑旭. 柴油机冷却系统散热性能优化设计[J]. J4, 2014, 48(1): 70-75.

ZHANG Huan-yu, HAO Zhi-yong, ZHENG Xu. Optimization design of heat transfer performance for diesel cooling water jacket. J4, 2014, 48(1): 70-75.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2014.01.011        http://www.zjujournals.com/eng/CN/Y2014/V48/I1/70

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