张俊红，赵永欢，徐喆轩，胡欢，王杰，马梁.发动机水套中沸腾传热的试验与仿真研究[J].内燃机工程,2018,39(1):42-48.
发动机水套中沸腾传热的试验与仿真研究
Simulation and Experimental Study on Boiling Heat Transfer in Engine Water Jacket
DOI：
关键词:发动机水套  沸腾传热  两相流  模拟仿真  优化设计
Key Words:engine water jacket  boiling heat transfer  two phase flow  simulation  optimization and design
基金项目:国家科技重大专项项目（2016YFD0700701）
作者单位
张俊红，赵永欢，徐喆轩，胡欢，王杰，马梁 1.天津大学 内燃机燃烧学国家重点实验室，天津300350；2.天津大学 仁爱学院 机械工程系，天津301636 
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摘要:为了更加准确地研究发动机水套内冷却液流动传热问题，在Mixture多相流基础上建立了一套适用于发动机水套沸腾传热的气液两相流模型。以某直列4缸汽油机为研究对象，通过试验对汽油机第4缸火力面温度进行测量，两相流与传统单相流模拟结果对比表明两相流准确性更高。在两相流模拟结果基础上找出了汽油机水套壁面高温危险区，并基于发动机水套的设计要求提出了优化方案。模拟结果表明：优化后水套内冷却液的流动与冷却更加均匀，水套壁面温度明显降低，传热效果得到了提升。本研究可为以后的发动机沸腾传热研究和冷却水套设计提供参考。
Abstract:In order to accurately study the heat transfer problem of the coolant flow in the engine water jacket, a gas liquid two phase flow model suitable for the boiling heat transfer in the engine water jacket was established on the basis of the mixture multiphase flow model. The temperature of the fourth cylinders fire surface was measured by a certain four cylinder gasoline engine, and the high accuracy of the two phase flow simulation was verified compared with the traditional single phase flow simulation. On this basis, the high temperature danger zone of the water jacket wall was found out, and the optimization scheme was proposed according to the design requirements of the engine water jacket. Results show that after optimization, the coolant flow and cooling are more uniform, the wall temperature of the water jacket is decreased and the heat transfer effect is also improved, which provides a reference for the future research on engine boiling heat transfer and the design of cooling water jacket.
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