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中南大学学报(自然科学版)

Journal of Central South University

第49卷    第9期    总第289期    2018年9月

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文章编号:1672-7207(2018)09-2330-07
基于流固耦合模型的高功率密度内燃机缸内传热模型
张宇1,刘震涛2,左强1,肖宝兰1,孙树礼1,傅佳宏1

(1. 浙江大学城市学院 工程学院,浙江 杭州,310015;
2. 浙江大学 能源工程学院,浙江 杭州,310027
)

摘 要: 针对传统半经验公式不适用于高功率密度内燃机传热边界加载的问题,以WOSCHNI公式为基础,结合整机流固耦合数值计算方法,提出适用于高热流密度内燃机缸内传热的半经验公式。以某单缸试验机型为例,建立缸盖-缸体三维稳态耦合仿真系统,采用Fluent软件进行数值求解,并将该结果与整机测温试验结果进行对比。研究结果表明:在高功率密度样机的外特性曲线上,4个工况下仿真与试验结果的相对误差均在5%以内。因此,本文提出的半经验公式与建立的流固耦合模型能够较好地模拟内燃机稳态传热。

 

关键词: 内燃机;高功率密度;流固耦合;稳态传热;缸内传热模型

Heat transfer model for high power density internal combustion engine based on fluid-solid coupling model
ZHANG Yu1, LIU Zhentao2, ZUO Qiang1, XIAO Baolan1, SUN Shuli1, FU Jiahong1

1. School of Engineering, Zhejiang University City College, Hangzhou 310015, China;
2. Department of Energy Engineering, Zhejiang University, Hangzhou 310027, China

Abstract:For the problem that semi-empirical formula is not suitable for the heat transfer boundary condition of high power density internal combustion engine, the revised semi-empirical formula for heat transfer in this model was proposed based on the Woschni formula and the numerical calculation method of fluid-solid coupling. Taking a single cylinder test machine as an example, a three-dimensional steady-state coupled simulation system of head-sleeve was established. The numerical model was solved using Fluent software, and the results were compared with temperature test results of the whole engine. The results show that the relative error between simulation and experiment results is less than 5% under four conditions at power characteristics curve of high power density prototype. Therefore, the semi-empirical formula proposed and the fluid-solid coupling model established in this paper can well simulate the steady-state heat transfer of internal combustion engine.

 

Key words: internal combustion engine; high power density; fluid-solid coupling; steady-state heat transfer; in-cylinder heat transfer model

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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