车用散热器高原传热性能仿真研究

doi:10.16182/j.issn1004731x.joss.201808040

系统仿真学报 ›› 2018, Vol. 30 ›› Issue (8): 3146-3153.doi: 10.16182/j.issn1004731x.joss.201808040

车用散热器高原传热性能仿真研究

许翔¹, 索文超², 杨定富³, 董素荣¹

1. 军事交通学院军用车辆系,天津 300161;
2. 陆军航空兵学院预选士官训练基地,北京 101123;
3. 陆军汽车试验场,定远 233200

收稿日期:2016-11-03 出版日期:2018-08-10 发布日期:2019-01-08
作者简介:许翔(1978-),男,甘肃榆中,博士,副教授,研究方向为车用发动机热平衡控制;索文超(1979-),男,河北,博士,讲师,研究方向为军用车辆性能仿真与优化。
基金资助:
军队科研项目(2012ZL500,40407030103)

Heat Transfer Simulation of Vehicle Heat Exchanger in Plateau Environment

Xu Xiang¹, Suo Wenchao², Yang Dingfu³, Dong Surong¹

1. Department of Military Vehicle, Military Transportation University, Tianjin 300161, China;
2.Primary Non-Commissioned Officer Training Base, Army Aviation Institute, Beijing 101123, China;
3.Automotive Proving Ground of Army, Dingyuan 233200, China

Received:2016-11-03 Online:2018-08-10 Published:2019-01-08

摘要/Abstract

摘要： 研究高原环境对车用散热器传热性能的影响机理,依据空气特性参数随海拔高度的变化规律,对散热器传热公式进行修正。基于热网络法,采用FlowMaster软件建立车用散热器传热仿真模型,研究海拔高度和传热介质流量对散热器传热性能的影响规律。结果表明：大气压力和空气密度减小是车用散热器高原传热性能显著下降的主要原因,随着海拔升高和冷却空气流速减小,空气侧换热通道内冷却空气的雷诺数减小,冷却空气的流动状态从湍流渐变为层流,对流换热强度下降,进而使散热器传热系数减小,导致散热器的高原散热能力下降。海拔每升高1 000 m,散热器空气侧对流换热系数和散热量分别下降约9.5%和9.0%。

关键词: 散热器, 高原, 热网络, 传热性能, 仿真

Abstract: The effect of heat transfer caused by plateau environment in vehicle heat exchanger was investigated. The heat transfer equation for heat exchanger was modified by introducing air parameters at different altitudes. A heat transfer modeling approach for vehicle heat exchanger was proposed by using the thermal network method. The heat transfer effect of the plateau and the flow state of fluid medium were analyzed in the vehicle heat exchanger by using the simulation software FlowMaster. Simulation results show that the decrease of pressure and density of air in altitude was the primary cause to heat transfer ability. With the altitude increasing and airflow velocity decreasing, the Re of airflow decreased while the flow state of air in the channel changed from turbulence to laminar state, therefor the convective heat transfer strength declined; and the heat transfer coefficient and the heat transfer ability of heat exchanger both decreased. With every 1 000 m rising in altitude, the heat transfer coefficients of air side and the heat emission of heat exchanger declined by 9.5% and 9.0% respectively.

Key words: heat exchanger, plateau, thermal network method, heat transfer, simulation

中图分类号:

TK124

许翔, 索文超, 杨定富, 董素荣. 车用散热器高原传热性能仿真研究[J]. 系统仿真学报, 2018, 30(8): 3146-3153.

Xu Xiang, Suo Wenchao, Yang Dingfu, Dong Surong. Heat Transfer Simulation of Vehicle Heat Exchanger in Plateau Environment[J]. Journal of System Simulation, 2018, 30(8): 3146-3153.

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车用散热器高原传热性能仿真研究

Heat Transfer Simulation of Vehicle Heat Exchanger in Plateau Environment

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