高原车用散热器的传热计算  

Calculating heat transfer of radiators for plateau vehicles

作　　者：李毅[1,2] 李远才[1] 刘景平 

机构地区：[1]华中科技大学材料科学与技术学院,湖北武汉430074 [2]广东大华仁盛科技有限公司,广东广州510540

出　　处：《华中科技大学学报（自然科学版）》2009年第9期90-93,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家火炬计划资助项目(2006GH041367)

摘　　要：分析并推导出大气密度和压力随海拔高度的变化规律．基于散热器的传热计算方法分析，推导出高原大气热力学参数对散热器传热的影响，即对流换热系数与大气密度的0．5～0．8次方成正比．总结出高原散热器传热计算的一般规律：参照平原条件下的散热器传热计算方法，海拔高度为3000m，4000m和5000m时，散热器总的换热能力需提高到平原的1．3倍，1.5倍和1.6倍．The influence and relationship of the air density and pressure under various altitudes was inferred. The calculation method of heat transferring for radiator was analyzed. The influence of thermodynamics properties of air on radiator heat transferring was deduced. Convection heat transfer coefficient is proportional to air density power of 0. 5-0. 8. The rules of heat transfer calculation of radiators for plateau vehicles are summed up. By comparison with the calculation of heat transfer of radiators used in plain, the radiator＇s heat exchange capability of plateau must be more 1.3 times, 1.5 times and 1.6 times than that of plain, when on 3 000 m above sea level, 4 000 m and 5 000 meters respectively.

关 键 词：散热器 传热 计算 高原 大气密度 海拔高度 

分 类 号：TK124[动力工程及工程热物理—工程热物理] U464.138[动力工程及工程热物理—热能工程]