铁路冷藏车不稳定传热反应系数法的研究与分析  

Study and Analysis on Response Factor Method in Unsteady Heat Transfer of Railway Refrigerator Car

作　　者：刘广海[1] 谢如鹤[2] 

机构地区：[1]中南大学交通运输工程学院,湖南长沙410075 [2]广州大学物流与运输研究中心,广东广州510006

出　　处：《中国铁道科学》2007年第1期86-92,共7页China Railway Science

基　　金：国家自然科学基金资助项目(50378091);铁道部科技研究开发计划项目(2005X012);EASTS国际研究团队合作项目(IRG-08-2005);广州大学科研基金资助项目(2004)

摘　　要：由于铁路冷藏车在结构、运行环境等方面与普通建筑相比存在较大区别,故传热特性不同,反应系数差异大。使用反应系数法研究铁路冷藏车的不稳定传热过程,利用计算机辅助分析方法对冷藏车围护结构的不稳定传热进行数值计算,考察不同车速、不同方程根项数以及不同反应系数项数等对冷藏车负荷计算精度的影响。研究表明:冷藏车运行速度对整体计算精度影响不大,取200 km.h-1时的相关数值最佳;方程根值取至-25,车顶的反应系数项数取至第30项,车壁和车底的反应系数项数取至第15项,即可满足求解精度要求。The characteristics of heat transfer and response factor were different between railway refrigerator car and buildings because the difference of structure and operation condition, etc. The unsteady heat transfer of railway refrigerator car is studied by response factor method. The unsteady heat transfer of walls is calculated by computer and the influences on the load by the velocity, the numbers of response factor and the numbers of equation root are analyzed. The research indicates that the velocity of railway refrigerator car has little effect on the calculation precision. Choosing the data in 200 km · h^-1 is better. The calculation precision is satisfied when the equation root is taken to -25, the number of response factor was taken to No. 30 in the top wall and No. 15 in other walls.

关 键 词：铁路冷藏车 不稳定传热 反应系数法 优化设计 

分 类 号：U272.5[机械工程—车辆工程]