| Mathematical model of convection diathermanous coefficient of refrigerator car |
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| 作者姓名： | 王忠堂 张士宏 梅瑞斌 |
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| 作者单位： | [1]College of Materials Science ＆ Engineering, Shenyang Ligong University, Shenyang 110168, China [2]Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110015, China |
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| 摘 要： | It is analyzed that the influence factors on temperature field of refrigerator car. The mathematical model of convection diathermanous coefficient has been put forward. It is considered in the model that the parameters of wind speed , car speed , temperature of car surface , temperature of surroundings ,etc. If the boundary conditions and parameters used in calculation model of convection transmits heat coefficient are confirmed as following: the cold plank car velocity V is 120 km/ h, and air temperature is 25 ℃, and the atmosphere press is 1013250 Pa, and wind velocity Vf is 10 m/ s, and the length of car bodywork L is 5 m, and bodywork surface temperature is 25 ℃. The results were obtained by the model: when the wind velocity direction is the same as car velocity, the coefficient K of convection transmits heat is 51.4(W·m-2·K-1), and when the wind velocity direction is against the car velocity, K is 90.58 (W·m-2·K-1).
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| 关 键 词： | 制冷技术 数字模拟技术 转换模式 冷藏车 |
| 文章编号： | 1005-9113（2007）05-0695-03 |
| 修稿时间： | 2005-07-09 |
Mathematical model of convection diathermanous coefficient of refrigerator car |
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| WANG Zhong-tang,ZHANG Shi-hong,MEI Rui-bin.Mathematical model of convection diathermanous coefficient of refrigerator car[J].Journal of Harbin Institute of Technology,2007,14(5):695-697. |
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| Authors: | WANG Zhong-tang ZHANG Shi-hong MEI Rui-bin |
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| Abstract: | It is analyzed that the influence factors on temperature field of refrigerator car. The mathematical model of convection diathermanous coefficient has been put forward. It is considered in the model that the parameters of wind speed, ear speed, temperature of car surface, temperature of surroundings, etc. If the boundary conditions and parameters used in calculation model of convection transmits heat coefficient are confirmed as following: the cold plank car velocity V is 120 km/h, and air temperature is 25℃, and the atmosphere press is 1013250 Pa, and wind velocity V f is 10 m/s, and the length of car bodywork L is 5 m, and body work surface temperature is 25℃. The results were obtained by the model: when the wind velocity direction is the same as car velocity, the coefficient K of convection transmits heat is 51.4 ( W·m-2·K-1) , and when the
wind velocity direction is against the car velocity. K is 90.58 ( W·m-2·K-1) . |
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| Keywords: | mathematical model convection diathermanous coefficient refrigerator car |
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