机冷车在不同货物堆码方式下温度场分布的数值模拟  

Numerical Simulation of Temperature Field Distribution inside Mechanical Refrigerator Car in Different Goods Stacking Modes

作　　者：彭梦珑[1] 段国权 丁力行[1] 阮秀英[1] 

机构地区：[1]中南大学能源科学与工程学院 [2]武汉中铁勘察设计研究院,湖北武汉430071

出　　处：《铁道学报》2007年第5期37-42,共6页Journal of the China Railway Society

摘　　要：机冷车在进行冷藏运输时,货物品质的好坏与车厢内温度场的均匀分布密切相关。作者以B10冷藏车作为研究对象,以车体实际尺寸建立物理模型,应用工程中带浮升力的k-ε湍流模型作为数学模型,利用airpark软件进行数值模拟计算,研究了货物在整车堆码方式、二分之一堆码方式和四分之一堆码方式下的温度分布,通过3种堆码方式的比较,分析了货物的纵向间隔和横向间隔对改善货物内部温度分布的影响。结果表明,在一定的货物导热系数范围内送风对其影响深度约为0.5 m,由此分析出最佳的货物堆码单元,即以1 m3为堆码单元最为合适。此结果为机冷车的冷藏运输提供了理论依据。When the mechanical refrigerator car operates in refrigeration transportation, the goods quality is closely related with uniform distribution of the inside temperature field. Refrigerator car Bl0 is studied as an example. The physical model is established according to the actual size of the car body, the k-ε turbulence model is applied as the numerical simulation model and the airpark software is used in simulation computation. The temperature distributions of three different stacking modes （the whole-car close-stacking mode, dichotomy stacking mode, quartation stacking mode） are studied, and the influence of the longitudinal and lateral spaces on temperature distribution is analyzed. The results show that the cooling wind generates 0.5 meters influence deepness in a certain range of thermal conductivity of goods and so the optimal stacking unit of goods is deduced as one cubic meter.

关 键 词：数值模拟 堆码方式 间隔 温度分布 影响深度 

分 类 号：U272.5[机械工程—车辆工程]