【摘要】 采用数值模拟的方法,建立冷藏车厢内复杂耦合传热的K-ε模型,并用CFD软件Fluent对3种不同的货物装载间隙下厢内速度场及温度场的分布进行分析比较。结果表明,货物与车体侧壁之间的间隙能有效地减少外界热环境的影响。间隙越大,间隙内冷空气流动速度越快,能够更快地吸收和转移外界热环境传入的大部分热量,靠近壁面附近气流温度迅速降低,温度场分布越均匀;受车体传热的影响,靠近车体边壁处的气流温度最高,厢体中部温度最低。因此,在实际冷藏运输过程中,应当综合考虑装载量和温度场的均匀性,选择合适的货物装载间隙。更多还原

【Abstract】 Based on numerical simulation approach,establishes the K-ε model of complicated coupling heat transfer process in the body of mechanical refrigerated vehicles.Simulates the steady velocity and temperature fields inside the body with CFD code Fluent for three different loading gaps.Analysis and comparison of the simulations show that the effect of thermal environment outside would be lessened effectively by the distance between the cargoes and the lateral wall,the larger distance,the larger air velocity inside the gap.As a result of which the cold air inside the gap could absorb and transfer the thermal energy introduced from the outside environment more quickly and the temperature beside the lateral wall could be reduced quickly which have a good effect on the uniformity of the temperature distribution inside the body.Besides,it also shows that the temperature near the lateral wall is the highest while in the middle of the body is the lowest.Therefore,appropriate loading gaps should be set by considering both the loadage and the uniformity of temperature field during the refrigerated transportation process.更多还原