鱼雷罐罐体温降与内衬厚度关系特性分析

Analysis of the Relationship Between Temperature Drop and Inner Lining Thickness of Torpedo Car

以某钢厂320 t鱼雷罐为研究对象,利用Fluent软件建立三维传热数学模型,考虑罐体物性参数随温度变化的非线性、辐射的非线性等因素,模拟实际生产状况下鱼雷罐罐体及罐壳的温度场,分析鱼雷罐内衬温度分布随时间的变化关系及工作层厚度对温降的影响。结果表明:鱼雷罐外壳温度随时间的增加而降低;初始状态时,罐体两端椎体部位温度高于中间部位的温度,14 h后内罐体椎体部位温度下降速度大于中间部位温度下降速度,这是由于罐体两端椎体部位内衬厚度小于中间部位内衬厚度,热量传递快;沿厚度由内向外方向上,温度下降幅度愈来愈小。比较模拟计算结果与现场测量的罐体外表面温度,两者吻合较好,最大误差仅为1.32%。

Take a 320 t torpedo car as the research object, a three-dimensional heat transfer mathematical model was established with the Fluent software, and the temperature field of the body and the car shell under actual production conditions were simulated, in which non- linear change of physical parameters with the temperature change and the radiation was considered. The changing of temperature distribution of torpedo car inside lining with time and the effect of lining thickness on the temperature drop were analyzed. The results show that temperature of the external shell decreases with time increasing. In the initial state, the temperatures of vertebral body parts on both ends of car are higher than those of the middle parts. 14 h later, the vertebral body parts temperatures drop faster than those of the middle parts, which is because the lining thickness of the vertebral body parts on both ends of car is less than that of the middle, and the heat transfer is fast. The temperature drop is decreased gradually along the thickness from the inside to the outside. By comparing the measured temperature of the external shell and the calculated result, the two agree well, the maximum error is only 1.32%.