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设计并搭建了连铸二冷气雾射流热态传热试验装置,进行了连铸二冷区钢板试样冷却过程的模拟。通过在试样内部布置热电偶测量试样实时温度值,利用一维非稳态导热反问题计算法反算了表面温度、表面传热系数和表面热流密度。结果表明,试样气雾冷却过程中其表面热流密度随喷射过程呈现波动起伏,在射流冲击区宽度方向上呈现中心大,边部小的趋势,平均对流传热系数为2 454.6W/(m2·K)。
Design and set up a continuous heat transfer test device for the secondary cooling aerosol jet, and simulate the cooling process of the steel samples in the secondary cooling zone. By measuring the real-time temperature of the specimen by arranging the thermocouple inside the specimen, the surface temperature, the surface heat transfer coefficient and the surface heat flux are inversely calculated by using one-dimensional unsteady thermal inverse problem calculation method. The results show that the surface heat flux density fluctuates with the jetting process during the aerosol cooling and shows a large center and small edge in the jet impact zone. The average convective heat transfer coefficient is 2 454.6W / (m2 · K).