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基于边界条件替换法建立了铝合金连续铸造喷水冷却过程的换热系数计算模型。采用实验测量铸锭冷却过程的表面温度和温度场数值计算相结合的方法 ,确定了铸锭表面温度为 10 0～ 5 0 0℃和喷水密度为 11.3～2 7.8L/ (m·min)时的换热系数 ,结果表明在不同的表面温度区间内 ,换热系数随着喷水密度增加而增大 ;当喷水密度相同时 ,随着铸锭表面温度升高 ,换热系数迅速降低
Based on the boundary condition replacement method, the calculation model of heat transfer coefficient of aluminum alloy during continuous casting spray cooling was established. The experimental results show that the surface temperature of the ingot is 10 0 ~ 500 ℃ and the water spray density is 11.3 ~ 2 7.8 L / (m · min) by using the method of numerical calculation of the surface temperature and the temperature field in the process of ingot cooling. The results show that the heat transfer coefficient increases with the increase of spray water density in different surface temperature ranges. When the spray water density is the same, the heat transfer coefficient decreases rapidly with the increase of ingot surface temperature