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针对铸造型砂数量大,冷却耗时长和经济性差的难题,利用k-ε双方程模型对其自然对流冷却过程进行数值模拟。通过对已有储砂箱的分析,验证型砂自然对流冷却模拟的可行性。通过分析型砂温度场和冷却空气速度场,获得型砂自然对流冷却特性。从高径比和体积两个影响圆柱体型砂冷却的重要因素入手,通过模拟得到其与冷却时间之间的关系。结果表明:D/H=2,体积V=20 m2的圆柱体结构型砂自然对流冷却效率最高。
Aimed at the problem of large quantity of cast sand, long cooling time and poor economy, the natural convection cooling process was numerically simulated by k-ε two-equation model. Through the analysis of the existing sandbox, the feasibility of natural convection cooling simulation of sand was verified. By analyzing the temperature field of sand and cooling air velocity field, natural convection cooling characteristics of sand are obtained. Starting from the two important factors that affect the cooling of cylinder sand, the relationship between the cooling time and the ratio of height to diameter is obtained. The results show that natural convection cooling with D / H = 2 and volume V = 20 m2 has the highest convective cooling efficiency.