型砂自然对流冷却数值模拟  

Numerical Simulation of Casting Sand in Natural Convection Cooling

作　　者：周根明[1] 孙鹏举[1,2] 宋印东[1] 刘少俊[1] 

机构地区：[1]江苏科技大学能源与动力工程学院,江苏镇江212003 [2]崖东船所,广东江门529100

出　　处：《铸造技术》2014年第2期329-333,共5页Foundry Technology

基　　金：江苏省高校自然科学研究面上项目(12KJB470005)

摘　　要：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 problems that a great amount of foundry sand take a long time in cooling and have poor economy, a k-ε two equation model was used to simulate natural convection cooling process. Through the analysis of the existing casting sand cabinet, the feasibility of numerical simulation of natural convection cooling process of casting sand was validated. Analyzing its cooling properties from temperature field of casting sand and velocity field of air, the relationships between the cooling time and the height/diameter ratio and volume of the cylindrical casting sand were obtained by simulations. The results show that the natural convection cooling efficiency of cylindrical casting sand with the structure of D/H=2 and V=20 m3 is the highest.

关 键 词：型砂 自然对流冷却 数值模拟 

分 类 号：TG242[金属学及工艺—铸造]