双螺杆制备半固态坯料的数值模拟  

Numerical Simulation of Semi-solid Slurry Preparation by Twin-screw

作　　者：张晓华[1] 张艳英[2] 杜之明[1] 罗守靖[1] 谢水生[3] 

机构地区：[1]哈尔滨工业大学材料科学与工程学院 [2]哈尔滨师范大学数学与计算科学学院 [3]北京有色金属研究总院有色金属材料制备加工国家重点实验室

出　　处：《特种铸造及有色合金》2009年第9期803-805,共3页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(50674017);中国博士后基金资助项目(20070420023)

摘　　要：基于计算流体动力学,对双螺杆制备半固态浆料的工艺过程进行了数值模拟,获得了半固态浆料制备过程中的速度场和应力场,并对双螺杆对浆料的剪切、混合作用进行了讨论。结果表明,双螺杆对浆料的搅拌剪切作用显著,应力沿螺杆轴向不断增加,在螺杆左右两侧呈不对称分布,这可能跟螺杆的旋转方向有关。Based on the computational fluid dynamics (CFD),the preparation process of semi-solid slurry by twin-screw was simulated to understand the velocity field and stress field in process of preparation,meanwhile,the role of twin-screw in shearing and stirring slurry was approached. The results reveal that twin-screw plays significant role in shearing and stirring slurry. In addition,stress that exhibits asymmetrical distribution at two sides of the screw is increased along the axial direction of the screw,which is possibly related to the rotating direction of screw.

关 键 词：半固态浆料 双螺杆 数值模拟 计算流体动力学 

分 类 号：TG249.9[金属学及工艺—铸造]