• CN:11-2187/TH
  • ISSN:0577-6686

›› 2002, Vol. 38 ›› Issue (8): 126-129.

• 论文 • 上一篇    下一篇

充型过程中紊流流动的数值模拟

麻向军;苏俊义;金胜灿;余国栋;侯骏;赵立信   

  1. 西安交通大学机械工程学院;中国第一汽车集团公司
  • 发布日期:2002-08-15

NUMERICAL SIMULATION OF TURBULENT FLOW DURING MOLD FILLING

Ma Xiangjun;Su Junyi;Jin Shengcan;Tong Guodong;Hou Jun;Zhao Lixin   

  1. Xi’an Jiaotong University China First Automobil Group Coporation
  • Published:2002-08-15

摘要: 采用简化代数应力模型研究充型过程中的紊流流动,采用守恒标量法和Van Leer格式确定自由表面形貌;在计算流场和确定自由表面时,分别采用两个不同的时间步长,克服了流场计算时间步长过小的缺点;开发了基于PHOENICS软件的恒温流体充型过程三维时均速度场和自由表面演变的数值模拟算法。用这些方法针对一个用于验证的试验进行模拟计算,结果表明,其计算速度比采用单一时间步长时提高很多,而其准确性仍能满足工程实用的要求。而采用K 模型时,计算结果与试验结果相差较远。

关键词: 简化代数应力模型, 时间步长, 守恒标量法, 自由表面

Abstract: The simplified algebraic stress model is successfully introduced into commercial CFD PHOENICS software. Meanwhile, the conserved scale method and the Van Leer scheme are used to determine the morphology of free surface. In order to overcome the disadvantage of small time step in numerical simulation, two different time steps are adopted to calculate velocity field and to determine free surface morphology respectively. The results show that these measures enhance the computation speed greetly, and the obtained accuracy can fulfil the demand of engineer application. It is also shown that the results of numerical simulation based on K model are quite different from experimemtal ones.

Key words: Conserved scale method, Free surface, Simplified algebraic stress model, Time step

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