摘要
根据DEM模型,对不同射料口位置的射料充填过程进行数值模拟。建立了欧拉/拉格朗日离散颗粒模型,采用数值模拟方法,研究消失模铸造泡沫珠粒射料充填过程中稠密气/固两相流动的流体动力学特性。泡沫珠粒的运动与气相压力分布密切相关,泡沫珠粒充填过程中在排气塞附近区域形成型腔内外压力差,是珠粒充填的动力。在其他条件相同时,对两种不同射料口位置条件下的射料充填过程进行了数值模拟。结果表明,射料口应当布置在型腔较宽的部位,尽量减少射料口附近和泡沫珠粒运动方向上的障碍,使料流运动顺畅。
The injection filling process of LFC with different position of bead inlets was simulated by the DEM model, in which the Euler-Lagrange divorced particle model was established. Flow kinetic charac- teristics of densified gas-solid phase of foamed beads during filling process was investigated by the numerical simulation. The movement of foamed beads is closely related with gas-phase pressure distribution. The inner-outer pressure difference formed near venting plug during filling process drives the bead movement. At fixed other conditions, injection filling process of foamed beads was simulated with different positions of bead inlets. The results reveal that the bead inlets should be set at a wider location of cavity to reduce the hinder near beads inlets and movement direction of beads as possible to realize the smooth flow.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2013年第5期451-455,共5页
Special Casting & Nonferrous Alloys
基金
深圳市基础研究计划(一般项目)资助项目(JC201006020794A)
深圳市科技计划资助项目(JC201006020796A)
关键词
消失模
射料充填过程
排气塞
数值模拟
Lost Foam Casting
Filling Process
Venting Plug
Numerical Simulation
