NUMERICAL SIMULATION OF FLOW-INDUCED AIR ENTRAPMENT DEFECTS IN THE HIGH PRESSURE DIE CASTING PROCESS

被引：0
|
作者：
Li, Shuai-Jun [1 ]
Xiong, Shou-Mei [1 ]
Liu, Bai-Cheng [1 ]
Li, Mei [2 ]
Allison, John [2 ]
机构：
[1] Tsinghua Univ, Dept Mech Engn, State Key Lab Automot Safety & Energy, Beijing 100084, Peoples R China
[2] Ford Motor Co, Sci Res Lab, Res & Adv Engn Dept, Dearborn, MI 48121 USA
来源：
MAGNESIUM TECHNOLOGY 2010 | 2010年
关键词：
NAVIER-STOKES EQUATIONS; GAS;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In the current paper, a numerical method to predict the air entrapment defects in the high pressure die casting (HPDC) process was presented and the distribution of the entrapped air at the end of the mold-filling stage was represented by the concentration of air in the liquid metal. The time-dependent, incompressible Navier-Stokes equations were first solved using a fractional step algorithm to model the fluid flow during the mold-filling stage of the HPDC process. The free surfaces were calculated using the volume of fluid method. At each time step, the isolated air bubbles in the liquid metal were found and the pressure of the bubbles was updated using the ideal gas law. The concentration transport equation was applied to calculate the air entrapment distribution. X-ray inspection of a step-shape magnesium die casting was performed to verify the air entrapment prediction. A comparison between the experimental and numerical results revealed a close similarity.
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页码：613 / +
页数：2
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