Numerical Simulation of Filling Process of Vacuum Counter-pressure Casting Aluminum Alloy Based on the Fluent Software

Yan Qingsong; Tu Zipeng; Lu Gang; Zhang Shouyin; Xiong Bowen; Lu Baiping

doi:10.15980/j.tzzz.2013.04.015

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Numerical Simulation of Filling Process of Vacuum Counter-pressure Casting Aluminum Alloy Based on the Fluent Software
Vol. 33, Issue 4, Pages: 330-333(2013)
Published： 2013 ，
DOI： 10.15980/j.tzzz.2013.04.015

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[1]严青松,涂紫鹏,芦刚,张守银,熊博文,卢百平.基于FLUENT的铝合金真空差压充型过程数值模拟[J].特种铸造及有色合金,2013,33(04):330-333.

Yan Qingsong, Tu Zipeng, Lu Gang, et al. Numerical Simulation of Filling Process of Vacuum Counter-pressure Casting Aluminum Alloy Based on the Fluent Software. [J]. Special Casting & Nonferrous Alloys 33(4):330-333(2013)
[1]严青松,涂紫鹏,芦刚,张守银,熊博文,卢百平.基于FLUENT的铝合金真空差压充型过程数值模拟[J].特种铸造及有色合金,2013,33(04):330-333. DOI： 10.15980/j.tzzz.2013.04.015.

Yan Qingsong, Tu Zipeng, Lu Gang, et al. Numerical Simulation of Filling Process of Vacuum Counter-pressure Casting Aluminum Alloy Based on the Fluent Software. [J]. Special Casting & Nonferrous Alloys 33(4):330-333(2013) DOI： 10.15980/j.tzzz.2013.04.015.

摘要

结合真空差压铸造特点

采用专业流体软件ANSYS Fluent中标准k-ε模型对铝合金真空差压充型过程进行数值模拟

对某复杂薄壁铝合金壳体铸件进行了试制

并对模拟结果进行了验证与讨论。充型模拟结果表明

随着真空压力降低

真空度越高

铝合金液态金属的充型速度加快

充填形态更为平稳

无明显波动现象;在真空度为20kPa时

铝合金铸件充型完整

卷气和裹气现象明显减少。实际结果与充型过程的模拟预测相符合。

Abstract

Based on the characteristics of vacuum counter-pressure casting

numerical simulation of filling process of vacuum counter-pressure aluminum alloy was carried out by the standard k-ε module from the ANSYS Fluent software

and a complicated thin-walled aluminum alloy housing was trial-produced by the vacuum counter-pressure casting technology to verify the simulated results. The results indicate that with the decrease of vacuum pressure and the increase of vacuum degree

filling velocity of liquid aluminum alloy is increased with more and more stable without obvious fluctuation phenomenon in filling morphology. With vacuum degree of 20 kPa

aluminum alloy housing castings were filled completely with the great decrease of gas-entrapment defects. Moreover

the experimental results are well in agreement with simulated ones

which shows that numerical simulation can provide a reference for practical production and the forming process optimization of vacuum counter-pressure casting complicated and thin-walled aluminum alloy castings.