| 应用两相流模型模拟压铸充型过程的卷气现象 |
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| 引用本文： | 李帅君,熊守美,Mei Li,John Allison.应用两相流模型模拟压铸充型过程的卷气现象[J].金属学报,2009,45(10). |
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| 作者姓名： | 李帅君 熊守美 Mei Li John Allison |
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| 作者单位： | 1. 清华大学机械工程系先进成形制造教育部重点实验室,北京,100084
2. Research & Advanced Engineering Department,Scientific Research Laboratory, Ford Motor Company,Dearborn MI 48121,USA |
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| 基金项目： | 国家重点基础研究发展计划项目2005CB724105;;美国Ford汽车公司资助~~ |
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| 摘 要： | 通过对压铸充型过程中卷气缺陷形成机理的分析,认为型腔中空气的流动以及与金属液之间的相互作用是形成卷气现象的主要原因.为了考虑型腔中空气的流动,采用了一种不可压缩两相流数学模型来模拟压铸充型过程的卷气现象.通过计算流体力学中的两个基准算例,较为全面地验证了该模型的准确性和可靠性.在此基础上,设计了专门针对压铸充型过程的高速水模拟实验,通过对可视化实验结果与两相流模拟结果的比较,证实二者吻合较好,说明了该模型能够较好地模拟液体的充填行为和卷入其中的气泡.
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| 关 键 词： | 压铸 卷气 两相流模拟 |
A TWO-PHASE FLOW MODEL FOR SIMULATING AIR ENTRAPMENT DURING MOLD FILLING OF HIGH PRESSURE DIE CASTING PROCESS |
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| LI Shuaijun,XIONG Shoumei,Mei Li,John Allison.A TWO-PHASE FLOW MODEL FOR SIMULATING AIR ENTRAPMENT DURING MOLD FILLING OF HIGH PRESSURE DIE CASTING PROCESS[J].Acta Metallurgica Sinica,2009,45(10). |
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| Authors: | LI Shuaijun XIONG Shoumei Mei Li John Allison |
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| Abstract: | The most common defect found in high pressure die casting(HPDC) process is the gas porosity which significantly affects the mechanical properties of the final components.The generation of gas porosity is known mainly due to the air entrapment in the liquid metal during the mold filling stage. Knowing the trapped-air location and amount could allow for a more accurate and objective analysis of casting quality.In the past few decades,extensive efforts have been made to develop simulation codes of casting flow... |
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| Keywords: | die casting air entrapment two-phase flow modeling |
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