铸件与铸型间界面传热系数的一种简化反求法
A Simplified Inverse Method for Interfacial Heat Transfer Coefficient between Casting and Mold
摘 要
为了简便、准确地确定在凝固过程中铸件与铸型间的界面传热系数,提出了一种新的简化反求法.先选择一个形体简单的铸件作为标准试样,利用不同的传热系数进行若干次温度-时间曲线的有限元模拟,并与实际铸件中对应点的温度-时间曲线进行比较;当两曲线比较接近时,该传热系数可作为铸件与铸型之间的等效界面传热系数;并将其作为实际叶轮铸件有限元模拟的参数,所得到的模拟结果与试验结果相符,证明该方法准确可靠.
反求法
凝固
有限元模拟
interfacial heat transfer coefficient(IHTC)
inverse method
solidification
FEM simulation
Abstract
In order to easily and accurately obtain the interfacial heat transfer coefficient (IHTC)between the casting and the mold during solidification,a new simplified inverse method was proposed.A casting with simple shape was employed as benchmark.The different constants of IHTC were used to finite element simulate the temperature-time curves.The simulated curves were compared with those of the corresponding actual casting.When the former curve was close to the later one,the coefficient could be regarded as the equivalent IHTC at the interface between the casting and mold.The simulated results accored with the test results by using the obtained equivalent IHTC as the finite element simulated parameters of the actual impeller casting,and it was proved that the method was reliable and accurate.
中图分类号 TG244
所属栏目 物理模拟与数值模拟
基金项目 国家自然科学基金资助项目(50864002);广西自然科学基金资助项目(0991001)
收稿日期 2009/12/9
修改稿日期 2010/7/26
网络出版日期
作者单位点击查看
备注许征兵(1979-),男,安徽安庆人,博士研究生.
引用该论文: XU Zheng-bing,ZENG Jian-min. A Simplified Inverse Method for Interfacial Heat Transfer Coefficient between Casting and Mold[J]. Materials for mechancial engineering, 2010, 34(12): 77～79
许征兵,曾建民. 铸件与铸型间界面传热系数的一种简化反求法[J]. 机械工程材料, 2010, 34(12): 77～79
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【3】GRIFFITHS W D.A model of the interfacial heat-transfer coefficient during unidirectional solidification of an aluminum alloy[J].Metallurgical and Materials Transactions B,2000,31(2):285-295.
【4】PRABHU K N,RAVISHANKER B N.Effect of modification melt treatment on casting/chill interfacial heat transfer and electrical conductivity of Al-13% Si alloy[J].Materials Science and Engineering A,2003,360(1/2):293-298.
【5】SANTOS C A,QUARESMA J M V,GARCIA A.Determination of transient interfacial heat transfer coefficients in chill mold castings[J].Journal of Alloys and Compounds,2001,319(1/2):174-186.
【6】WOODBURY K A,CHEN Y,PARKER J K,et al.Measurement of heat-transfer coefficients between Al castings and resin-bonded molds[J].AFS Transaction,1998,116:705-711.
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【8】薛祥,周彼德,蔺克亮.铸铝ZL101与数值砂型之间等效换热系数的数值模拟[J].材料科学与工艺,2001,9(2):206-210.
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