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Application of inverse method to estimation of boundary conditions during investment casting simulation

Haipeng JIN

金属学报(英文版) doi:10.1016/S1006-7191(08)60119-2

Inverse method was used in single crystal superalloy DD6 processing simulation during solidification. Numerical modeling coupled with experiments has been used to estimate the interface heat transfer coefficient (IHTC) between the surface of slab casting and inner mold. Calculated temperature dependent values of IHTC were obtained from a numerical solution. The calculated temperatures agreed well with the measurement of cooling profile.

关键词: Numerical simulation , Single crystal , Inverse method , Boundary conditions

高温环境下硅酸铝纤维的隔热性能

王超 , 刘婷婷 , 蒋立异 , 廖文和

宇航材料工艺 doi:10.3969/j.issn.1007-2330.2014.06.014

硅酸铝纤维供应商往往只提供客户硅酸铝纤维在某一温度的热导率,难以指导隔热结构的设计.本文针对市场上常用的硅酸铝纤维板,设计了隔热性能测试装置,实验获得硅酸铝纤维温度随时间的变化曲线,并进行了有限元仿真分析.研究表明,硅酸铝纤维隔热效果稳定且具有一定的抗热辐射能力.有限元分析结果与实验数据基本一致,说明采用有限元分析方法能够支持设计人员较好预测隔热效果.

关键词: 硅酸铝纤维 , 隔热性能 , 温度 , ANSYS , 边界条件

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