Determination of interfacial heat-transfer coefficient during investment-casting process of single-crystal blades

详细信息    查看全文

• 作者：Yiwei Dong¹ ;   ; ^a ;   ; ^{dongyiwei618@gmail.com} ; Kun Bu^a ; Yangqing Dou^a ; Dinghua Zhang^a
• 关键词：Temperature field ; Numerical simulation ; Interfacial heat transfer coefficient ; Inverse method ; Investment casting
• 刊名：Journal of Materials Processing Technology
• 出版年：2011
• 出版时间：December 2011
• 年：2011
• 卷：211
• 期：12
• 页码：2123-2131
• 全文大小：1262 K

文摘

Abstract

A single-crystal hollow turbine blade was taken as the typical part to estimate the interfacial heat-transfer coefficient (IHTC) during investment-casting process. The experimental scheme was followed to measure the temperature distributions during the casting process by the tungsten¨Crhenium (W¨CRe) thermocouples. Using the finite-element methodology and the measured temperatures during the casting process, the time-dependent interfacial heat-transfer coefficient was studied by inverse heat-conduction analysis. The empirical formula for the time-dependent interfacial heat-transfer coefficient can be established. The calculation results are in good agreement with the experimental results, and the accuracy of the casting numerical simulation is improved effectively.