Estimation of heat transfer coefficient and phase transformation latent heat by modified pattern search method

被引：17

作者：

Wang, Kai-Yun ^{[1
]}

Jin, Yu-Jing ^{[1
]}

Xu, Meng-Jia ^{[1
]}

Chen, Jie-Shi ^{[1
]}

Lu, Hao ^{[1
,2
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200030, Peoples R China

[2] Shanghai Jiao Tong Univ, Key Lab Shanghai Laser Mfg & Mat Modificat, Shanghai 200030, Peoples R China

来源：

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER | 2015年 / 68卷

关键词：

Heat transfer coefficient; Phase transformation latent heat; Pattern search method; TEMPERATURE-FIELD; INVERSE; PREDICTION;

D O I：

10.1016/j.icheatmasstransfer.2015.08.001

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

This paper describes in detail the measurement of the overall heat transfer coefficient and phase transformation latent heat by modified pattern search method (PSM). By introducing the pattern search algorithm into finite element analysis, the measurement of heat transfer coefficients and phase transformation latent heat can be simplified as recording the temperature with time. Comparison of the measurements by PSM and temperature gradient method (TGM) shows that PSM can evaluate the overall heat transfer coefficient accurately. Experiments and simulations show that bainite transformation latent heat in 26NiCrMoV10-10 steel is about -90.5 J/g, and the latent heat increases the surface temperature of a cylindrical specimen by a maximum of 76 degrees C. Error analysis shows that the highest difference between calculated temperature and measured temperature is 11.7 degrees C, which verifies that the heat transfer coefficient and phase transformation latent heat estimated by PSM are accurate, and that the pattern search method is reliable. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：14 / 19

页数：6

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