• CN：11-2187/TH
• ISSN：0577-6686

• 可再生能源与工程热物理 •

### 基于导热反问题的二维圆管内壁面第三类边界条件的反演

1. 1.北京化工大学机电工程学院 北京 100029
中国核电工程有限公司 北京 100840
2.清华大学热科学与动力工程教育部重点实验室 北京 100084
• 出版日期:2015-08-20 发布日期:2015-08-20
• 基金资助:
国家自然科学基金(51276009)、新世纪优秀人才支持计划(NCET-13-0651)和国家核电重大专项(2011ZX06004-004-001)资助项目

### Inversion of the Third Boundary Condition on the Inner Wall of a Two-dimensional Pipe Based on Inverse Heat Conduction Problems

HAN Wenwen1, WU Jian2, LIU Changliang2, LU Tao1, JIANG Peixue3, ZHU Yinhai3

1. 1.College of Mechanical and Electrical Engineering, Beijing University of Chemical Technology, Beijing 100029
2.China Nuclear Power Engineering Co., Ltd., Beijing 100840
Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Tsinghua University, Beijing 100084
• Online:2015-08-20 Published:2015-08-20

Abstract: The piping system with special safety requirements or higher requirements for structural completeness in nuclear power field, are not allowed to install the temperature sensor through opening pore in the pipe to measure the pipe wall temperature and fluid temperature. A kind of indirect and nondestructive method is in need to predict or evaluate the distribution and variations of the inner wall temperature. The mathematical model of temperature field is established based on the finite element method. And the inverse problem analysis is based on the conjugate gradient methods. The third boundary condition－the inner wall temperature, the fluid temperature near the inner wall, and the convective heat transfer coefficient－is simultaneously inverse solved, and the whole picture and distribution of the wall temperature are obtained. The calculation results and the error analysis indicates that the method is with high accuracy and can inverse estimate the third boundary condition precisely. The method can not only offer exact transient thermal load for the structure stress analysis and thermal fatigue analysis, but also provide a solid theoretical basis for achieving a kind of nondestructive measurement method.