Simplification of 3D transient heat conduction by reducing it to an axisymmetric heat conduction problem and a new inverse method of the problem solution
Authors:
- Piotr Duda
Abstract
Most IHCP-solving methods available in literature are formulated for simple-shaped bodies and cannot be applied to complex geometries. In this work, the 3-D problem is simplified to an axisymmetric analysis. If the nozzle diameter is not much smaller than the diameter of the cylindrical component, a corrected axisymmetric model is proposed. Next, a method is presented for solving the axisymmetric IHCP in a complex domain. It is based on the control volume finite element method. Based on temperature transients measured on the outer surface, the temperature distribution is reconstructed by marching from the known to the unknown boundary. The developed method is applied for temperature identification in a cylindrical component with a nozzle. The presented algorithm is tested using measured temperatures generated from a direct solution. The transient temperature distribution obtained from the method presented in the paper is compared with the values obtained from the direct solution. The proposed method is also used to estimate the unknown boundary condition. The information about the heat transfer coefficient value makes it possible to describe the heat transfer phenomena occurring inside the component. The presented method makes it possible to optimize the power unit start-up and shutdown, contributes to a reduction in heat losses arising during the operations and enables extension of the power unit life. The method can be used in monitoring systems of both conventional and nuclear power plants.
- Record ID
- CUTa8757e1ade6c4ace91b56d8db3447f69
- Publication categories
- ;
- Author
- Journal series
- International Journal of Heat and Mass Transfer, ISSN 0017-9310, e-ISSN 1879-2189
- Issue year
- 2019
- Vol
- 143
- Pages
- [1-10]
- Other elements of collation
- schem.; wykr.; Bibliografia (na s.) - 10; Bibliografia (liczba pozycji) - 25; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 143
- Substantive notes
- Numer artykułu: 118492
- Keywords in English
- inverse problems, heat conduction, control volume method, diagnostic system
- DOI
- DOI:10.1016/j.ijheatmasstransfer.2019.118492 Opening in a new tab
- URL
- https://www.sciencedirect.com/science/article/pii/S0017931019318630 Opening in a new tab
- Related project
- Opracowanie metod identyfikacji nieustalonych zjawisk cieplno-wytrzymałościowych. . Project leader at PK: , ,
Projects financed by NSC [Projekty finansowane przez NCN] - Language
- eng (en) English
- Score (nominal)
- 200
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUTa8757e1ade6c4ace91b56d8db3447f69/
- URN
urn:pkr-prod:CUTa8757e1ade6c4ace91b56d8db3447f69
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.