- Tytuł:
- Determination of temperature and thermal stresses distribution in power boiler elements with use inverse heat conduction method
- Autorzy:
- Grądziel, S.
- Powiązania:
- https://bibliotekanauki.pl/articles/240169.pdf
- Data publikacji:
- 2011
- Wydawca:
- Polska Akademia Nauk. Czytelnia Czasopism PAN
- Tematy:
-
metoda inwersji
propagacja nacisków
szybkozmienna temperatura
współczynnik przenikania ciepła
heat transfer coefficient
inverse method
stress distribution
transient temperature - Opis:
- The following paper presents the method for solving one-dimensional inverse boundary heat conduction problems. The method is used to estimate the unknown thermal boundary condition on inner surface of a thick-walled Y-branch. Solution is based on measured temperature transients at two points inside the element's wall thickness. Y-branch is installed in a fresh steam pipeline in a power plant in Poland. Determination of an unknown boundary condition allows for the calculation of transient temperature distribution in the whole element. Next, stresses caused by non-uniform transient temperature distribution and by steam pressure inside a Y-branch are calculated using the finite element method. The proposed algorithm can be used for thermal-strength state monitoring in similar elements, when it is not possible to determine a 3-D thermal boundary condition. The calculated temperature and stress transients can be used for the calculation of element durability. More accurate temperature and stress monitoring will contribute to a substantial decrease of maximal stresses that occur during transient start-up and shut-down processes.
- Źródło:
-
Archives of Thermodynamics; 2011, 32, 3; 191-200
1231-0956
2083-6023 - Pojawia się w:
- Archives of Thermodynamics
- Dostawca treści:
- Biblioteka Nauki