Transient heat transfer as a leading factor in fatigue of thick-walled elements at power plants

• Autorzy: Wacławiak Krzysztof , Okrajni Jerzy

Identyfikatory

DOI

10.24425/ather.2019.129549

• Języki publikacji: EN

Abstrakty

EN

The authors present a numerical study of a start-up of a boiler with a thick-walled element subjected to thermomechanical loading. The significance of calculations of real heat transfer coefficients has been demonstrated. Fluid dynamics, mechanical transient thermal and static structural calculations have been conducted in both separate and coupled modes. Strain-stress analyses prove that the effect of the heat transfer coefficient changing in time and place in comparison with a constant one as recommended by standards is the key factor of fatigue calculations.

Słowa kluczowe

EN

thick-walled elements; transient heat transfer; thermomechanical fatigue

PL

element grubościenny; zawór wylotowy; zmęczenie cieplno-mechaniczne

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2019
• Tom: Vol. 40, no 3
• Strony: 43--55
• Opis fizyczny: Bibliogr. 15 poz., rys., tab.

Twórcy

autor

Wacławiak Krzysztof

• Silesian University Technology, Division of Engineering Materials, Krasińskiego 8, 40-019 Katowice, Poland

autor

Okrajni Jerzy

• Silesian University Technology, Division of Engineering Materials, Krasińskiego 8, 40-019 Katowice, Poland

Bibliografia

• [1] EN 12952-3 Standard.
• [2] Farragher T.P., Scully S., O’Dowd N.P., Leen S.B.: Development of life assessment procedures for power plant headers operated under flexible loading scenarios. Int. J. Fatigue 49(2013), 50–61.
• [3] Farragher T.P., Scully S., O’Dowd N.P., Leen S.B.: Thermomechanical analysis of pressurized pipe under plant conditions. J. Press. Vess.-T ASME 135(2012), 1, 011204–011204.
• [4] Dzierwa P., Taler J.: Optimum heating of pressure vessels with holes. J. Press. Vess.-T ASME 137(2015), 1, 011202–011202-8.
• [5] Okrajni J., Twardawa M.: Local Strains that lead to the thermo-mechanical fatigue of thick-walled pressure vessels. Mater. Perform. Char. ASTM Int. 2(2014), 2, 244–261.
• [6] Okrajni J., Twardawa M.: Boundary conditions in models of power plant components under thermal loading. Arch. Mater. Sci. Eng. 62(2013), 1, 28–35.
• [7] Duda P., Rza¸sa D.: A new method for determining allowable medium temperature during transient operation of thick-walled elements in a supercritical power plant. Arch. Thermodyn.31(2010), 3, 55–72, doi: 10.2478/v10173-010-0014-9.
• [8] Pioro I., Mokry S.: Thermophysical Properties at Critical and Supercritical Pressures, Heat Transfer - Theoretical Analysis, Experimental Investigations and Industrial Systems. (A. Belmiloudi (Ed.), InTech, 2011 ISBN: 978-953-307-226-5 (available from: http://www.intechopen.com/books/heat-transfer-theoreticalanalysisexperimental-investigations-and-industrial-systems/thermophysical-properties-atcritical-andsupercritical-pressures).
• [9] Twardawa M.: Fatigue Conditionings and the Durability of Alloys Applied for Thick-Walled Elements of Supercritical Boilers. PhD thesis, Silesian University of Technology, Gliwice, 2014 (in Polish).
• [10] Manson S.S., Halford G.R.: Fatigue and Durability of Materials at High Temperatures. ASTM Int., 2009.
• [11] Ansys 17.0. Documentation. Fluent.
• [12] Ansys 17.0. Documentation. Mechanical Applications.
• [13] Bressers J., Remy L. (Eds.): Fatigue under Thermal and Mechanical loading. Kluwer Academic Pub., 1996.
• [14] Hähner P., Rinaldi C., Bicego V., Affeld E., Brendel T., Andersson H., Beck T., Klingelhöffer H., Kühn H.J., Köster A., Laveday M., Marchionni M., Rae C.: Research and development into a European code-of-practice for strain-controlled thermo-mechanical fatigue test. Int. J. Fatigue 30(2008), 2, 372–381.
• [15] Sehitoglu H.: Thermal and thermo-mechanical fatigue of structural alloys. In: Fatigue and Fracture ASTM Handbook: Vol. 19 (S.R. Lampman, N.D. DiMatteo, Eds.). ASM Int., 2008, 527–556.

Uwagi

EN

This research was supported in part by PLGrid Infrastructure. Computations have been performed at Prometheus supercomputer at ACC Cyfronet AGH/UST.

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).