Characteristics of Non-Stationary Thermal Stresses In the Low-Pressure Part of the Rotor

Guzović, Zvonimir and Matijašević, Branimir and Mihalić, Tihomir (2011) Characteristics of Non-Stationary Thermal Stresses In the Low-Pressure Part of the Rotor. = Characteristics of Non-Stationary Thermal Stresses In the Low-Pressure Part of the Rotor. In: 15th International Research/Expert Conference ”Trends in the Development of Machinery and Associated Technology” - TMT 2011, 12.-18.09.2011., Prag, Češka.

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Abstract

In the paper “Modelling of Non-stationary Thermal Stresses in Steam Turbine Rotors” 1 presented at TMT 2004, the algorithm and the results of non-stationary thermal stresses modelling in steam turbine rotor by means of the users software package are shown. Non-stationary thermal stresses are stipulated by pressure change on turbine exit. The results of non-stationary thermal stress calculations (i.e. of the numerical modelling) show on several characteristic regions of the rotor thermal stressed state: a) the rotor central bore ; b) the low-pressure rotor ; c) the disc of the last turbine stage, and d) the rear-end labyrinth gland. As follow-up to the paper “Characteristics of Non-Stationary Thermal Stresses in Steam Turbine Rotors” 2 presented at TMT 2006, these characteristic regions are additionally analysed. As in the low-pressure part of the rotor the high gradients of thermal and mechanical quantities (temperature, heat flux, deformation, stresses) are determined, so this region of steam turbine rotor is analysed in detail. In this paper the results of this analysis are presented.

Item Type: Conference or Workshop Item (Lecture)
Keywords (Croatian): steam turbine, low pressure rotor, non-stationary thermal stresses, numerical modelling
Subjects: TECHNICAL SCIENCE > Mechanical Engineering
Divisions: 500 Department of Energy, Power Engineering and Environment > 520 Chair of Fluid Mechanics
500 Department of Energy, Power Engineering and Environment > 530 Chair of Turbomachinery
Indexed in Web of Science: No
Indexed in Current Contents: No
Date Deposited: 21 Mar 2016 11:07
Last Modified: 25 Mar 2016 09:48
URI: http://repozitorij.fsb.hr/id/eprint/5287

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