Long duration blade loss simulations including thermal growths for dual-rotor gas turbine engine
✍ Scribed by Guangyoung Sun; Alan Palazzolo; A. Provenza; C. Lawrence; K. Carney
- Publisher
- Elsevier Science
- Year
- 2008
- Tongue
- English
- Weight
- 630 KB
- Volume
- 316
- Category
- Article
- ISSN
- 0022-460X
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✦ Synopsis
This paper presents an approach for blade loss simulation including thermal growth effects for a dual-rotor gas turbine engine supported on bearing and squeeze film damper. A nonlinear ball bearing model using the Hertzian formula predicts ball contact load and stress, while a simple thermal model estimates the thermal growths of bearing components during the blade loss event. The modal truncation augmentation method combined with a proposed staggered integration scheme is verified through simulation results as an efficient tool for analyzing a flexible dual-rotor gas turbine engine dynamics with the localized nonlinearities of the bearing and damper, with the thermal growths and with a flexible casing model. The new integration scheme with enhanced modeling capability reduces the computation time by a factor of 12, while providing a variety of solutions with acceptable accuracy for durations extending over several thermal time constants.