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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 66
COMPUTATIONAL MECHANICS: TECHNIQUES AND DEVELOPMENTS
Edited by: B.H.V. Topping
Paper VI.5

Aeroelastic Analysis Program for Turbomachines

R. Srivastava+, M.A. Bakhle+, T.G. Keith Jr.+ and D. Hoyniak#

+Department of Mechanical, Industrial and Manufacturing Engineering, University of Toledo,Toledo, Ohio, United Sates of America
#Rolls-Royce, Indianapolis, Indiana, United States of America

Full Bibliographic Reference for this paper
R. Srivastava, M.A. Bakhle, T.G. Keith Jr., D. Hoyniak, "Aeroelastic Analysis Program for Turbomachines", in B.H.V. Topping, (Editor), "Computational Mechanics: Techniques and Developments", Civil-Comp Press, Edinburgh, UK, pp 149-159, 2000. doi:10.4203/ccp.66.6.5
Abstract
This paper describes an aeroelastic analysis program for turbomachines. The program is based on the Euler/Navier-Stokes equations and is validated using experimental data and analytical and numerical results. Blade structural response is modelled using a modal representation of the blade and the work-per-cycle method is used to evaluate the stability characteristics. Non-zero inter-blade phase angle is modelled using phase-lagged periodic boundary conditions. Two phase-lagged analysis methods, time-shifted, and Fourier-decomposition have been implemented in the code and are validated by comparison to a multiple passage analysis. The time-shifted method is used for the validation of the aeroelastic analysis code. Steady and unsteady predictions obtained from TURBO-AE show good agreement with analytical and numerical results. Comparisons with experimental results are in good agreement over most of the blade surface. However, in the leading edge region where a flow separation was known to occur, the agreement was only fair.

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