A new reduced-order aeroelastic model using the principal shapes (AMPSs) of modes is presented. Rotors with flexible disks and alternate blade mistuning can challenge the fidelity of flutter prediction techniques that assume uniform blade-to-blade geometry and mode shape invariance with nodal diameter pattern. The AMPS method, however, accounts for alternating blade geometry as well as varying blade mode shapes, providing accurate flutter predictions for a large number of modes from a small number of computational fluid dynamics simulations. AMPS calculations on rotors with alternate blade mistuning are presented and compared to other prediction techniques. The results provide insight into how alternate blade mistuning affects aerodynamic coupling and the flutter characteristics of a rotor.
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January 2009
Research Papers
Aeroelastic Analysis of Rotors With Flexible Disks and Alternate Blade Mistuning
James A. Eley
James A. Eley
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James M. Bleeg
Ming-Ta Yang
James A. Eley
J. Turbomach. Jan 2009, 131(1): 011011 (9 pages)
Published Online: October 17, 2008
Article history
Received:
June 20, 2007
Revised:
July 19, 2007
Published:
October 17, 2008
Citation
Bleeg, J. M., Yang, M., and Eley, J. A. (October 17, 2008). "Aeroelastic Analysis of Rotors With Flexible Disks and Alternate Blade Mistuning." ASME. J. Turbomach. January 2009; 131(1): 011011. https://doi.org/10.1115/1.2812957
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