Abstract
This paper describes a new preliminary design method to conduct flutter screening of LPT blades with cyclic symmetry mode shapes. As in the method for real mode shapes, baseline unsteady aerodynamic analyses must be performed for the 3 fundamental motions, two translations and a rotation. Unlike the current method work matrices must be saved for a range of reduced frequencies and interblade phase angles. These work matrices are used to generate the total work for the complex mode shape. Since it only requires knowledge of the reduced frequency and mode shape (complex), this new method is still very quick and easy to use. Theory and example applications are presented and compared with the results of full three-dimensional viscous CFD analyses. Reasonable agreement is found. The interaction effects of the cosine and sine modes and the work associated with the steady pressure are shown to generally be significant.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Arnone, A, Poli, F., and Shipani, C., 2003, A Method to Assess Flutter Stability of Complex Modes, Accepted for Presentation at the 10th ISUAAAT, Duke University, September 2003
Chernycheva, O. V., Fransson, T. H., Kielb, R. E., and Barter, J., 2001, “Comparative analysis of blade mode shape influence on flutter of two-dimensional turbine blades”, ISABE-2001-1243, XVISOABE conference, September 2–7, Bangalore, India
Kielb, R. E., and Barter, J., Chernycheva, O. V., and Fransson, T. H., 2003, “Flutter of Low Pressure Turbine Blades with Cyclic Symmetric Modes – A Preliminary Design Method”, presented at ASME Turbo Expo 2003, June 2003, Atlanta, Georgia, accepted for publication in the ASME Journal of Turbomachinery.
Panovsky J., and Kielb R. E., 1998, “A Design Method to Prevent Low Pressure Turbine Blade Flutter”, 98-GT-575, ASME Gas Turbine Conference and Exhibition, Stockholm, Sweden
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2006 Springer
About this paper
Cite this paper
Kielb, R., Barter, J., Chernysheva, O., Fransson, T. (2006). FLUTTER DESIGN OF LOWPRESSURE TURBINE BLADES WITH CYCLIC SYMMETRIC MODES. In: Hall, K.C., Kielb, R.E., Thomas, J.P. (eds) UNSTEADY AERODYNAMICS, AEROACOUSTICS AND AEROELASTICITY OF TURBOMACHINES. Springer, Dordrecht. https://doi.org/10.1007/1-4020-4605-7_4
Download citation
DOI: https://doi.org/10.1007/1-4020-4605-7_4
Publisher Name: Springer, Dordrecht
Print ISBN: 978-1-4020-4267-6
Online ISBN: 978-1-4020-4605-6
eBook Packages: EngineeringEngineering (R0)