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Stability Analysis of a Flexible Bladed-Rotor

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Abstract:

In any high-performance turbo-machinery, instability and damage are commonly occurring problems. The aim of this paper is to present a stability analysis of a fully-bladed flexible rotor. The flexural vibrations of the blades as well as those of the shaft are considered; the energetic approach used includes the effect of the rotational inertia. A stability detection method, bringing loci separation phenomena and coalescence, in case of an asymmetric rotor, to the fore, is made in order to determine a parametric domain where turbomachinery cannot encounter damage. Moreover, extensive parametric studies including for instance the length and the stagger angle of the blades are presented in order to obtain robust criteria for stable and unstable areas prediction. Finally, rotor/stator contact is introduced and the effect of the radial load acting on the blades when rubbing against a casing is considered.

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Periodical:

Key Engineering Materials (Volumes 293-294)

Pages:

409-416

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.293-294.409

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Cite this paper

Online since:

September 2005

Authors:

N. Lesaffre, Jean Jacques Sinou, F. Thouverez

Keywords:

Flexible Bladed-Rotor, Instability Prediction, Parametric Study, Rotor Dynamics

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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