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TECHNICAL PAPERS

Prediction of Flutter of Turbine Blades in a Transonic Annular Cascade

[+] Author and Article Information
Ivan McBean

 Alstom Power, Switzerland

Kerry Hourigan, Mark Thompson

 Monash University, Australia

Feng Liu

 University of California, Irvine, California

J. Fluids Eng 127(6), 1053-1058 (May 29, 2005) (6 pages) doi:10.1115/1.2060731 History: Received November 02, 2004; Revised May 29, 2005

A parallel multiblock Navier-Stokes solver with the kω turbulence model is used to solve the unsteady flow through an annular turbine cascade, the transonic Standard Test Case 4, Test 628. Computations are performed on a two- and three-dimensional model of the blade row with either the Euler or the Navier-Stokes flow models. Results are compared to the experimental measurements. Comparisons of the unsteady surface pressure and the aerodynamic damping are made between the three-dimensional, two-dimensional, inviscid, viscous simulations, and experimental data. Differences are found between the stability predictions by the two- and three-dimensional computations, and the Euler and Navier-Stokes computations due to three-dimensionality of the cascade model and the presence of a boundary layer separation, respectively.

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Copyright © 2005 by American Society of Mechanical Engineers
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Figures

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Figure 1

Surface pressure coefficient for coarse and fine meshes

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Figure 2

Surface pressure coefficient for Euler, and two- and three-dimensional configurations

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Figure 3

Schlieren distributions for steady Navier-Stokes simulations

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Figure 4

Steady pressure coefficient and separated zone on blade suction side for three-dimensional simulation

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Figure 5

Distribution of steady pressure coefficient for 3-dimensional simulation versus experiment

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Figure 6

First harmonic magnitude of unsteady pressure for blade suction side at midspan

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Figure 7

First harmonic magnitude of unsteady pressure on blade pressure side at midspan

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Figure 8

Phase of first harmonic of unsteady pressure at midspan

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Figure 9

Magnitude of first harmonic of unsteady pressure for three-dimensional configuration

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Figure 10

Phase of first harmonic of unsteady pressure for three-dimensional configuration

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Figure 11

Damping coefficient for different simulations versus experiment

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