On a General Method of Unsteady Potential Calculation Applied to the Compression Stages of a Turbomachine—Part I: Theoretical Approach

[+] Author and Article Information
F. Bakir, S. Kouidri, T. Belamri, R. Rey

Laboratoire d’ Energetique e de Mechanique des Fluides Interne, Ecole Nationale Superieure d’ Arts et Metiers, 151, boulevard de l’Hopital, 75013 Paris, France

J. Fluids Eng 123(4), 780-786 (Jun 06, 2001) (7 pages) doi:10.1115/1.1399286 History: Received October 01, 1999; Revised June 06, 2001
Copyright © 2001 by ASME
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Grahic Jump Location
Position of the singularities
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Discretization of the profile
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Parameters of discretization
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Absolute velocity field C/C1 calculated in the stage
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(a) Relative velocity field on the surface of the 4 rotor blades. (b) Absolute velocity field on the surface of the 7 stator blades.
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Geometry with equal pitch (case A)
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Strongly aperiodic geometry (case B)
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Pitch deviation lower than 1 percent (case C)
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Conformal mapping of a general cascade to a plane one
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Blade to blade pressure field (N=900 rpm,dRS=25 mm)
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Relative velocity field in the centrifugal impeller which has a strong angular asymmetric (qv/qvn=0.5N=900 rpm,dRS=25 mm)
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Influence of the distance impeller-volute tongue (N=900 rpm,qv/qvn=1,p1=0.5 bar)




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