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A Fundamental Study of Wake-Boundary Layer Interaction on Turbomachinery Blading

[+] Author Affiliations
R. L. Evans

University of British Columbia, Vancouver, BC, Canada

Paper No. FEDSM2002-31251, pp. 1043-1046; 4 pages
doi:10.1115/FEDSM2002-31251
From:
  • ASME 2002 Joint U.S.-European Fluids Engineering Division Conference
  • Volume 2: Symposia and General Papers, Parts A and B
  • Montreal, Quebec, Canada, July 14–18, 2002
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-3616-9 | eISBN: 0-7918-3600-2
  • Copyright © 2002 by ASME

abstract

Turbulent boundary layers on turbomachine blades are three-dimensional and highly unsteady. The flow becomes periodically unsteady due to the relative motion of the rotor and stator blades in a stage. A large velocity defect within the wake of an upstream blade generates a varying incidence angle, and a fluctuating velocity at entrance to the next stage. The velocity defect, or wake, travels downstream with a finite speed and intermittently perturbs the boundary layer on downstream blades.

Copyright © 2002 by ASME
Topics: Wakes , Turbomachinery

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