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Boundary Layer Transition of Strongly Concave Surfaces PUBLIC ACCESS

[+] Author Affiliations
Stephen Riley, Mark W. Johnson, John C. Gibbings

The University of Liverpool, Liverpool, UK

Paper No. 89-GT-321, pp. V001T01A112; 7 pages
doi:10.1115/89-GT-321
From:
  • ASME 1989 International Gas Turbine and Aeroengine Congress and Exposition
  • Volume 1: Turbomachinery
  • Toronto, Ontario, Canada, June 4–8, 1989
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7913-9
  • Copyright © 1989 by ASME

abstract

Boundary layer transition has been studied on two blades of constant 0.5 and 1 metre radius of curvature with free stream turbulence levels of 0.7%, 2.6% and 7.2%. Zero pressure gradients were used throughout. Strong Gortler vortices developed in the boundary layer which led to growth rates of up to ten times the flat plate rate. The boundary layer profile was also highly distorted by the vortices. Transition correlation techniques for flat plates proved totally inadequate for the concave surface data, but a method of obtaining correlations for these surfaces was suggested by considering the inner critical region of the boundary layer alone.

Copyright © 1989 by ASME
Topics: Boundary layers
This article is only available in the PDF format.

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