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PIV Measurements of Periodically Forced Flat Plate Film Cooling Flows With High Free Stream Turbulence FREE

[+] Author Affiliations
Sivaram P. Gogineni, Darryl D. Trump

Systems Research Laboratories, Dayton, OH

Richard B. Rivir

Aero Propulsion and Power Directorate, Wright-Patterson AFB, OH

David J. Pestian

University of Dayton Research Institute, Dayton, OH

Paper No. 96-GT-236, pp. V004T09A033; 13 pages
doi:10.1115/96-GT-236
From:
  • ASME 1996 International Gas Turbine and Aeroengine Congress and Exhibition
  • Volume 4: Heat Transfer; Electric Power; Industrial and Cogeneration
  • Birmingham, UK, June 10–13, 1996
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7875-0
  • Copyright © 1996 by ASME

abstract

Two color double pulsed Particle Image Velocimetry (PIV) measurements of simulated turbine film cooling flows have been made for blowing ratios of 0.5, 0.7, and 1.0 in the near field of the film cooling hole, x/d≤2.5. The effect of the vane wake on the rotor film cooling flow is simulated by periodically forcing the film cooling flows at the nnn dimensional reduced frequency. Phase locked measurements at 45 deg. increments of the periodic film forcing (0, 45, 90, 135, 180, 225, 270, and 315 deg.) for free stream turbulence levels of 1 and 17% have been made. The effects of reduced frequencies of 20 and 80, at free stream turbulence levels of 1 and 17% on the spreading of the film cooling jet are investigated. Increases in the jet spread with forcing and free stream turbulence are > 2 times those in the unforced 1% free stream turbulence case.

Copyright © 1996 by ASME
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