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An Experimental Study on Film Cooling Performance Behind Barchan Dune-Shaped Ramps Using PSP and PIV Techniques

[+] Author Affiliations
Wenwu Zhou, Hui Hu

Iowa State University, Ames, IA

Paper No. GT2015-43781, pp. V05BT12A043; 13 pages
  • ASME Turbo Expo 2015: Turbine Technical Conference and Exposition
  • Volume 5B: Heat Transfer
  • Montreal, Quebec, Canada, June 15–19, 2015
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-5672-7
  • Copyright © 2015 by ASME


A novel Barchan-dune-assisted film cooling configuration was proposed and examined in present study. The effects of mass flux ratio, location, and height of Barchan dunes on film cooling effectiveness were investigated in great detail using the Pressure Sensitive Paint (PSP) and Particle Image Velocimetry (PIV) techniques. The PSP measurement results showed that the Barchan-dune-assisted film cooling configuration (H=0.5D, DB=−0.9D) can greatly enhance the film cooling effectiveness for flow from a cylindrical hole in relatively high mass flux ratio (M>0.85), which was explained by the PIV results in this study. Meanwhile the effects of Barchan dune location and height indicated that the film cooling performance of the Barchan-dune-assisted configuration is closely related to the height and location of the dune. It is wiser to choose Barchan dune of H=0.5D when it is placed upstream of the coolant hole, however the H=0.3D configuration is a better choice for placing the dune downstream.

Copyright © 2015 by ASME
Topics: Film cooling



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