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Numerical Investigation of the Rotation on the Film Cooling Over a Flat Surface

[+] Author Affiliations
Patrick Young, Shui Ting Ding, Zhi Tao

Beijing University of Aeronautics and Astronautics, Beijing, P. R. China

Paper No. GT2005-68553, pp. 527-536; 10 pages
doi:10.1115/GT2005-68553
From:
  • ASME Turbo Expo 2005: Power for Land, Sea, and Air
  • Volume 3: Turbo Expo 2005, Parts A and B
  • Reno, Nevada, USA, June 6–9, 2005
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-4726-8 | eISBN: 0-7918-3754-8
  • Copyright © 2005 by ASME

abstract

A computational analysis was carried out to comprehend the mechanism of rotation on the film cooling which is important in understanding the mixing process between the film coolant and the hot stream air over the high pressure turbine blades. In this paper, a simple flat surface with a vertical film cooling hole was positioned parallel to the hot main stream and different rotating orientations were selected to simulate the blade pressure or suction sides. A polar coordinate frame was used with the center of the film cooling hole center as the origin point and three parameters S/D, the polar angle and either the adiabatic effectiveness or heat transfer coefficient could be chosen as the control parameters to produce a 2D graph of the effective film cooling areas. The rotation effects were clearly shown with the effective film cooling area graphs. The effective film cooling area was reduced with the rotating speed increasing.

Copyright © 2005 by ASME
Topics: Rotation , Cooling

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