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Test of Innovative Nozzle Design for Film Cooling System to Maximize Turbine Efficiency

[+] Author Affiliations
Faure J. Malo-Molina, Kau-Fui V. Wong, Andreja Brankovic

University of Miami, Coral Gables, FL

Paper No. IMECE2002-33151, pp. 37-43; 7 pages
doi:10.1115/IMECE2002-33151
From:
  • ASME 2002 International Mechanical Engineering Congress and Exposition
  • Advanced Energy Systems
  • New Orleans, Louisiana, USA, November 17–22, 2002
  • Conference Sponsors: Advanced Energy Systems Division
  • ISBN: 0-7918-3626-6 | eISBN: 0-7918-1691-5, 0-7918-1692-3, 0-7918-1693-1
  • Copyright © 2002 by ASME

abstract

The ideal design of a turbine blade external film cooling system should contain a minimal uniform cooling film while simultaneously maximizing turbine efficiency. The current research reports on the tests on the pressure drop, hydraulic resistance, and mass flow rate of nine different nozzles. The effectiveness of the resulting film of cold air depends upon the mass flow rate and the shape, size, distribution and directional angles of these tiny nozzles. Of the orifices tested, the orifice shaped with the biggest spherical counter-sink inlet, allows the air to exit with the highest momentum. This shape produces the lowest hydraulic resistance and the highest blowing ratio.

Copyright © 2002 by ASME

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