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Influence of Two Rows Compound and Simple Angle Holes in Inline and/or Staggered on Film Cooling and Heat Transfer

[+] Author Affiliations
Bilal Y. Maiteh

Delphi Corporation

Paper No. IMECE2005-79256, pp. 447-454; 8 pages
doi:10.1115/IMECE2005-79256
From:
  • ASME 2005 International Mechanical Engineering Congress and Exposition
  • Heat Transfer, Part A
  • Orlando, Florida, USA, November 5 – 11, 2005
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 0-7918-4221-5 | eISBN: 0-7918-3769-6
  • Copyright © 2005 by ASME

abstract

This paper describes the results of an experimental investigation into the effect of the mainstream flow history on the film cooling effectiveness and the heat transfer characteristics from the combination of one row of simple angle holes and one row of compound angle holes. The mainstream flow history includes: favorable pressure gradient factors in the range −1.11 × 10−6 to +1.11 × 10−6 and turbulence intensity in the range 0.3% to 4.7%. The presence of favorable pressure gradients in the flow reduces the film cooling protection of the surfaces from both compound angle holes or combination of simple and compound angle holes, while the presence of adverse pressure gradients increases the film cooling effectiveness at low blowing rate and decreases it at high blowing rate. Increasing the turbulence intensity reduces the film cooling effectiveness from compound angle holes or combination of simple and compound angle holes.

Copyright © 2005 by ASME

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