0

Full Content is available to subscribers

Subscribe/Learn More  >

Heat Transfer Performance of Fan-Shaped Film Cooling Holes: Part I—Experimental Analysis

[+] Author Affiliations
L. Bonanni, B. Facchini, L. Tarchi

Università degli Studi di Firenze, Firenze, Italy

M. Maritano, S. Traverso

Ansaldo Energia S.P.A., Genova, Italy

Paper No. GT2010-22808, pp. 1561-1571; 11 pages
doi:10.1115/GT2010-22808
From:
  • ASME Turbo Expo 2010: Power for Land, Sea, and Air
  • Volume 4: Heat Transfer, Parts A and B
  • Glasgow, UK, June 14–18, 2010
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4399-4 | eISBN: 978-0-7918-3872-3
  • Copyright © 2010 by ASME

abstract

Fan-shaped holes are widely used to provide better cooling performance than cylindrical holes over a large range of different operating conditions. Main advantages of such solution include a reduced amount of cooling air for the same performance, increased part lifetime, and fewer required holes. As the overall cooling performance of such holes is strictly related to the adiabatic effectiveness and heat transfer coefficient (HTC) increase due to the coolant injection, both issues should be investigated. In this paper detailed measurements of HTC and adiabatic effectiveness at different blowing ratios, between 0.50 and 2.50, for a single hole on a flat plate surface are presented. Results have been obtained for two laidback fan-shaped holes (called SAA and PAA) with different area ratio. In order to take into account the effects of pressure gradients caused by airfoil curvature, experiments are performed in two different mainstream flow conditions. The former without pressure gradient, the latter with a pressure gradient generated by an inclined opposite wall, with a positive acceleration parameter (K = 2.0·10−6 ). Both HTC and cooling effectiveness are measured using a steady state technique with wide band Thermo-chromic Liquid Crystals (TLC). A thin Inconel heating foil was used to generate a uniform surface heat flux for the HTC measurements. Results are presented in terms of detailed maps, centerline and spanwise averaged values.

Copyright © 2010 by ASME

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In