Full Content is available to subscribers

Subscribe/Learn More  >

The Influence the Number of Holes on Effusion Cooling Effectiveness for an X/D of 4.7

[+] Author Affiliations
H. I. Oguntade

Lagos State University, Lagos, Nigeria

G. E. Andrews, A. D. Burns, D. B. Ingham, M. Pourkashanian

University of Leeds, Leeds, UK

Paper No. GT2015-42248, pp. V05AT10A002; 15 pages
  • ASME Turbo Expo 2015: Turbine Technical Conference and Exposition
  • Volume 5A: Heat Transfer
  • Montreal, Quebec, Canada, June 15–19, 2015
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-5671-0
  • Copyright © 2015 by ASME


Conjugate heat transfer CFD predictions were made, using ANSYS FLUENT, of the effects of the number of holes per square metre of surface area, N, on effusion overall cooling effectiveness for square array holes with a pitch to diameter ratio, X/D, or 4.7. Nimonic 75 effusion walls 6.35mm thick were modelled at 770K crossflow at 27 m/s with 300K coolant. The computational procedures include the use of a gas tracer to predict the adiabatic film cooling, which was not measured in the hot wall experimental results, as well as the overall cooling effectiveness. The computational results of the overall cooling effectiveness differed from the experimental data by 2–12%, depending on N and G. The results showed that increasing N reduced the amount of coolant air mass flow, necessary to achieve a target overall cooling effectiveness of 0.7, by 50% for 26,910/m2 compared with 9688/m2. With a very low G of 0.18 kg/sm2 the highest N of 26,910/m2 was predicted to have an overall cooling effectiveness of 0.7 compared with 0.55 kg/sm2 for the lowest number of holes, 4306/m2. This is one of the lowest published coolant air mass flows for the design overall cooling effectiveness of 0.7, which gives acceptable metal temperatures under engine combustor conditions.

Copyright © 2015 by ASME
Topics: Cooling



Interactive Graphics


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

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