0

Full Content is available to subscribers

Subscribe/Learn More  >

Experimental Study on the Film Cooling Characteristics of the Cylindrical Holes Embedded in Sine-Wave Shaped Trench

[+] Author Affiliations
Jian-sheng Wei, Hui-ren Zhu, Cun-liang Liu, Hui Song, Cong Liu, Tong Meng

Northwestern Polytechnical University, Xi’an, China

Paper No. GT2016-56856, pp. V05CT19A017; 9 pages
doi:10.1115/GT2016-56856
From:
  • ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition
  • Volume 5C: Heat Transfer
  • Seoul, South Korea, June 13–17, 2016
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4980-4
  • Copyright © 2016 by ASME

abstract

Experimental investigation has been performed to study the film cooling performance of the cylindrical holes embedded in sine-wave shaped trench. The sine-wave shaped trench is got by changing the trailing edge of the transverse trench into sine-wave shape; the holes are located next to the peaks of the wave. The sine-wave shaped trench hole is expected to get a wider spread of the cooling jet in the span-wise direction. The film cooling effectiveness and discharge coefficient of the sine-wave shaped trench hole configurations with different trench depths (0.75D, 1D) and wave peaks (1D, 2D) have been measured using the transient thermal liquid measurement technique. The blowing ratio covers a range from 0.5 to 2.0. The transverse trench hole was also investigated as a basis of comparison. Thermal and hydrodynamic fields were investigated numerically using Reynolds Averaged Navier Stokes (RANS) simulations with realizable k-ε turbulence model and enhanced wall treatment. Results show that downstream the sine-wave shaped trench, the film cooling effectiveness is higher in the region between the holes. That’s due to the jet spread wider under the influence of the anti-counter-rotating vortices which caused by the sine-wave shape. With the increasing blowing ratio, the film cooling effectiveness of the sine-wave shaped trench hole increases. The larger trench depth produces higher film cooling effectiveness in the region between the holes. With the increasing wave peak, the film cooling effectiveness is increased in the region between the holes due to that more of the jet flows to the wave valley. The discharge coefficients of the sine-wave shaped trench configurations are higher than the transverse trench which means that the sine-wave shape trench has lower flow resistance.

Copyright © 2016 by ASME
Topics: Waves , Film cooling

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