0
research-article

Rib Turbulator Effects on Crossflow-Fed Shaped Film Cooling Holes

[+] Author and Article Information
Dale Fox

The University of Texas at Austin, 204 E. Dean Keeton St, Austin, TX 78712
dale.fox@utexas.edu

Fraser Jones

The University of Texas at Austin, 204 E. Dean Keeton St, Austin, TX 78712
me.fbjones@gmail.com

John McClintic

The University of Texas at Austin, 204 E. Dean Keeton St, Austin, TX 78712
johnwmcclintic@gmail.com

Dr. David G. Bogard

The University of Texas at Austin, 204 E. Dean Keeton St, Austin, TX 78712
dbogard@mail.utexas.edu

Dr. Tom Dyson

GE Global Research Center, 1 Research Circle, Schenectady, NY 12309
dyson@ge.com

Zachary Webster

GE Aviation, 1 Neumann Way, Cincinnati, OH 45125
zachary.webster@ge.com

1Corresponding author.

ASME doi:10.1115/1.4041673 History: Received September 19, 2018; Revised October 04, 2018

Abstract

Most studies of turbine airfoil film cooling in laboratory test facilities have used relatively large plenums to feed flow into the coolant holes. However, a more realistic inlet condition for the film cooling holes is a relatively small channel. Previous studies have shown that the film cooling performance is significantly degraded when fed by perpendicular internal crossflow in a smooth channel. In this study, angled rib turbulators were installed in two geometric configurations inside the internal crossflow channel, at 45° and 135°, to assess the impact on film cooling effectiveness. Film cooling hole inlets were positioned in both pre-rib and post-rib locations to test the effect of hole inlet position on film cooling performance. A test was performed independently varying channel velocity ratio and jet to mainstream velocity ratio. These results were compared to the film cooling performance of previously measured shaped holes fed by a smooth internal channel. The film cooling hole discharge coefficients and channel friction factors were also measured for both rib configurations with varying channel and inlet velocity ratios. Spatially-averaged film cooling effectiveness is largely similar to the holes fed by the smooth internal crossflow channel, but hole-to-hole variation due to inlet position was observed.

Copyright (c) 2018 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

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 Journal Articles
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