0
Research Papers

Experimental Flow Structure Investigation of Compound Angled Film Cooling

[+] Author and Article Information
Vipluv Aga, Martin Rose

Institute for Energy Technologies, Department of Mechanical and Process Engineering,  ETH Zurich, CH-8092, Zurich, Switzerland

Reza S. Abhari

Institute for Energy Technologies, Department of Mechanical and Process Engineering,  ETH Zurich, CH-8092, Zurich, Switzerlandrabhari@ethz.ch

J. Turbomach 130(3), 031005 (May 02, 2008) (8 pages) doi:10.1115/1.2775491 History: Received July 27, 2006; Revised April 03, 2007; Published May 02, 2008

The experimental investigation of film-cooling flow structure provides reliable data for calibrating and validating a 3D feature based computational fluid dynamics (CFD) model being developed synchronously at the ETH Zurich. This paper reports on the flow structure of a film-cooling jet emanating from one hole in a row of holes angled 20 deg to the surface of a flat plate having a 45 deg lateral angle to the freestream flow in a steady flow, flat plate wind tunnel. This facility simulates a film-cooling row typically found on a turbine blade, giving engine representative nondimensionals in terms of geometry and operating conditions. The main flow is heated and the injected coolant is cooled strongly to obtain the requisite density ratio. All three velocity components were measured using a nonintrusive stereoscopic particle image velocimetry (PIV) system. The blowing ratio and density ratio are varied for a single compound angled geometry, and the complex three dimensional flow is investigated with special regard to vortical structure.

FIGURES IN THIS ARTICLE
<>
Copyright © 2008 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Definition of coordinate system and geometrical parameters

Grahic Jump Location
Figure 2

Schematic of the test rig

Grahic Jump Location
Figure 3

Schematic of the injection arrangement

Grahic Jump Location
Figure 4

Schematic and diagram of the stereoscopic PIV Mounting

Grahic Jump Location
Figure 5

Flow vectors and contours of normalized axial velocity at X=2 for different flow conditions

Grahic Jump Location
Figure 6

Streamwise vorticity isosurfaces with velocity streamlines for BR=2, DR=1, and IR=4

Grahic Jump Location
Figure 7

Streamwise vorticity isosurfaces with velocity streamlines for BR=2, DR=1.55, and IR=2.6

Grahic Jump Location
Figure 8

Normal vorticity for BR=2, DR=1 and BR=2, DR=1.55 at different vertical Z planes

Grahic Jump Location
Figure 9

Normal vorticity for BR=3, DR=1 and BR=3, DR=1.55 at different vertical Z planes

Grahic Jump Location
Figure 10

Horizontal velocity isosurfaces for U∕Um=0.95 and U∕Um=1.2 at BR=2, DR=1(a1) and (a2) and BR=2, DR=1.55(b1) and (b2)

Tables

Errata

Discussions

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