0
TECHNICAL PAPERS

A Detailed Analysis of Film-Cooling Physics: Part I—Streamwise Injection With Cylindrical Holes

[+] Author and Article Information
D. K. Walters, J. H. Leylek

Department of Mechanical Engineering, Clemson University, Clemson, SC 29634

J. Turbomach 122(1), 102-112 (Feb 01, 1997) (11 pages) doi:10.1115/1.555433 History: Received February 01, 1997
Copyright © 2000 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Illustration of simulation hierarchy adopted for this study showing how each step builds upon the last
Grahic Jump Location
Schematic of the experimental test setup, including extent of the computational domain in the x,y, and z directions
Grahic Jump Location
Close-up of surface grid showing centerline plane (a) and bottom wall, film-hole, and plenum wall surfaces (b)
Grahic Jump Location
Centerline adiabatic effectiveness (a) and lateral variation of effectiveness at x/D=15 (b) show good agreement with experimental data
Grahic Jump Location
Velocity magnitude contours in the jet exit plane highlight competing mechanisms that influence the jet exit conditions
Grahic Jump Location
Velocity vectors (a) and gage pressure contours in Pa (b) for L/D=3.5 and M=1 show jet bent quickly in downstream direction and pressure gradient at the jet exit
Grahic Jump Location
Experimental profiles of velocity gradient ∂u/∂y show separate regions of flowfield downstream of jet exit along z=0 centerline
Grahic Jump Location
Profiles of z-direction vorticity for three cases highlight the computed existence of those regions found experimentally and shown in Fig. 7
Grahic Jump Location
Profiles of temperature gradient magnitude along the centerline show that the wake region is made up of coolant fluid
Grahic Jump Location
Coolant path lines show the movement of the fluid in the film-hole boundary layers beneath the core coolant fluid, creating the wake region
Grahic Jump Location
Velocity vectors in a constant x-coordinate plane at x/D=5 for M=1 show counterrotating vortex structure present in computational (a) and experimental (b) results
Grahic Jump Location
Illustration of the streamwise vorticity exiting the film hole in the boundary layers
Grahic Jump Location
Contours of streamwise (x-direction) vorticity show the vorticity exiting the film hole, resulting in the counterrotating structure shown in Fig. 11 above
Grahic Jump Location
Contours of turbulence level for the case of M=0.5 (a) and M=1 (b) at two downstream locations show the influence of two different sources of turbulence production
Grahic Jump Location
Temperature contours in Kelvin for M=0.5 (a) and M=1 (b) at two downstream locations highlight the pinching in of the crossflow fluid and the lift-off of the coolant core due to the secondary motion
Grahic Jump Location
Velocity contours downstream of near-field interaction show wakelike structure returning to boundary-layer-like flow
Grahic Jump Location
Experimental velocity contours show similar structure to the computed contours in Fig. 15
Grahic Jump Location
Temperature contours downstream of near-field interaction show diffusion of the coolant as the jet travels downstream
Grahic Jump Location
Velocity vectors along the centerline for the two-layer model case show a small reverse flow zone, which was not resolved in the wall function cases
Grahic Jump Location
Pathlines from the crossflow boundary layer top view (a) and side view (b) show saddle point and reverse flow downstream of the trailing edge
Grahic Jump Location
Temperature contours along downstream bottom wall highlight differences between simulations performed with wall functions (a) and two-layer model (b)
Grahic Jump Location
Centerline plot of adiabatic effectiveness shows significant difference between the results with different wall treatments immediately downstream of the trailing edge, but similar behavior farther downstream (M=1,DR=2)

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