0
Research Papers

Effects of Orientation and Position of the Combustor-Turbine Interface on the Cooling of a Vane Endwall

[+] Author and Article Information
A. A. Thrift1

K. A. Thole

 Mechanical and Nuclear Engineering Department,Pennsylvania State University, State College, PA 16803,

S. Hada

 Mitsubishi Heavy Industries LTD,Takasago Machinery Works, Hyogo Japan 676-8686,

1

Corresponding author.

J. Turbomach 134(6), 061019 (Sep 04, 2012) (10 pages) doi:10.1115/1.4004817 History: Received July 09, 2011; Revised July 29, 2011; Published September 04, 2012; Online September 04, 2012

First stage, nozzle guide vanes and accompanying endwalls are extensively cooled by the use of film cooling through discrete holes and leakage flow from the combustor-turbine interface gap. While there are cooling benefits from the interface gap, it is generally not considered as part of the cooling scheme. This paper reports on the effects of the position and orientation of a two-dimensional slot on the cooling performance of a nozzle guide vane endwall. In addition to surface thermal measurements, time-resolved, digital particle image velocimetry (TRDPIV) measurements were performed at the vane stagnation plane. Two slot orientations, 90 deg and 45 deg, and three streamwise positions were studied. Effectiveness results indicate a significant increase in area averaged effectiveness for the 45 deg slot relative to the 90 deg orientation. Flowfield measurements show dramatic differences in the horseshoe vortex formation.

FIGURES IN THIS ARTICLE
<>
Copyright © 2012 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Depiction of the low speed, closed loop wind tunnel

Grahic Jump Location
Figure 2

Schematic of the linear vane cascade with the leakage slot at the nominal location and the TRDPIV setup

Grahic Jump Location
Figure 13

Area averaged effectiveness as a function of slot location for the 90 deg slot orientation with MFR = 1.0% and I = 2.8

Grahic Jump Location
Figure 9

Average flowfield vectors, streamlines, and contours of vorticity in the stagnation plane with MFR = 0.3% and I = 2.8 for the 90 deg orientation at x/Cax  = -0.17

Grahic Jump Location
Figure 3

Instantaneous flowfield vectors and contours of vorticity in the stagnation plane with no leakage flow showing the transition between two flow modes

Grahic Jump Location
Figure 4

Histogram of velocity probability density for no leakage flow at x/Cax  = −0.08 and (a) z/S = 0.0034 and (b) z/S = 0.054

Grahic Jump Location
Figure 5

Comparison of adiabatic effectiveness contours at several different mass flux ratios with I = 2.8 between the (a) 90 deg and (b) 45 deg slot orientations at x/Cax  = −0.17.

Grahic Jump Location
Figure 6

Average flowfield vectors, streamlines, and contours of vorticity in the stagnation plane with MFR = 1.0% and I = 2.8 for the (a) 90 deg and (b) 45 deg slot orientations at x/Cax  = −0.17

Grahic Jump Location
Figure 7

Instantaneous flowfield vectors, streamlines, and contours of vorticity in the stagnation plane with MFR = 1.0% and I = 2.8 for the 45 deg slot orientation at x/Cax  = −0.17 for three time instances

Grahic Jump Location
Figure 8

Average flowfield vectors, streamlines, and contours of vorticity in the stagnation plane with MFR = 0.7% and I = 2.8 for the (a) 90 deg and (b) 45 deg slot orientations at x/Cax  = −0.17

Grahic Jump Location
Figure 10

Area averaged effectiveness as a function of MFR for the 45 deg and 90 deg slot orientations at x/Cax  = −0.17 with I = 2.8

Grahic Jump Location
Figure 11

Comparison of adiabatic effectiveness contours for the 90 deg slot orientation at three different locations for MFR = 1.0% and I = 2.8

Grahic Jump Location
Figure 12

Average flowfield vectors, streamlines, and contours of vorticity in the stagnation plane with MFR = 1.0% and I = 2.8 at a slot location of (a) x/Cax  = −0.34 and (b) x/Cax  = −0.05

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