This paper presents the combined effects of high turbulence and film cooling on the dispersion of a simulated hot streak as it passes over a scaled-up nozzle guide vane. Experimental data demonstrates a considerable decay in the strength of a hot streak due to turbulence effects alone. Film cooling further reduces the peak temperature values resulting in a reduction of the peak temperature in the hot streak on the order of 75% relative to the upstream peak temperature in the hot streak. Comparisons are made between high turbulence and moderate turbulence as well as between different blowing conditions for the suction side, showerhead, and pressure side film cooling holes on a simulated nozzle guide vane.
Issue Section:
Technical Papers
Keywords:
nozzles,
turbulent diffusion,
temperature distribution,
gas turbines,
film flow,
cooling,
boundary layer turbulence
Topics:
Film cooling,
Pressure,
Suction,
Temperature,
Turbulence,
Coolants,
Turbines,
Flow (Dynamics)
1.
Dorney
, D. J.
, Gundy-Burlet
, K. L.
, and Sondak
, D. L.
, 1999
, “Survey of Hot Streak Experiments and Simulations
,” International J of Turbo and Jet Engines
, 16
(1
), pp. 1
–15
.2.
Schwab, J. R., Stabe, R. G., and Whitney, W. J., 1983, “Analytical and Experimental Study of Flow Through an Axial Turbine Stage With Nonuniform Inlet Radial Temperature Profiles,” NASA Technical Memorandum 83431, AIAA 83-1175.
3.
Stabe, R. G., Whitney, W. J., and Moffitt, T. P., 1984, “Performance of a High-Work Low Aspect Ratio Turbine Tested With a Realistic Inlet Radial Temperature Profile,” NASA Technical Memorandum 83655, AIAA Paper No. 84-1161.
4.
Butler
, T. L.
, Sharma
, O. P.
, Joslyn
, H. D.
, and Dring
, R. P.
, 1989
, “Redistribution of an Inlet Temperature Distortion in an Axial Flow Turbine Stage
,” J. Propul. Power
, 5
(1
), pp. 64
–71
.5.
Shang, T., Guenette, G. R., Epstein, A. H., and Saxer, A. P., 1995, “The Influence of an Inlet Temperature Distortion on Rotor Heat Transfer in a Transonic Turbine,” AIAA Paper 95-3042.
6.
Shang, T., and Epstein, A. H., 1996, “Analysis of Hot Streak Effects on Turbine Rotor Heat Load,” ASME Paper No. 96-GT-118.
7.
Roback
, R. J.
, and Dring
, R. P.
, 1993
, “Hot Streaks and Phantom Cooling in a Turbine Rotor Passage: Part 1—Separate Effects
,” ASME J. Turbomach.
, 115
(4
), pp. 657
–666
.8.
Gundy-Burlet
, K. L.
, and Dorney
, D. J.
, 1997
, “Three-Dimensional Simulations of Hot Streak Clocking in a 1–1/2 Stage Turbine
,” International Journal of Turbo and Jet Engines
, 14
(3
), pp. 123
–132
.9.
Gundy-Burlet, K. L., and Dorney, D. J., 1998, “Effects of Radial Location on the Migration of Hot Streaks in a 1–1/2 Stage Turbine,” AIAA Paper Number 98-3578.
10.
Dorney
, D. J.
, 1997
, “Investigation of Hot Streak Temperature Ratio Scaling Effects
,” International J. of Turbo and Jet Engines
, 14
, pp. 217
–227
.11.
Polanka, M. D., 1999, “Detailed Film Cooling Effectiveness and Three Component Velocity Field Measurements on a First Stage Turbine Vane Subject to High Freestream Turbulence,” Ph.D. dissertation, The University of Texas at Austin.
12.
Cutbirth, J. M., and Bogard, D. G., 2002, “Evaluation of Pressure Side Film Cooling with Flow and Thermal Field Measurements, Part I: Showerhead Effects,” ASME Paper No. GT-2002-30174.
13.
Kuotmos
, P.
, and McQuirk
, J. J.
, 1989
, “Isothermal Flow in a Gas Turbine Combustor—A Benchmark Experimental Study
,” Exp. Fluids
, 7
, pp. 344
–354
.14.
Cutbirth, J. M., 2000, “Turbulence and Three-Dimensional Effects on the Film Cooling of a Turbine Vane,” Ph.D. dissertation, The University of Texas at Austin.
15.
Thole, K. A., 2003, personal communication.
Copyright © 2004
by ASME
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