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TECHNICAL PAPERS

Heat Flux Reduction From Film Cooling and Correlation of Heat Transfer Coefficients From Thermographic Measurements at Enginelike Conditions

[+] Author and Article Information
S. Baldauf, M. Scheurlen

Siemens Power Generation, 45473 Mülheim an der Ruhr, Germany

A. Schulz, S. Wittig

Lehrstuhl und Institut für Thermische Strömungsmaschinen, Universität Karlsruhe (TH), 76128 Karlsruhe, Germany

J. Turbomach 124(4), 699-709 (Nov 07, 2002) (11 pages) doi:10.1115/1.1505848 History: Received October 29, 2001; Online November 07, 2002
Copyright © 2002 by ASME
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References

Baldauf,  S., Schulz,  A., and Wittig,  S., 2001, “High Resolution Measurements of Local Heat Transfer Coefficients From Discrete Hole Film Cooling,” ASME J. Turbomach., 123, pp. 749–757.
Baldauf,  S., Schulz,  A., and Wittig,  S., 2001, “High-Resolution Measurements of Local Effectiveness From Discrete Hole Film Cooling,” ASME J. Turbomach., 123, pp. 758–765.
Metzger,  D. E., Carper,  H. J., and Swank,  L. R., 1968, “Heat Transfer With Film Cooling Near Nontangential Injection Slots,” ASME J. Eng. Power, 80, pp. 157–163.
Metzger,  D. E., and Fletcher,  D. D., 1971, “Evaluation of Heat Transfer for Film-Cooled Turbine Components,” ASME J. Eng. Power, 8, pp. 181–184.
Metzger,  D. E., Carper,  H. J., and Warren,  J. M., 1972, “Predicted Film Cooling Near Flush Slots-Comparison With Experiment,” J. Aircr., 9, pp. 857–863.
Choe, H., Kays, W. M., and Moffat, R. J., 1974, “The Superposition Approach to Film-Cooling,” ASME Paper 74-WA/HT-27.
Loftus,  P. J., and Jones,  T. V., 1983, “The Effect of Temperature Ratios on the Film Cooling Process,” ASME J. Eng. Power, 105, pp. 615–620.
Forth, C. J. P., Loftus, P. J., and Jones, T. V., 1985, “The Effect of Density Ratio on the Film Cooling of a Flat Plate,” Heat Transfer and Cooling in Gas Turbines, AGARD-CP-390, Paper 10.
Teekaram,  A. J. H., Forth,  C. J. P., and Jones,  T. V., 1989, “The Use of Foreign Gas to Simulate the Effects of Density Ratios in Film Cooling,” ASME J. Turbomach., 111, pp. 57–62.
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Eckert,  E. R. G., 1984, “Analysis of Film Cooling and Full-Coverage Film Cooling of Gas Turbine Blades,” ASME J. Eng. Gas Turbines Power, 106, pp. 206–213.
Baldauf, S., and Scheurlen, M., 1996, “CFD Based Sensitivity Study of Flow Parameters for Engine Like Film Cooling Conditions,” ASME Paper 96-GT-310.
Martiny, M., Schiele, R., Gritsch, M., Schulz, A., and Wittig, S., 1996, “In Situ Calibration for Quantitative Infrared Thermography,” Quirt’96 Eurotherm No. 50, Stuttgart, Germany, Sept. 2–5.
Kays, W. M., and Crawford, M. E., 1980, Convective Heat and Mass Transfer, McGraw Hill, New York, NY.
Baldauf,  S., Scheurlen,  M., Schulz,  A., and Wittig,  S., 2002, “Correlation of Film-Cooling Effectiveness From Thermographic Measurements at Enginelike Conditions,” GT-2002-30180, ASME J. Turbomach., 124, pp. 686–698.
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Drost, U., Bölcs, A., and Hoffs, A., 1997, “Utilization of the Transient Liquid Crystal Technique for Film Cooling Effectiveness and Heat Transfer Investigations on a Flat Plate and a Turbine Airfoil,” ASME Paper 97-GT-26.
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Figures

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Extended hot wind tunnel scheme with cooling circuit
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Effect of the density ratio on the heat transfer augmentation
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Comparison with literature results
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Effect of the blowing angle on the heat transfer augmentation
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Effect of the hole spacing on the heat transfer augmentation
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Heat transfer through the diabatic wall
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Effect of the density ratio on the heat flux reduction
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Effect of the blowing angle on the heat flux reduction
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Effect of the hole spacing on the heat flux reduction
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Lateral mean values of the heat transfer augmentation on double logarithmic scales
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Correlation of the lateral mean heat transfer coefficients
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Comparison measurement versus correlation

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