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TECHNICAL PAPERS

Effect of Internal Coolant Crossflow on the Effectiveness of Shaped Film-Cooling Holes

[+] Author and Article Information
Michael Gritsch, Achmed Schulz, Sigmar Wittig

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

J. Turbomach 125(3), 547-554 (Aug 27, 2003) (8 pages) doi:10.1115/1.1580523 History: Received August 01, 1999; Revised March 04, 2003; Online August 27, 2003
Copyright © 2003 by ASME
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References

Goldstein,  R. J., Eckert,  E. R. G., and Burggraf,  F., 1974, “Effects of Hole Geometry and Density on Three-Dimensional Film Cooling,” Int. J. Heat Mass Transfer, 17, pp. 595–607.
Makki, Y. H., and Jakubowski, G., 1986, “An Experimental Study of Film Cooling From Diffused Trapezoidal Shaped Holes,” AIAA Paper 86-1326.
Hay, N., and Lampard, D., 1995, “The Discharge Coefficient of Flared Film Cooling Holes,” ASME Paper 95-GT-15.
Gritsch,  M., Schulz,  A., and Wittig,  S., 1998, “Discharge Coefficient Measurements of Film-Cooling Holes With Expanded Exits,” ASME J. Turbomach., 120, pp. 557–563.
Gritsch,  M., Schulz,  A., and Wittig,  S., 1998, “Adiabatic Wall Effectiveness Measurements of Film-Cooling Holes With Expanded Exits,” ASME J. Turbomach., 120, pp. 549–556.
Gritsch, M., Schulz, A., and Wittig, S., 1998, “Heat Transfer Coefficient Measurements of Film-Cooling Holes With Expanded Exits,” ASME Paper 98-GT-28.
Thole,  K. A., Gritsch,  M., Schulz,  A., and Wittig,  S., 1998, “Flowfield Measurements for Film-Cooling Holes With Expanded Exits,” ASME J. Turbomach., 120, pp. 327–336.
Hay,  N., Lampard,  D., and Benmansour,  S., 1983, “Effect of Crossflows on the Discharge Coefficient of Film Cooling Holes,” ASME J. Eng. Power, 105, pp. 243–248.
Gritsch,  M., Saumweber,  C., Schulz,  A., Wittig,  S., and Sharp,  E., 2000, “Effect of Internal Coolant Crossflow Orientation on the Discharge Coefficient of Shaped Film Cooling Holes,” ASME J. Turbomach., 122, pp. 146–153.
Thole,  K. A., Gritsch,  M., Schulz,  A., and Wittig,  S., 1997, “Effect of a Crossflow at the Entrance to a Film-Cooling Hole,” ASME J. Fluids Eng., 119, pp. 533–541.
Kohli, A., and Thole, K. A., 1997, “A CFD Investigation on the Effects of Entrance Crossflow Directions to Film-Cooling Holes,” Proc., 32nd National Heat Transfer Conference, Baltimore, MD, August 10–12.
Kohli, A., and Thole, K. A., 1998, “Entrance Effects on Diffused Film-Cooling Holes,” ASME Paper 98-GT-402.
Wittig, S., Schulz, A., Gritsch, M., and Thole, K. A., 1996, “Transonic Film-Cooling Investigations: Effects of Hole Shapes and Orientations,” ASME Paper 96-GT-222.
Martiny, M., Schiele, R., Gritsch, M., Schulz, A., and Wittig, S., 1996, “In Situ Calibration for Quantitative Infrared Thermography,” OIRT’96 Eurotherm Seminar No. 50, Stuttgart, Germany, September 2–5.
Schmidt,  D. L., Sen,  B., and Bogard,  D. G., 1996, “Film Cooling With Compound Angle Holes: Adiabatic Effectiveness,” ASME J. Turbomach., 118, pp. 807–813.

Figures

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Effect of internal coolant crossflow Mach number Mac on the local film-cooling effectiveness distribution for the fan-shaped hole
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Effect of internal coolant crossflow Mach number Mac on local film-cooling effectiveness distribution for the laid-back fan-shaped hole
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Position of the local effectiveness maximum at x/D=3
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Laterally averaged effectiveness for the cylindrical hole
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Laterally averaged effectiveness for the fan-shaped hole
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Laterally averaged effectiveness for the laid-back hole
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Effect of the blowing ratio on the spatially averaged film-cooling effectiveness
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Film-cooling test section
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(a) Cylindrical, (b) fan-shaped, and (c) laid-back fan-shaped film-cooling hole geometries
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Effect of internal coolant crossflow Mach number Mac on the local film-cooling effectiveness distribution for the cylindrical hole

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