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TECHNICAL PAPERS

Effect of Crossflows on the Discharge Coefficient of Film Cooling Holes With Varying Angles of Inclination and Orientation

[+] Author and Article Information
Michael Gritsch

ALSTOM Power, Gas Turbine Base Development, 5405 Baden-Dättwil, Switzerland

Achmed Schulz, Sigmar Wittig

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

J. Turbomach 123(4), 781-787 (Feb 01, 2001) (7 pages) doi:10.1115/1.1397306 History: Received February 01, 2001
Copyright © 2001 by ASME
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References

Hay,  N., and Lampard,  D., 1998, “Discharge Coefficient of Turbine Cooling Holes: A Review,” ASME J. Turbomach., 120, pp. 314–319.
Burd,  S. W., and Simon,  T. W., 1999, “Measurements of Discharge Coefficients in Film Cooling,” ASME J. Turbomach., 121, pp. 243–248.
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.
Hay,  N., Henshall,  S. E., and Manning,  A., 1994, “Discharge Coefficients of Holes Angled to the Flow Direction,” ASME J. Turbomach., 116, pp. 92–96.
Hay, N., Lampard, D., and Khaldi, A., 1994, “The Coefficient of Discharge of 30° Inclined Film Cooling Holes With Rounded Entries or Exits,” ASME Paper No. 94-GT-180.
Hay,  N., and Spencer,  A., 1992, “Discharge Coefficients of Cooling Holes With Radiused and Chamfered Inlets,” ASME J. Turbomach., 114, pp. 701–706.
Hay, N., and Lampard, D., 1995, “The Discharge Coefficient of Flared Film Cooling Holes,” ASME Paper No. 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., 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.
Wittig, S., Schulz, A., Gritsch, M., and Thole, K. A., 1996, “Transonic Film-Cooling Investigations: Effects of Hole Shapes and Orientations,” ASME Paper No. 96-GT-222.
Kline,  S. J., and McClintock,  F. A., 1953, “Describing Uncertainties in Single-Sample Experiments,” Mech. Eng. (Am. Soc. Mech. Eng.), 75, Jan., pp. 3–8.
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.
Gritsch,  M., Schulz,  A., and Wittig,  S., 1998, “Method of Correlating Discharge Coefficients of Film-Cooling Holes,” AIAA J., 36, pp. 976–980.
Rowbury, D. A., Oldfield, M. L. G., and Lock, G. D., 1997, “Engine Representative Discharge Coefficients Measured in an Annular Nozzle Guide Vane Cascade,” ASME Paper No. 97-GT-99.
Rowbury,  D. A., Oldfield,  M. L. G., and Lock,  G. D., 2001, “A Method for Correlating the Influence of External Crossflow on the Discharge Coefficients of Film Cooling Holes,” ASME J. Turbomach., 123, pp. 258–265.

Figures

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Film-cooling test section
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Definition of inclination and orientation angles
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Discharge coefficients of holes with varying inclination angles (α=30, 45, and 90 deg) and fixed orientation angle (γ=0 deg)
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Effect of internal crossflow for holes with different inclination angles: (a) α=30 deg, (b) α=45 deg, (c) α=90 deg
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Discharge coefficients of holes with varying orientation angles (γ=0, 45, and 90 deg) and fixed inclination angle (α=30 deg)
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Effect of internal crossflow for holes with different orientation angles: (a) γ=0 deg, (b) γ=45 deg, (c) γ=90 deg
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Normalized discharge coefficient for holes with different inclination angles: (a) effect of external crossflow, (b) effect of internal crossflow
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Normalized discharge coefficient for holes with different orientation angles: (a) effect of external crossflow, (b) effect of internal crossflow

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