Measurements of discharge coefficients for five configurations of cylindrical film cooling hole geometries are presented. These comprise holes of varying angles of inclination 45, and 90 deg) and orientation 45, and 90 deg), which are tested over a wide range of engine-like conditions in terms of internal and external crossflow Mach numbers as well as pressure ratios Results show that discharge coefficients do not depend solely on hole geometry, but are also profoundly affected by the internal and external crossflow conditions. The effect of increasing the orientation angle on the discharge behavior is very similar to the effect of increasing the inclination angle. Both result in higher losses, particularly at the cooling hole inlet while the losses at the hole exit are only slightly affected.
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October 2001
Technical Papers
Effect of Crossflows on the Discharge Coefficient of Film Cooling Holes With Varying Angles of Inclination and Orientation
Michael Gritsch,
Michael Gritsch
ALSTOM Power, Gas Turbine Base Development, 5405 Baden-Da¨ttwil, Switzerland
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Achmed Schulz,
Achmed Schulz
Institut fu¨r Thermische Stro¨mungsmaschinen, Universita¨t Karlsruhe (TH), 76128 Karlsruhe, Germany
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Sigmar Wittig
Sigmar Wittig
Institut fu¨r Thermische Stro¨mungsmaschinen, Universita¨t Karlsruhe (TH), 76128 Karlsruhe, Germany
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Michael Gritsch
ALSTOM Power, Gas Turbine Base Development, 5405 Baden-Da¨ttwil, Switzerland
Achmed Schulz
Institut fu¨r Thermische Stro¨mungsmaschinen, Universita¨t Karlsruhe (TH), 76128 Karlsruhe, Germany
Sigmar Wittig
Institut fu¨r Thermische Stro¨mungsmaschinen, Universita¨t Karlsruhe (TH), 76128 Karlsruhe, Germany
Contributed by the International Gas Turbine Institute and presented at the 46th International Gas Turbine and Aeroengine Congress and Exhibition, New Orleans, Louisiana, June 4–7, 2001. Manuscript received by the International Gas Turbine Institute February 2001. Paper No. 2001-GT-134. Review Chair: R. Natole.
J. Turbomach. Oct 2001, 123(4): 781-787 (7 pages)
Published Online: February 1, 2001
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Received:
February 1, 2001
Citation
Gritsch, M., Schulz , A., and Wittig, S. (February 1, 2001). "Effect of Crossflows on the Discharge Coefficient of Film Cooling Holes With Varying Angles of Inclination and Orientation ." ASME. J. Turbomach. October 2001; 123(4): 781–787. https://doi.org/10.1115/1.1397306
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