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TECHNICAL PAPERS

Effects of Bulk Flow Pulsations on Film Cooling With Compound Angle Holes: Heat Transfer Coefficient Ratio and Heat Flux Ratio

[+] Author and Article Information
In Sung Jung, Joon Sik Lee

Turbo and Power Machinery Research Center, School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742, Korea

P. M. Ligrani

Convective Heat Transfer Laboratory, Department of Mechanical Engineering, University of Utah, Salt Lake City, UT 84112-9208

J. Turbomach 124(1), 142-151 (Feb 01, 2001) (10 pages) doi:10.1115/1.1400110 History: Received February 01, 2001
Copyright © 2002 by ASME
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References

Arts,  T., and Bourguignon,  A. E., 1990, “Behavior of a Coolant Film With Two Rows of Holes Along the Pressure Side of a High-Pressure Nozzle Guide Vane,” ASME J. Turbomach., 112, pp. 512–521.
Ligrani,  P. M., Gong,  R., Cuthrell,  J. M., and Lee,  J. S., 1996, “Bulk Flow Pulsations and Film Cooling: Part 1, Injectant Behavior,” Int. J. Heat Mass Transf., 39, pp. 2271–2282.
Abhari,  R. S., and Epstein,  A. H., 1994, “An Experimental Study of Film Cooling in a Rotating Transonic Turbine,” ASME J. Turbomach., 116, pp. 63–70.
Ligrani,  P. M., Gong,  R., Cuthrell,  J. M., and Lee,  J. S., 1996, “Bulk Flow Pulsations and Film Cooling: Part 2, Flow Structure and Film Effectiveness,” Int. J. Heat Mass Transf., 39, pp. 2283–2292.
Ligrani,  P. M., Gong,  R., Cuthrell,  J. M., and Lee,  J. S., 1997, “Effects of Bulk Flow Pulsations on Film-Cooled Boundary Layer Structure,” ASME J. Fluids Eng., 119, pp. 56–66.
Sohn, D. K., and Lee, J. S., 1997, “The Effect of Bulk Flow Pulsations on Film Cooling from Two Rows of Holes,” ASME Paper No. 97-GT-129.
Jung, I. S., and Lee, J. S., 1998, “Effect of Bulk Flow Pulsations on Film Cooling From Spanwise Oriented Holes,” ASME Paper No. 98-GT-211.
Bell,  C. M., Ligrani,  P. M., Hull,  W. A., and Norton,  C. M., 1999, “Film Cooling Subject to Bulk Flow Pulsations: Effects of Blowing Ratio, Freestream Velocity, and Pulsation Frequency,” Int. J. Heat Mass Transf., 42, No. 23, pp. 4333–4344.
Ligrani,  P. M., and Bell,  C. M., 2001, “Film Cooling Subject to Bulk Flow Pulsations: Effects of Density Ratio, Hole Length-to-Diameter Ratio, and Pulsation Frequency,” Int. J. Heat Mass Transf., 44, pp. 2005–2009.
Mehendale,  A. B., and Han,  J.-C., 1992, “Influence of High Mainstream Turbulence on Leading Edge Film Cooling Heat Transfer,” ASME J. Turbomach., 114, pp. 707–715.
Sen,  B., Schmidt,  D. L., and Bogard,  D. G., 1996, “Film Cooling With Compound Angle Holes: Heat Transfer,” ASME J. Turbomach., 118, pp. 800–806.
Ligrani,  P. M., and Lee,  J. S., 1996, “Film Cooling From a Single Row of Compound Angle Holes at High Blowing Ratios,” Int. J. Rotating Mach., 2, pp. 259–267.
Jung,  I. S., and Lee,  J. S., 2000, “Effects of Orientation Angles on Film Cooling Over a Flat Plate: Boundary Layer Temperature Distributions and Adiabatic Film Cooling Effectiveness,” ASME J. Turbomach., 122, pp. 153–160.
Bell,  C. M., Hamakawa,  H., and Ligrani,  P. M., 2000, “Film Cooling From Shaped Holes,” ASME J. Heat Transfer, 122, No. 2, pp. 224–232.
Lee, J. S., and Jung, I. S., 2002, “Effects of Bulk Flow Pulsations on Film Cooling With Compound Angle Holes,” Int. J. Heat Mass Transf., accepted for publication.
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.
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.
Moffat,  R. J., 1988, “Describing the Uncertainties in Experimental Results,” Exp. Therm. Fluid Sci., 1, No. 1, pp. 3–17.

Figures

Grahic Jump Location
Schematic diagrams of: (a) the experimental apparatus used for heat transfer coefficient measurements, (b) the film hole geometry, and (c) the test surface, including the coordinate system
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Normalized, phase-averaged static pressure difference between the injectant plenum and the freestream: (a) f=8 Hz, (b) f=36 Hz
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Local surface heat transfer coefficient ratio distributions with and without imposed bulk flow pulsations at f=36 Hz for m=0.5: (a) β=0 deg, (b) β=30 deg, (c) β=60 deg, (d) β=90 deg
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Flow visualization results in an illuminated spanwise-normal plane located at x/D=4.3 for β=30-deg compound angle holes with m=0.7, (a) f=0 Hz, (b) f=0.5 Hz
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Spatially averaged surface heat transfer coefficient ratios with imposed bulk flow pulsations at f of 0 Hz, 8 Hz, and 36 Hz for m=0.5: (a) β=0 deg, (b) β=30 deg, (c) β=60 deg, (d) β=90 deg
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Normalized spatially averaged surface heat transfer coefficient ratios as dependent upon coolant Strouhal number Src and orientation angle β
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Local surface heat flux ratio distributions with and without imposed bulk flow pulsations at f=36 Hz for m=0.5: (a) β=0 deg, (b) β=30 deg, (c) β=60 deg, (d) β=90 deg
Grahic Jump Location
Spatially-averaged surface heat flux ratios with imposed bulk flow pulsations at f of 0 Hz, 8 Hz, and 36 Hz for m=0.5: (a) β=0, (b) β=30, (c) β=60, (d) β=90 deg
Grahic Jump Location
Normalized spatially averaged surface heat flux ratios as dependent upon coolant Strouhal number Src and orientation angle β

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