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TECHNICAL PAPERS

Film-Cooled Turbine Endwall in a Transonic Flow Field: Part II—Heat Transfer and Film-Cooling Effectiveness

[+] Author and Article Information
Martin Nicklas

Institute of Propulsion Technology, German Aerospace Center (DLR), 37073 Göttingen, Germany

J. Turbomach 123(4), 720-729 (Feb 01, 2001) (10 pages) doi:10.1115/1.1397308 History: Received February 01, 2001
Copyright © 2001 by ASME
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References

Blair,  M. F., 1974, “An Experimental Study of Heat Transfer and Film Cooling on Large-Scale Turbine Endwalls,” ASME J. Heat Transfer, 96, pp. 524–529.
Gaugler,  R. E., and Russell,  L. M., 1984, “Comparison of Visualized Turbine Endwall Secondary Flows and Measured Heat Transfer Patterns,” ASME J. Eng. Gas Turbines Power, 106, pp. 168–172.
Takeishi,  K., Matsuura,  M., Aoki,  S., and Sato,  T., 1990, “An Experimental Study of Heat Transfer and Film Cooling on Low Aspect Ratio Turbine,” ASME J. Turbomach., 112, pp. 488–496.
Wedlake, E. T., Brooks, A. J., and Harasgama, S. P., 1988, “Aerodynamic and Heat Transfer Measurements on a Transonic Nozzle Guide Vane,” ASME Paper No. 88-GT-10.
Boyle,  R. J., and Russell,  L. M., 1990, “Experimental Determination of Stator Endwall Heat Transfer,” ASME J. Turbomach., 112, pp. 547–558.
York,  R. E., Hylton,  L. D., and Mihelc,  M. S., 1984, “An Experimental Investigation of Endwall Heat Transfer and Aerodynamics in a Linear Vane Cascade,” ASME J. Eng. Gas Turbines Power, 106, pp. 159–167.
Graziani,  R. A., Blair,  M. F., Taylor,  J. R., and Mayle,  R. E., 1980, “An Experimental Study of Endwall and Airfoil Surface Heat Transfer in a Large-Scale Turbine Blade Cascade,” ASME J. Eng. Gas Turbines Power, 102, pp. 257–267.
Harvey, N. W., Wang, Z., and Jones, T. V., 1990, “Detailed Heat Transfer Measurements in Nozzle Guide Vane Passages in Linear and Annular Cascades in the Presence of Secondary Flows,” AGARD CP-469, pp. 24/1–24/13.
Goldstein,  R. J., and Spores,  R. A., 1988, “Turbulent Transport on the Endwall in the Region Between Adjacent Turbine Blades,” ASME J. Heat Transfer, 110, pp. 862–869.
Friedrichs,  S., Hodson,  H. P., and Dawes,  W. N., 1996, “Distribution of Film-Cooling Effectiveness on a Turbine Endwall Measured Using the Ammonia and Diazo Technique,” ASME J. Turbomach., 118, pp. 613–621.
Burd, S. W., Satterness, C. J., and Simon, T. W., 2000, “Effects of Slot Bleed Injection over a Contoured End Wall on Nozzle Guide Vane Cooling Performance: Part II—Thermal Measurements,” ASME Paper No. 2000-GT-200.
Granser, D., and Schulenberg, T., 1990, “Prediction and Measurement of Film Cooling Effectiveness for a First-Stage Turbine Vane Shroud,” ASME Paper No. 90-GT-95.
Jabbari,  M. Y., Marston,  K. C., and Eckert,  E. R. G., 1996, “Film Cooling of the Gas Turbine Endwall by Discrete-Hole Injection,” ASME J. Turbomach., 118, pp. 278–284.
Teekaram,  A. J. H., Forth,  C. J. P., and Jones,  T. V., 1991, “Film Cooling in the Presence of Mainstream Pressure Gradients,” ASME J. Turbomach., 113, pp. 484–492.
Eckert,  E. R. G., 1992, “Similarity Analysis of Model Experiments for Film Cooling in Gas Turbines,” Waerme- Stoffuebertrag., 27, pp. 217–223.
Nicklas, M., 2000, “Filmgekühlte Turbinenplattform in transsonischem Strömungsfeld,” PhD thesis, Rheinisch-Westfälische Technische Hochschule Aachen; additionally published as DLR-FB 2000-10, Cologne.
Sachs, L., 1972, Statistische Auswerteverfahren, 3rd ed., Springer-Verlag.
Colantuoni, S., Colella, A., Di Nola, L. Carbone, D., and Marotta, D., 1993, “Aero-Thermal Design of a Cooled Transonic NGV and Comparison With Experimental Results,” AGARD Paper CP-527/33.
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Metzger,  D. E., Carper,  H. J., and Swank,  L. R., 1968, “Heat Transfer With Film Cooling Near Nontangential Injection Slots,” ASME J. Eng. Gas Turbines Power, 90, pp. 157–163.

Figures

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Linear dependence of heat flux on coolant temperature (Metzger 20)
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Endwall film-cooling arrangement and test conditions
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Basic arrangement of the test setup for IR-measurements at the EGG
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Practical arrangement of the test setup for IR-measurements at the EGG
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Positions on the endwall for data validation of h=f(Θ)
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Linear dependency between heat transfer ratio and nondimensional temperature at position 1 for slot coolant ejection
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Linear dependency hf/h0=f(Θ) at position 2 of Fig. 5 (7a) and position 3 of Fig. 5 (7b) for slot coolant ejection
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Linear dependency hf/h0=f(Θ) at Position 2: coolant ejection through (a) slot and all holes (b) all holes alone
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Heat transfer coefficient h0: unblown wall
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Heat transfer ratio hif/h0: comparison of film-cooled to unblown endwall; slot and all holes blowing
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Heat transfer ratio hif/h0: comparison of film-cooled to unblown endwall; slot coolant ejection
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Heat transfer ratio hif/h0: comparison of film-cooled to unblown endwall; all holes blowing simultaneously
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Heat transfer coefficient h0: unblown wall
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Heat transfer ratio hif/h0: comparison of film-cooled to unblown endwall; slot and all holes blowing
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Heat transfer ratio hif/h0: comparison of film-cooled to unblown endwall; slot coolant ejection
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Heat transfer ratio hif/h0: comparison of film-cooled to unblown endwall; all holes blowing simultaneously
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Comparison of different Mach numbers Ma2is=1.2 and Ma2isref=1.0 (without coolant ejection)
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Comparison of different blowing ratios M=50 percent and Mref=100 percent
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Film-cooling effectiveness ηf: slot and all holes blowing simultaneously
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Film-cooling effectiveness ηf: slot coolant ejection
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Film-cooling effectiveness ηf: all holes blowing simultaneously
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Film-cooling effectiveness ηf: slot and all holes blowing simultaneously
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Film-cooling effectiveness ηf: slot coolant ejection
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Film-cooling effectiveness ηf: all holes blowing simultaneously

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