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TECHNICAL PAPERS: Gas Turbines: Heat Transfer and Turbomachinery

Discharge Coefficients of Rotating Short Orifices With Radiused and Chamfered Inlets

[+] Author and Article Information
M. Dittmann, K. Dullenkopf, S. Wittig

Lehrstuhl und Institut für Thermische Strömungsmaschinen, University of Karlsruhe, 76128 Karlsruhe, Germany

J. Eng. Gas Turbines Power 126(4), 803-808 (Nov 24, 2004) (6 pages) doi:10.1115/1.1771685 History: Received October 01, 2002; Revised March 01, 2003; Online November 24, 2004
Copyright © 2004 by ASME
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References

Kutz,  K. J., and Speer,  T. M., 1994, “Simulation of the Secondary Air System of Aero Engines,” ASME J. Turbomach., 116, pp. 306–315.
Lichtarowicz,  A., Duggins,  R. K., and Markland,  E., 1965, “Discharge Coefficients for Incompressible Non-Cavitating Flow Through Long Orifices,” J. Mech. Eng. Sci., 7(2), pp. 210–219.
Hay,  N., and Spencer,  A., 1992, “Discharge Coefficients of Cooling Holes With Radiused and Chamfered Inlets,” ASME J. Turbomach., 114, pp. 701–706.
Rhode, J. E., Richards, H. T., and Metger, G. W., 1969, “Discharge Coefficients for Thick Plate Orifices With Approach Flow Perpendicular and Inclined to the Orifice Axis,” Tech. Rep. NASA-TN-D-5467.
McGreehan,  W. F., and Schotsch,  M. J., 1988, “Flow Characteristics of Long Orifices With Rotation and Corner Radiusing,” ASME J. Turbomach., 110, pp. 213–217.
Samoilovich,  G. S., and Morozov,  B. I., 1957, “Coefficients of Flow Through Pressure Equalizing Holes in Turbine Discs,” Teploenergetica,8, pp. 16–23.
Meyfarth,  P. F., and Shine,  A. J., 1965, “Experimental Study of Flow Through Moving Orifices,” J. Basic Eng., 87, pp. 1082–1083.
Wittig,  S., Kim,  S., Jakoby,  R., and Weißert,  I., 1996, “Experimental and Numerical Study of Orifice Discharge Coefficients in High Speed Rotating Disks,” ASME J. Turbomach., 118(2), pp. 400–407.
Weißert, I., 1997, “Numerische Simulation dreidimensionaler Strömungen in Sekundärluftsystemen von Gasturbinen unter besonderer Berücksichtigung der Rotation,” Ph.D. thesis, Lehrstuhl und Institut für Thermische Strömungsmaschinen, Universität Karlsruhe (TH).
Zimmermann, H., Kutz, J., and Fischer, R., 1998, “Air System Correlations Part 2: Rotating Holes and Two Phase Flow,” ASME-Paper 98-GT-207.
Idelchik, J. E., 1986, Handbook of Hydraulic Resistance, Springer-Verlag, Berlin.
Brillert, D., Reichert, A.-W., and Simon, H., 1999, “Calculation of Flow Losses in Rotating Passages of Gas Turbine Cooling Systems,” ASME Paper 99-GT-251.
Wittig, S., Kim, S., Scherer, T., Jakoby, R., and Weißert, I., 1995, “Durchfluß an rotierenden Wellen- und Scheibenbohrungen und Wärmeübergang an rotierenden Wellen,” Forschungsvereinigung Verbrennungskraftmaschinen (FVV), Abschlußbericht, Vorhaben Nr. 465 und 536, Heft 574.
Dittmann,  M., Geis,  T., Schramm,  V., Kim,  S., and Wittig,  S., 2002, “Discharge Coefficients of a Preswirl System in Secondary Air Systems,” ASME J. Turbomach., 124, pp. 119–124.
Nakayama, Y., 1988, Visualized Flow, Pergamon Press, Oxford, UK.

Figures

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Flow through stationary orifices, Nakayama 15
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Effect of orifice l/d and r/d for stationary configurations
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Flow through a rotating short orifice
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Comparison of experimental results and predicted values for radiused inlets
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Effect of orifice l/d on cD for radiused inlets
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Discharge coefficient defined in the absolute frame of reference, comparison of different correlations and experiments
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Discharge coefficients defined in the absolute and relative frame of reference
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Effect of orifice r/d and c/d on cD for l/d=0.4
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Effect of orifice r/d and c/d on cD for l/d=1.25
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Effect of inlet geometry for l/d=0.4

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