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TECHNICAL BRIEFS

An Experimental Investigation of the Effect of Freestream Turbulence on the Wake of a Separated Low-Pressure Turbine Blade at Low Reynolds Numbers

[+] Author and Article Information
C. G. Murawski

AFRL/PRTT, Bldg 18, 1950 Fifth Street, WPAFB, OH  45433-7251

K. Vafai

Ohio State University, Department of Mechanical Engineering, 206 W. 18th Avenue, Columbus, OH 43210-1107

J. Fluids Eng 122(2), 431-433 (Dec 20, 1999) (3 pages) doi:10.1115/1.483281 History: Received March 03, 1999; Revised December 20, 1999
Copyright © 2000 by ASME
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References

Sharma, O. P., Ni, R. H., and Tanrikut, S., 1994, “Unsteady Flows in Turbines-Impact on Design Procedure,” AGARD-LS-195, Paper No. 5.
Baughn, J. W., Butler, R. J., Byerley, A. R., and Rivir, R. B., 1995, “An Experimental Investigation of Heat Transfer, Transition and Separation on Turbine Blades at Low Reynolds Number and High Turbulence Intensity,” ASME Paper No. 95-WA/HT-25.
Qiu, S., and Simon, T. W., 1997, “An Experimental Investigation of Transition as Applied to Low Pressure Turbine Suction Surface Flows,” ASME Paper No. 97-GT-455.
Bons, J. P., Sondergaard, R., and Rivir, R. B., 1999, “Control of Low-Pressure Turbine Separation Using Vortex Generator Jets,” AIAA Paper No. 99-0367.
Murawski, C. G., Sondergaard, R., Rivir, R. B., Vafai, K., Simon, T. W., and Volino, R. J., 1997, “Experimental Study of the Unsteady Aerodynamics in a Linear Cascade with Low Reynolds Number Low Pressure Turbine Blades,” ASME Paper No. 97-GT-95.
Kline,  S. J., and McClintock,  F. A., 1953, “Describing Uncertainties in Single-Sample Experiments,” Mechanical Engineering, 75, pp. 3–8.
Gaster, M., 1966, “The Structure and Behavior of Laminar Separation Bubbles,” AGARD-CP-4, pp. 819–854.

Figures

Grahic Jump Location
Test apparatus schematic
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Surface static pressure survey
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Instantaneous velocity wake survey: (a) Re=100 k,Tu=1.1 percent, (b) Re=200 k,Tu=8.1 percent,
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Wake velocity survey for the average velocity and turbulence intensity

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