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TECHNICAL PAPERS

Effect of Wake Disturbance Frequency on the Secondary Flow Vortex Structure in a Turbine Blade Cascade

[+] Author and Article Information
Christopher G. Murawski

Propulsion Directorate, Air Force Research Laboratory, USAF, Wright Patterson AFB, OH 45433

Kambiz Vafai

Department of Mechanical Engineering, The Ohio State University, Columbus, OH 43210

J. Fluids Eng 122(3), 606-613 (Mar 27, 2000) (8 pages) doi:10.1115/1.1287792 History: Received August 10, 1999; Revised March 27, 2000
Copyright © 2000 by ASME
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References

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Halstead, D. E., 1996, “Boundary Layer Development in Multi-Stage Low Pressure Turbines,” Ph.D. dissertation, Iowa State University.
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.
Qui, 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.
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Matsunuma, T., Abe, H, and Tsutsui, Y., 1999, “Influence of Turbine Intensity on Annular Turbine Stator Aerodynamics at Low Reynolds Numbers,” ASME Paper No. 99-GT-151.
Gregory-Smith,  D.G., Graves,  C. P., and Walsh,  J. A., 1988, “Growth of Secondary Losses and Vorticity in an Axial Turbine Cascade,” ASME J. Turbomach., 110, pp. 1–8.
Doorly,  D. J., 1988, “Modeling the Unsteady Flow in a Turbine Rotor Passage,” ASME J. Turbomach., 110, pp. 27–37.
Dullenkopf,  K., Shulz,  A., and Wittig,  S., 1991, “The Effect of Incident Wake Conditions on the Mean Heat Transfer on an Airfoil,” ASME J. Turbomach., 113, pp. 412–418.
Han,  J.-C., Zhang,  L., and Ou,  S., 1993, “Influence of Unsteady Wake on Heat Transfer Coefficient From a Gas Turbine Blade,” ASME J. Heat Transfer, 115, pp. 104–115.
Halstead, D. E., Wisler, D. C., Okiishi, T. H., Walker, G. J., Hodson, H. P., and Shin, H.-W., 1995, “Boundary Layer Development in Axial Compressors and Turbines Part 4 of 4: Computations and Analysis,” ASME Paper No. 95-GT464.
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Murawski,  C. G., and Vafai,  K., 1999, “Effect of Variable Axial Chord on a Low Pressure Turbine Blade,” AIAA J. Propulsion and Power, 15, pp. 667–674.
Murawski,  C. G., and Vafai,  K., 2000, “An Experimental Investigation of the Effect of Freestream Turbulence on the Wake of a Separated Low-Pressure Turbine Blade at Low Reynolds Numbers,” ASME J. Fluids Engineering, 122, pp. 431–433.
Incropera, F. W., and DeWitt, D. P., 1985, Fundamentals of Heat and Mass Transfer, 2nd ed., Wiley, New York.

Figures

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Secondary flow vortex structure at the Cascade Exit Plane
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Secondary flow vortex structure model
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Wake generator velocities with motor control set at (a) 10 percent, (b) 20 percent, (c) 50 percent, and (d) 80 percent
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Flow visualization with single wake passing event. (a) Undisturbed vortex structure; (b) one vortex structure intact and one vortex structure destroyed
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Flow visualization with multiple wake passing events. (a) Undisturbed vortex structure; (b) One vortex structure destroyed and one vortex structure intact; (c) Upstream wakes about to destroy vortex structures; (d) Upstream wakes destroying both vortex structures
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Multiple wake with vortex recovery flow model

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