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TECHNICAL PAPERS

Computational Design and Experimental Evaluation of Using a Leading Edge Fillet on a Gas Turbine Vane

[+] Author and Article Information
G. A. Zess, K. A. Thole

Mechanical Engineering Department, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061

J. Turbomach 124(2), 167-175 (Apr 09, 2002) (9 pages) doi:10.1115/1.1460914 History: Received December 07, 2000; Online April 09, 2002
Copyright © 2002 by ASME
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References

Langston,  L. S., 1980, “Crossflows in a Turbine Cascade Passage,” ASME J. Eng. Power, 102, pp. 866–874.
Kang,  M., Kohli,  A., and Thole,  K. A., 1999, “Heat Transfer And Flowfield Measurements in the Leading Edge Region of a Stator Vane Endwall,” ASME J. Turbomach., 121, pp. 558–568.
Kang,  M., and Thole,  K. A., 2000, “Flowfield Measurements in the Endwall Region of a Stator Vane,” ASME J. Turbomach., 122, pp. 458–466.
Kubendran, L. R., Bar-Sever, A., and Harvey, W. D., 1988, “Flow Control in a Wing/Fuselage Type Juncture,” AIAA Pap., AIAA-88-0614.
Eckerle,  W. A., and Langston,  L. S., 1987, “Horseshoe Vortex Formation Around a Cylinder,” ASME J. Turbomach., 109, pp. 278–285.
Pierce,  F. J., and Shin,  J., 1992, “The Development of a Turbulent Junction Vortex System,” ASME J. Fluids Eng., 114, pp. 559–565.
Praisner,  T. J., Seal,  C. V., Takmaz,  L., and Smith,  C. R., 1997, “Spatial-Temporal Turbulent Flow-Field and Heat Transfer Behavior in End-Wall Junctions,” Int. J. Heat Fluid Flow, 18, pp. 142–151.
Kubendran, L. R., and Harvey, W. D., 1985, “Juncture Flow Control Using Leading-Edge Fillets,” AIAA Pap., AIAA-85-4097.
Sung, C.-H., and Lin, C.-W., 1988, “Numerical Investigation on the Effect of Fairing on the Vortex Flows Around Airfoil/Flat—Plate Junctures,” AIAA Pap., AIAA-88-0615.
Sung, C.-H., Yang, C.-I., and Kubendran, L. R., 1988, “Control of Horseshoe Vortex Juncture Flow Using a Fillet,” Symp on Hydrodynamic Performance Enhancement for Marine Applications, Newport, RI.
Devenport, W. J., Simpson, R. L., Dewitz, M. B., and Agarwal, N. K., 1991, “Effects of a Strake on the Flow Past a Wing—Body Junction,” AIAA Pap., AAPRAQAIAA-91-0252.
Bernstein,  L., and Hamid,  S., 1995, “On the Effect of a Strake-Like Junction Fillet on the Lift and Drag of a Wing,” Aeronaut. J., Feb., pp. 39–52.
Sauer, H., Mueller, R., and Vogeler, K., 2000, “Reduction of Secondary Flow Losses in Turbine Cascades by Leading Edge Modifications at the Endwall,” ASME Paper, 2000-GT-0473.
Devenport,  W. J., Agarwal,  N. K., Dewitz,  M. B., Simpson,  R. L., and Poddar,  K., 1990, “Effects of a Fillet on the Flow Past a Wing—Body Junction,” AIAA J., 28, pp. 2017–2024.
Fluent User’s Guide, 1998, Version 5, Fluent Inc., NH.
Hermanson,  K., and Thole,  K. A., 2000, “Effect of Inlet Profiles on Endwall Secondary Flows,” J. Propul. Power, 16, pp 286–296.
Radomsky,  R., and Thole,  K. A., 2000, “Highly Turbulent Flowfield Measurements Around a Stator Vane,” ASME J. Turbomach., 122, pp. 255–262.
Radomsky,  R., and Thole,  K. A., 2002, “High Freestream Turbulence Effects in the Endwall Leading Edge Region,” (ASME Paper 2000-6T-202), ASME J. Turbomach., 124, pp. 107–118.
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Figures

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Schematic of the stator vane cascade
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Measurement and computational plane locations
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Boundary layer profiles measured upstream of vane
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Schematic illustrating an unsuccessful profile fillet (a) and the final fillet design (b) that was experimentally tested
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Comparison of measured and computed static pressure distributions for the filleted and unfilleted vane
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Measured velocity vectors in plane SP for the (a) filleted, (b) unfilleted vane and (c) computed velocity vectors for the filleted vane
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Computed total pressure profiles in plane SP for the (a) filleted and (b) unfilleted vane
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Contours of measured secondary kinetic energy for (a) filleted and (b) unfilleted vane
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Contours of measured secondary kinetic energy for (a) filleted and (b) unfilleted vane
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Streamlines of a (a) filleted and (b) unfilleted vane
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Comparisons of secondary velocities in Plane PS0 for the (a) measured, and (b) computed filleted vane, and (c) computed unfilleted vane. Also shown are the measured turbulent kinetic energy levels for PS0 (d).
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Secondary velocity vectors measured for the (a) filleted, and (b) unfilleted vane compared with the (c) predicted for filleted vane in PS1. Contours of measured turbulent kinetic energy levels in Plane PS1 for the (d) filleted, and (e) unfilleted vane.
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Secondary velocity vectors in plane SS1 for measurements of the (a) filleted vane and computations of the (c) filleted vane and measurements of the (d) unfilleted vane. Contours of turbulent kinetic energy are shown for the (b) filleted and (e) unfilleted vanes.
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Comparison of computed secondary flows (a,b) and vorticity (c,d) in plane SS2 for the filleted (a,c) and unfilleted (b,d) vane

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