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TECHNICAL PAPERS

Tip Clearance Effects in a Turbine Rotor: Part II—Velocity Field and Flow Physics

[+] Author and Article Information
Andrew A. McCarter, Xinwen Xiao, Budugur Lakshminarayana

Center for Gas Turbines and Power, Pennsylvania State University, 153-J Hammond Bldg. University Park, PA 16802

J. Turbomach 123(2), 305-313 (Feb 01, 2000) (9 pages) doi:10.1115/1.1368880 History: Received February 01, 2000
Copyright © 2001 by ASME
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References

Xiao,  X., McCarter,  A., and Lakshminarayana,  B., 2000, “Tip Clearance Effects in a Turbine Rotor Part I: Pressure Fields and Losses,” ASME J. Turbomach., 123, pp. 296–304.
Yaras,  M. I., and Sjolander,  S. A., 1992, “Effects of Simulated Rotation on Tip Leakage in a Planar Cascade of Turbine Blades—Part I: Tip Gap Flow,” ASME J. Turbomach., 114, July, pp. 652–659.
Yaras,  M. I., and Sjolander,  S. A., 1992, “Effects of Simulated Rotation on Tip Leakage in a Planar Cascade of Turbine Blades: Part II—Downstream Flow Field and Blade Loading,” ASME J. Turbomach., 114, July, pp. 660–667.
Graham,  J. A. H., 1986, “Investigation of a Tip Clearance Cascade in a Water Analogy Rig,” ASME J. Turbomach., 108, Jan., pp. 38–46.
Yamamoto, A., Tominaga, J., Matsuunuma, T., and Outa, E., 1994, “Detailed Measurements of Three-Dimensional Flows and Losses Inside an Axial Flow Turbine Rotor,” ASME Paper No. 94-GT-348.
Yamamoto, A., Matsuunuma, T., and Outa, E., 1994, “Unsteady Endwall/Tip-Clearance Flows and Losses Due to Turbine Rotor-Stator Interaction,” ASME Paper No. 94-GT-461.
Lakshminarayana,  B., Zaccaria,  M., and Marathe,  B., 1995, “Structure of Tip Clearance Flow in Axial Compressors,” ASME J. Turbomach., 117, pp. 336–347.
Stauter, R. C., 1992, “Measurement of the Three Dimensional Tip Region Flow Field in an Axial Compressor,” ASME Paper No. 92-GT-211.
Morphis, G., and Bindon, J. P., 1994, “The Performance of a Low Speed One and a Half Stage Axial Turbine With Varying Rotor Tip Clearance and Tip Gap Geometry,” ASME Paper No. 94-GT-481.
Lakshminarayana,  B., Camci,  C., Halliwell,  I., Zaccaria,  M., 1996, “Design and Development of a Turbine Research Facility to Study Rotor-Stator Interaction Effects,” International Journal of Turbo and Jet Engines, 13, pp. 155–172.
Ristic,  D., Lakshminarayana,  B., and Chu,  S., 1999, “Three-Dimensional Flow Field Downstream of an Axial Flow Turbine Rotor,” J. Propul. Power 15, No. 2, March-April.
Ho,  Y., and Lakshminarayana,  B., 1996, “Computational Modeling of Three Dimensional Endwall Flow Through a Turbine Rotor With Strong Secondary Flows,” ASME J. Turbomach., 118, pp. 250–261.
Bindon,  J., 1989, “The Measurement and Formation of Tip Clearance Loss,” ASME J. Turbomach., 111, pp. 257–263.
Bindon, J. P., and Morphis, G., 1990, “The Development of Axial Turbine Leakage Loss for Two Profiles Tip Geometries Using Linear Cascade Data,” ASME Paper No. 90-GT-152.
Tallman,  J., and Lakshminarayana,  B., 2000, “Numerical Simulation of Tip Leakage Flows in Axial Flow Turbines, With Emphasis on Flow Physics—Part II: Effect of Outer Casing Relative Motion,” J. Turbomach., 123, pp. 324–333.
Chernobrovkin, A., 1999, “Numerical Simulation of Complex Turbomachinery Flow,” Ph.D. Thesis, Pennsylvania State University.
Anand,  A. K., and Lakshminarayana,  B., 1978, “An Experimental Study of Three-Dimensional Turbulent Boundary Layer and Turbulence Characteristics Inside a Turbomachinery Rotor Passage,” ASME J. Eng. Power, 100, No. 4, October.
Lakshminarayana, B., 1996, Fluid Mechanics and Heat Transfer of Turbomachinery, Chapter 5, John Wiley & Sons, Inc., New York.
Yamamoto,  A., 1988, “Endwall Flow/Loss Mechanisms in a Linear Turbine Cascade With Blade Tip Clearance,” ASME J. Turbomach., 111, pp. 264–275.

Figures

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Axial velocity (Wx/Um) in rotor passage
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Relative tangential velocity (Wθ/Um) in rotor passage
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Relative primary flow angle (β) in rotor passage
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Mass averaged relative primary flow angle
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Mass averaged axial velocity
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Area mass averaged vorticity shed by the tip leakage vortex
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Turbulence intensities in (s, n, r) coordinate
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Loss coefficient (ζ) in rotor passage
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Relative total velocity (W/Um) in rotor passage
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Relative secondary velocity vectors (Wsec) with axial vorticity (ωx/Ω) in background
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Shear stresses in the streamwise and radial directions

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