Numerical Simulation of Tip Leakage Flows in Axial Flow Turbines, With Emphasis on Flow Physics: Part II—Effect of Outer Casing Relative Motion

[+] Author and Article Information
J. Tallman, B. Lakshminarayana

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

J. Turbomach 123(2), 324-333 (Feb 01, 2000) (10 pages) doi:10.1115/1.1369113 History: Received February 01, 2000
Copyright © 2001 by ASME
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Bindon, J. P., 1991, private communication.
Bindon,  J. P., and Morphis,  G., 1992, “The Development of Axial Turbine Leakage Loss for Two Profiled Tip Geometries Using Linear Cascade Data,” ASME J. Turbomach., 114, No. 1, pp. 198–203.
Tallman, J. A., 1999, “Simulation of Tip Leakage Flows in a Turbine Rotor Using Computational Fluid Dynamics,” MS Thesis, The Pennsylvania State University.
McCarter,  A., Xiao,  X., Lakshminarayana,  B., 2000, “Tip Clearance Effects in a Turbine Rotor: Part 2—Velocity Field and Flow Physics,” ASME J. Turbomach., 123, pp. 306–313.


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Rotor inlet conditions from a simulated nozzle upstream
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Inlet velocity and turbulence profile comparison
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Particle traces through the passage and gap
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y-z plane at x=40 percent axial chord
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y-z plane at x=90 percent axial chord
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Velocity vectors in the blade-to-blade plane
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Static pressure coefficient (Cp) contours in the blade-to-blade plane at the blade tip
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Velocity in the gap and pressure (Cp) on the blade
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Aggregate mass flow through the gap
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Passage-averaged loss coefficient
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Streamwise vorticity contours for a measured and numerically simulated turbine



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