Numerical Simulation of Tip Leakage Flows in Axial Flow Turbines, With Emphasis on Flow Physics: Part I—Effect of Tip Clearance Height

[+] 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), 314-323 (Feb 01, 2000) (10 pages) doi:10.1115/1.1368881 History: Received February 01, 2000
Copyright © 2001 by ASME
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Grid (every other gridline shown)
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Fluid pathlines through the turbine
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Leakage flow through the gap (1.0 percent case)
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Leakage fluid upstream of the blade
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Secondary velocity vectors in the y-z plane at X=90 percent axial chord
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Secondary vorticity contours in the y-z plane at X=90 percent axial chord
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Total pressure contours in the Y-Z plane at X=90 percent axial chord
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Static pressure coefficient (Cp) contours in the blade-to-blade plane: Z=Blade tip
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Velocity vectors in the blade-to-blade plane
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Aggregate mass flow through the gap
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Passage averaged loss coefficient values through the passage




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