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TECHNICAL PAPERS

CFD Optimization of Cooling Air Offtake Passages Within Rotor Cavities

[+] Author and Article Information
Colin Young, Guy D. Snowsill

Rolls-Royce plc, Derby, DE24 8BJ England

J. Turbomach 125(2), 380-386 (Apr 23, 2003) (7 pages) doi:10.1115/1.1556405 History: Received January 23, 2002; Online April 23, 2003
Copyright © 2003 by ASME
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References

Brillert, Reichert, and Simon, 1999, “Calculation of Flow Losses in Rotating Passages of Gas Turbine Cooling Systems,” ASME Paper 99-GT-251.
ICEM CFD Tutorial Manual, 2000, Direct CAD Interfaces, Version 4.0, ICEM CFD, Mar.
ICEM CFD Tutorial Manual, 1999, Meshing Modules, Version 4.0, ICEM CFD, Feb.
Chew, and Snell, 1988, “Prediction of Pressure Distribution for Radial Inflow between Co-Rotating Discs,” ASME Paper 88-GT-127.
Chew, and Owen, 1989, “The Use of De-Swirl Nozzles to Reduce the Pressure Drop in a Rotating Cavity with Radial Inflow, Farthing,” ASME Paper 89-GT-184.
Chew, 1989, “A Theoretical Study of Ingress for Shrouded Rotating Disc Systems with Radial Outflow,” ASME Paper 89-GT-187.
Casey and Wintergerste, eds., 2000, European Research Community On Flow, Turbulence and Combustion (ERCOFTAC): CFD Best Practice Guidelines, Version 1.0, Jan.
Fluent 5 User’s Guide, 1998, Volumes 1–4, Fluent Inc.
Launder and Spalding, 1972, Lectures in Mathematical Modelling of Turbulence, Academic Press, London, England.
Launder,  and Spalding,  1974, The Numeric Computation of Turbulent Flows, Comput. Methods Appl. Mech. Eng., 3, pp. 269–289.

Figures

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Schematic diagram of a typical IP compressor offtake flow path
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Modeled region of the IP5 offtake
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Basic calculational mesh
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Typical moment coefficient history
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Variation of offtake swirl coefficient
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Static pressure contour plot
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Velocity magnitude contour plot
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Tangential velocity contours
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Radial velocity contours
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Comparison of cavity pressure difference predictions
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Typical slotted offtake cross section
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2A tangential velocity contours
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2A radial velocity contours
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4A tangential velocity contours
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4A radial velocity contours
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Comparison of offtake swirl uptake

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