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TECHNICAL PAPERS

Improving the Efficiency of the Trent 500-HP Turbine Using Nonaxisymmetric End Walls—Part I: Turbine Design

[+] Author and Article Information
G. Brennan, N. W. Harvey, M. G. Rose, N. Fomison, M. D. Taylor

Turbine Systems, Rolls-Royce plc, Derby, UK

J. Turbomach 125(3), 497-504 (Aug 27, 2003) (8 pages) doi:10.1115/1.1450766 History: Received November 14, 2000; Online August 27, 2003
Copyright © 2003 by ASME
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References

Hartland, J. C., Gregory-Smith, D. G., Harvey, N. W., and Rose, M. G., 1999, “Non-Axisymmetric Turbine End Wall Design: Part II Experimental Validation,” ASME 99-GT-338.
Denton, J. D., 1993, “Loss Mechanisms in Turbomachines,” ASME 93-GT-435.
Hodson, H. P., and Dominy, R. G., 1986, “Three-Dimensional Flow in a Low Pressure Turbine Cascade at its Design Condition,” ASME 86-GT-106.
Sieverding, C. H., 1984, “Recent Progress in the Understanding of Basic Aspects of Secondary Flow in Turbine Blade Passages,” ASME 84-GT-78.
Walsh, J. A., and Gregory-Smith, D. G., 1989, “Inlet Skew and the Growth of Secondary Losses and Vorticity in a Turbine Cascade,” ASME 89-GT-65.
Kopper, F. C., Milano, R., and Vanco, M., 1980, “An Experimental Investigation of Endwalls Profiling in a Turbine Vane Cascade,” AIAA-80-1089.
Atkins, M. J., 1987, “Secondary Losses and End-Wall Profiling in a Turbine Cascade,” I Mech. E C225/87, pp. 29–42.
Dossena, V., Perdichizzi, A., and Savini, M., 1998, “The Influence of Endwall Contouring on the Performance of a Turbine Nozzle Guide Vane,” ASME 98-GT-71.
Morris, A. W. H., and Hoare, R. G., 1975, “Secondary Loss Measurements in a Cascade of Turbine Blades with Meridional Wall Profiling,” ASME 75-WA/GT-13.
Hartland, J. C., Gregory-Smith, D. G., and Rose, M. G., 1998, “Non-Axisymmetric Endwall Profiling in a Turbine Cascade,” ASME 98-GT-525.
Rose, M. G., 1994, “Non-Axisymmetric Endwall Profiling in the HP NGVs of an Axial Flow Gas Turbine,” ASME 94-GT-249.
Harvey, N. W., Rose, M. G., Taylor, M. D., Shahpar, S., Hartland, J., and Gregory-Smith, D. G., 1999, “Non-Axisymmetric Turbine End Wall Design: Part I Three-Dimensional Linear Design System,” ASME 99-GT-337.
Shahpar, S., and Lapworth, B. L., 1998, “A Forward and Inverse Three-Dimensional Linear Design System for Turbomachinery Applications,” 4th ECCOMASS Computational Fluid Dynamics Conference, Athens, Sept. 7–11.
Moore, J. G., 1985, “Calculation of 3D Flow without Numerical Mixing,” AGARD-LS-140 on 3D Computational Techniques Applied to Internal Flows in Propulsion Systems, pp. 8.1–8.15.
Gregory-Smith, D., 1982, “Secondary Flow and Losses in Axial Flow Turbines,” ASME 82-GT-19.

Figures

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Plot of control points along the mesh
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HP NGV with profiled end wall
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NGV variation in hub (a) radial height (m), (b) surface static pressure (Pa)
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Mass-averaged SKEH for NGV along axial direction; note: NGV trailing edge starts at axial position −2mm (not shown here)
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Contours of SKEH at NGV exit—(a) base, (b) PEW design
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Absolute whirl angle at NGV exit
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NGV isentropic Mach no. at 10 percent height
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HP rotor with profiled end walls
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Rotor hub variation in (a) radial height (m), (b) surface static pressure (Pa)
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HP rotor mass-averaged SKEH in axial direction; note: rotor trailing edge starts at axial position 28 mm  
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Contours of SKEH at rotor exit—(a) base (b) PEW design
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Relative whirl angle at rotor exit
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HP rotor hub isentropic Mach no. (10% height)

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