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TECHNICAL PAPERS

Experimentally Verified Numerical Optimization of a Three-Dimensional Parametrized Turbine Vane With Nonaxisymmetric End Walls

[+] Author and Article Information
Marc G. Nagel, Ralf-D. Baier

MTU Aero Engines Aerodynamics Turbine/Compressor (TEAD), Dachauer Str. 665, 80995 München, Germany

J. Turbomach 127(2), 380-387 (May 05, 2005) (8 pages) doi:10.1115/1.1773848 History: Received December 01, 2002; Revised March 01, 2003; Online May 05, 2005
Copyright © 2005 by ASME
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References

Rechenberg, 1973.
LaFleur,  R. S., and Langston,  L. S., 1993, “Drag Reduction of a Cylinder/Endwall Junction Using the Ice Formation Method,” ASME J. Fluids Eng., 115.
Bischoff, H., 1983, Patentschrift DE 3202855 C1, MTU Motoren- und Turbinen Union, Munich.
Rose, M. G., 1994, “Non-Axisymmetric Endwall Profiling in the HP NGV’s of an Axial Flow Gas Turbine,” ASME Paper 94-GT-249.
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 Paper 99-GT338.
Rose, M. G., Harvey, N. W., Seaman P., Newman D. A., and McManus D., 2001, “Improving the Efficiency of the TRENT 500 HP Turbine Using Non-Axisymmetric End Walls: Part 2, Experimental Validation,” ASME Paper 2001-GT-0505.
Harvey, N. W., Brennan G., Newman, D. A., and Rose, M. G., 2002, “Improving Turbine Efficiency Using Non-Axisymmetric End Walls: Validation in the Multi-Row Environment and With Low Aspect Ratio Blading,” ASME Paper GT-2002-30337.
Hartland, J. C., and Gregory-Smith, D. G., 2002, “A Design Method for the Profiling of End Walls in Turbines,” ASME Paper GT-2002-30433.
Spellucci P.: DONLP2, User’s Guide, Technical University Darmstadt, FB4, AG8.
Gier, J., Ardey, S., Eymann, S., Reinmöller, U., and Niehuis, R., 2002, “Improving 3D Flow Characteristics in a Multistage LP Turbine by Means of Endwall Contouring and Airfoil Design Modification. Part 2: Numerical Simulation and Analysis,” ASME Paper 2002-GT-30353.
Abu-Ghannam,  B. J., and Shaw,  R., 1980, “Natural Transition of Boundary Layers—The Effects of Turbulence, Pressure Gradient, and Flow History,” J. Mech. Eng. Sci., 22(5).
Gier, J., Ardey, S., and Heisler, A., 2000, “Analysis of Complex Three-Dimensional Flow in a Three-Stage LP Turbine By Means of Transitional Navier-Stokes Simulation,” ASME 2000-GT-0645.
Nagel, M., Fottner, L., and Baier, R.-D., 2001, Optimization of Three Dimensionally Designed Turbine Blades and Side Walls, Bangalore ISABE-2001-1058.
Baier, R.-D., 2001, “Dreidimensionale Schaufelkanalgestaltung: Umfangskonturierung der Seitenwand von Turbinenbeschaufelungen,” MTUM-N01TPA-0007, MTU Aero Engines, Munich.
Duden, A., Raab, I., and Fottner, L., 1998, Controlling the Secondary Flows in a Turbine Cascade by 3D Airfoil Design and Endwall Contouring. ASME Paper 98-GT-72.
Duden, A., 1999, “Strömungsbeeinflussung zur Reduzierung der Sekundärströmungen in Turbinengittern,” dissertation, Universität der Bundeswehr München.

Figures

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Parameterization of aerofoil section
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Some principal radial stacking procedures
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Basic flow channel design options
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Curvature design by Bischoff 3
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Radial parameterization of two-dimensional aerofoil sections
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Axisymmetric end-wall profiling
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End-wall profiling between suction and pressure sides
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End-wall contour modulation in a rectangular domain
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Cascade T106 in HGK wind tunnel
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Loss minimized flow channel (Airfoil: T106Dopt)
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Instrumentation planes, pressure taps
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Comparison of profile pressure distributions numerical/experimental in four measurement planes
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Radial distribution of the outflow angle in circumferential direction (106D: initial; 106Dopt: optimized)
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Radial loss distribution (106D: initial; 106Dopt: optimized)
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Comparison of experimental and numerical distribution of total pressure loss at x/lax=1.5

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