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TECHNICAL PAPERS

The Application of Ultra High Lift Blading in the BR715 LP Turbine

[+] Author and Article Information
Frank Haselbach, Heinz-Peter Schiffer, Manfred Horsman, Stefan Dressen

Rolls-Royce Deutschland, D-15827 Dahlewitz, Germany

Neil Harvey, Simon Read

Turbine Systems, Rolls-Royce plc, Derby, United Kingdom

J. Turbomach 124(1), 45-51 (Feb 01, 2001) (7 pages) doi:10.1115/1.1415737 History: Received February 01, 2001
Copyright © 2002 by ASME
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References

Cobley, K., Coleman, N., Siden, G., and Arndt, N., 1997, “Design of New Three Stage Low Pressure Turbine for the BMW Rolls-Royce BR715 Engine,” ASME Paper No. 97-GT-419.
Harvey,  N. W., Cox,  J. C., Schulte,  V., Howell,  R., and Hodson,  H. P., 1999, “The Role of Research in the Aerodynamic Design of an Advanced Low-Pressure Turbine,” Proc. Inst. Mech. Eng., Part C: J. Mech. Eng. Sci., 213, Part A.
Hourmouziadis, J., 1989, “Aerodynamic Design of Low Pressure Turbines,” AGARD Lecture Series, 167.
Hodson,  H. P., Huntsman,  I., and Steele,  A., 1994, “An Investigation of Boundary Layer Development in a Multistage LP Turbine,” ASME J. Turbomach., 116, pp. 375–383.
Hodson, H. P., Banieghbal, M. R., and Dailey, G. M., 1994, “The Analysis and Prediction of the Effects of Bladerow Interactions in Axial Flow Turbines,” IMechE Conf. Turbomachinery, Oct.
Banieghbal, M. R., Curtis, E. M., Denton, J. D., Hodson, H. P., Huntsman, I., Schulte, V., Harvey, N. W., and Steele, A. B., 1995, “Wake Passing in LP Turbine Blades,” AGARD CP-571.
Curtis,  E. M., Hodson,  H. P., Banieghbal,  M. R., Denton,  J. D., Howell,  R. J., and Harvey,  N. W., 1997, “Development of Blade Profiles for LP Turbine Applications,” ASME J. Turbomach., 119, pp. 531–538.
Schulte, V., and Hodson, H. P., 1994, “Wake Separation Bubble Interaction in Low Pressure Turbines,” Paper No. AIAA-94-2931.
Schulte,  V., and Hodson,  H. P., 1998, “Unsteady Wake-Induced Boundary Layer Transition in High Lift LP Turbines,” ASME J. Turbomach., 120, pp. 28–35.
Schulte,  V., and Hodson,  H. P., 1998, “Prediction of the Becalmed Region for LP Turbine Profile Design,” ASME J. Turbomach., 120, pp. 839–846.
Halstead,  D. E., Wisler,  D. C., Okiishi,  T. H., Walker,  G. J., Hodson,  H. P., and Shin,  H. W., 1997, “Boundary Layer Development in Axial Compressors and Turbines. Parts 1–4,” ASME J. Turbomach., 119, pp. 114–126.
Hodson, H. P., 1998, “Blade Row Interactions in Low Pressure Turbines,” VKI Lecture Series 1998-02, “Blade Row Interference Effects in Axial Flow Turbomachinery Stages.”
Hodson, H. P., and Howell, R. J., 2000, “Unsteady Flow: Its Role in the Low Pressure Turbine,” Minnowbrook III, Workshop on Boundary Layer Transition in Turbomachines, Syracuse University.
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Howell,  R. J., Ramesh,  O. N., Hodson,  H. P., Harvey,  N. W., and Schulte,  V., 2001, “High Lift and Aft Loaded Profiles for Low Pressure Turbines,” ASME J. Turbomach., 123, pp. 181–188.
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Figures

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Static pressure readings from surface tapping versus 3D-CFD results: (a) NGV2 10 percent height, (b) 50 percent height, and (c) 90 percent height
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Static pressure readings from surface tapping versus 3D-CFD results: NGV3 50 percent height
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Off-design performance of high lift versus ultra high lift LPT (100 and 120 percent N/Nd)
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Midheight sections of HL and UHL designs
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Visualization of the pressure side flow of: (a) NGV2 and (b) NGV3 of the BR715 UHL Rig based on 3D-CFD solutions
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Lift coefficients versus Mach number of several LP Turbines
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Munich bar passing cascade 14
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Nondimensional total pressure losses 14
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Cambridge bar passing cascade 16
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Nondimensional total pressure loss versus Reynolds number for datum and UHL profiles (U1, U2) 16
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Comparison of conventional, high lift, and UHL Mach number distributions (normalized)
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Photograph of a segment of NGV2
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Schematic sketch of the rig test setup
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Turbine efficiency versus normalized Reynolds number for HL and UHL blading

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