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TECHNICAL PAPERS

Boundary Layer Development in the BR710 and BR715 LP Turbines—The Implementation of High-Lift and Ultra-High-Lift Concepts

[+] Author and Article Information
R. J. Howell, H. P. Hodson, V. Schulte, R. D. Stieger

Whittle Laboratory, Cambridge University, Cambridge CB3 0DY, United Kingdom

Heinz-Peter Schiffer, F. Haselbach

Rolls-Royce Deutschland, GmbH, Dahlewitz 15827, Germany

N. W. Harvey

Turbine Systems, Rolls-Royce plc, Derby DE24 8BJ, UK

J. Turbomach 124(3), 385-392 (Jul 10, 2002) (8 pages) doi:10.1115/1.1457455 History: Received December 18, 2000; Online July 10, 2002
Copyright © 2002 by ASME
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References

Figures

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Comparison of predicted conventional lift. High-lift, and ultra-high-lift Mach number distributions (normalized); after Haselbach et al. 13
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A schematic diagram of wake-induced transition and separated flow transition
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Lift coefficient versus Mach number for a variety of blade profiles, including the high-lift profiles of the BR715 and BR710 demonstrator. The BR715UHL turbine achieves even high lift coefficients. After Haselbach et al. 13.
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NGV2 of the BR715UHL LP turbine showing the hot film array of sensors on the right hand aerofoil
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Time history traces of quasi wall shear stress for the cruise condition of the BR710 LP turbine
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ST diagrams of (a) nondimensional ensemble mean quasiwall shear stress, (b) nondimensional ensemble RMS, and (c) ensemble skew
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Raw hot film data from NGV2 of the BR715 LP turbine
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ST diagrams of (a) nondimensional ensemble mean quasi-wall shear stress, (b) nondimensional ensemble RMS, and (c) ensemble skew. Data is taken from NGV2 of the BR715 LP turbine.
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Variation of time mean (solid lines) and the envelope of the ensemble mean quasi-wall shear stress for NGV3 of the BR715 LP turbine
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ST diagrams of nondimensional ensemble mean quasi-wall shear stress from NGV3 of the BR715 LP turbine; CRUISE conditions
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Ensemble mean data for one revolution of Rotor 2 of the BR715 LP turbine
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Predicted (solid line) and measured (circles) static pressures on NGV3 of the BR715U LP turbine; CRUISE conditions. After Haselbach et al. 13
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Time history of the raw data
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Ensemble mean skew for to sensors showing the change in periodicity of the data as the flow travels downstream
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ST diagrams of (a) nondimensional ensemble mean quasi-wall shear stress, (b) nondimensional ensemble RMS, and (c) ensemble skew. Data is taken from NGV3 of the BR715U LP turbine.
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A comparison of low-speed and high-speed measurements of ensemble quasi-wall shear stress from various profiles

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