The Effects of Wake-Passing Unsteadiness Over a Highly Loaded Compressor-Like Flat Plate

[+] Author and Article Information
Xavier Ottavy, Stephane Vilmin, Howard Hodson

Whittle Laboratory, Cambridge University, Trumpington Street, Cambridge CB2 1PZ, UK

Simon Gallimore

Rolls-Royce plc, Moor Lane, Derby DE24 8BJ, UK

J. Turbomach 126(1), 13-23 (Mar 26, 2004) (11 pages) doi:10.1115/1.1643384 History: Received December 01, 2001; Revised March 01, 2002; Online March 26, 2004
Copyright © 2004 by ASME
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Grahic Jump Location
Boundary layer velocity profile as a function of time—Re=350,000—fred=0.75 and fred=1.5—shape 02
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Hot-wire data at 97.5% of Smax. Re=350,000 and fred=0.75—shape 02. Left: variance; center: evolution of displacement thickness (black) and momentum thickness (gray) for two wake periods; right: shape factor.
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Hot-wire data at 97.5% of Smax. Re=350,000 and fred=1.50—shape 02. Left: variance; center: evolution of displacement thickness (black) and momentum thickness (gray) for two wake periods; right: shape factor.
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Measured and predicted flow with forced transition at 10% Smax, Re=350,000—shape 02
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Summary of the experimental results. Left: results in terms of loss and lift; right: results in terms of loss and local diffusion factor (D). 1, 2, 3, 4 for shapes 01, 02, 03, 04, ★ for shape 02 “highly loaded” with Re=350,000 and fred=1.5.
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Tested velocity distributions
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View of the “wood box” with the plate and the polystyrene walls
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View of the two-dimensional mesh. 6156 nodes.
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Measured and simulated steady flow for shape 02, Re=350,000 PS means pressure side, SS means suction side
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Experimental Cp distributions with incoming wakes for Re=350,000 and Re=500,000—shape 02
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Hot film data, nondimensional quasi shear stress on the plate—Re=350,000 and fred=0.75—shape 02
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Hot-film data, nondimensional quasi shear stress on the plate—Re=350,000 and fred=1.5—shape 02



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