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ADDITIONAL TECHNICAL PAPERS

The Effect of Uniform Blowing on the Flow Past a Circular Cylinder

[+] Author and Article Information
Lionel Mathelin, Françoise Bataille, André Lallemand

Institut National des Sciences Appliquées de Lyon, Centre de Thermique de Lyon, UMR 5008, Ba⁁t. S. Carnot, 20 av. A. Einstein, 69621 Villeurbanne cedex, France

J. Fluids Eng 124(2), 452-464 (May 28, 2002) (13 pages) doi:10.1115/1.1467919 History: Received September 25, 2000; Revised November 03, 2001; Online May 28, 2002
Copyright © 2002 by ASME
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References

Figures

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Schematic of the studied configuration.
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Grid used for most computations: 50,000 cells, triangular mesh, 20 D long and 10 D wide.
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Recirculation bubbles length evolution with the Reynolds number without blowing.
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Recirculation bubbles at Re=40. (a) F=0 %, (b) F=5 %.
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Evolution of the bubble shift with blowing for different Reynolds numbers. •, Re=20; ▪, Re=30; ▴, Re=35; ♦, Re=40.
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Evolution of the bubbles shift with the free stream temperature for different Reynolds numbers F=5 %; Tinj=20°C. •, Re=20; ▪, Re=30; ▴, Re=40.
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Secondary fluid path lines in the upstream part of the cylinder. Re=40. (a) holes model, (b) sources model.
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Near wake vorticity field. Re=3900, (a) F=0%, (b) F=10 %. The vorticity levels are indicated.
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Force coefficients time history records. Solid line: drag coefficient, dashed line: lift coefficient.
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Pressure coefficient along the cylinder surface as a function of blowing. Re=3900.
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Velocity magnitude vertical profile. θ=65 deg,Re=3900. Experimental values are the symbols and numerical results are the corresponding solid lines. •, F=0%; ▪, F=2%; ▴, F=5%.
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Velocity magnitude vertical profile. θ=105 deg,Re=3900. Experimental values are the symbols and numerical results are the corresponding solid lines. •, F=0%; ▪, F=2%; ▴, F=5%.
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Temperature normal profile at θ=65 deg for Re=3900. Solid line is for F=2%, mid-dash line for F=5% and dash line for F=10%.
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Shear stress evolution with blowing. Re=3900.
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Temperature field in the wake with the sources model. Re=3900,F=1%, T=473 K.
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Effectiveness along the cylinder periphery. Re=3900 From bottom to top: F=1, 2, 5%.
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Effectiveness as a function of blowing. θ=65 deg,Re=3900. Squares are the experimental data, circles are from the sources model and triangles are from the holes model.
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Strouhal number evolution with blowing. Re=3900.
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Static pressure transverse profile in the near wake. Re=3900,x/D=2.5. The curves are slightly shifted for visualization convenience. Solid line is F=0%, dash line is F=5%.
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Schematic of the pressure profile considered for the qualitative model.

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