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TECHNICAL PAPERS

Experimental Study of the Flow in a Compact Heat Exchanger Channel With Embossed-Type Vortex Generators

[+] Author and Article Information
F. Dupont, C. Gabillet, P. Bot

Institut de Recherche de l’Ecole-Navale, F29240 Brest-Naval, France

J. Fluids Eng 125(4), 701-709 (Aug 27, 2003) (9 pages) doi:10.1115/1.1595675 History: Received April 04, 2002; Revised March 03, 2003; Online August 27, 2003
Copyright © 2003 by ASME
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References

Figures

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Top view of the experimental facility
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Geometry of the channel with mounted embossed-like vortex generators. All dimensions are in millimeters. Pairs of generators are arranged in four lines (streamwise horizontal direction: x) and four columns (transverse vertical direction y).
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Vortex visualization by dye injection, for Re=1000, behind a generator of the first column
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Iso-values (%) of mean vertical velocity component V/Uq×100, for Re=1000 (a,b,c), Re=2000 (d,e,f), and Re=5000 (g,h,i) behind the 2nd column at three streamwise cross sections (Oz,Oy)
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Iso-values (%) of mean longitudinal velocity component U/Uq×100, for Re=1000 (a,b,c), Re=2000 (d,e,f), and Re=5000 (g,h,i) behind the 2nd column at three streamwise cross sections (Oz,Oy)
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Mean velocity field in the cross section, for Re=1000 (a,b,c), Re=2000 (d,e,f), and Re=5000 (g,h,i) behind the 2nd column at three streamwise cross sections (Oz,Oy)
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Iso-values (%) of rms vertical (a) and rms longitudinal (b) velocity components, for Re=2000, behind the 2nd column, at x/H=11.1
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Example of power spectral density of the transverse velocity fluctuations v, recorded at x/H=19.1,y/H=−48.1,z/H=−82.4, for Re=2000, with a sampling frequency of 100 Hz
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Average kinetic energy of the fluctuating motion k/(1/2)Uq2 behind successive generators, at d/H=2.4 downstream of each generator
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Vortex maximal tangential velocity downstream of the 2nd column
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Vortex core size 2a/H downstream of the 2nd column
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Vortex intensity Γ/UqH downstream of the 2nd column
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Vortices core size 2a/H behind different columns, at d/H=2.4 downstream of each generator
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Vortex circulation Γ/UqH behind different columns, at d/H=2.4 downstream of each generator

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