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TECHNICAL PAPERS

Experimental and Analytical Study of the Pressure Drop Across a Double-Outlet Vortex Chamber

[+] Author and Article Information
Ali M. Jawarneh1

Department of Mechanical Engineering,  The Hashemite University, Zarqa 13115, Jordanalijaw@yahoo.com

P. Sakaris, Georgios H. Vatistas

Department of Mechanical and Industrial Engineering,  Concordia University, 1455 de-Maisonneuve Blvd. West, Montreal H3G 1M8, Canada

1

Corresponding author.

J. Fluids Eng 129(1), 100-105 (Jun 08, 2006) (6 pages) doi:10.1115/1.2375131 History: Received March 09, 2005; Revised June 08, 2006

This paper presents experimental and analytical results concerning the pressure drop and the core size in vortex chambers. The new formulation is based on the conservation of mass and energy integral equations and takes into account the presence of two outlet ports. The diminishing vortex strength is introduced through the vortex decay factor. The influence of vortex chamber geometry, such as diameter ratio, aspect ratio, and Reynolds number, on the flow field have been examined and compared with the present experimental data. It is shown that the presence of the swirl velocity component makes the pressure drop across a vortex chamber significantly different than the familiar unidirectional pipe flow. When the chamber length is increased, the vortex diminishes under the action of friction, producing a weaker centrifugal force which leads to a further pressure drop. It is revealed that by increasing the Reynolds number, the cores expand resulting into a larger pressure coefficient. For a double-outlet chamber where the flow is divided into two streams, the last parameter is found to be less than that of a single-outlet.

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Copyright © 2007 by American Society of Mechanical Engineers
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Figures

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Figure 1

Experimental setup

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Figure 2

Vortex generator

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Figure 3

Outlet flow boundary conditions

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Figure 4

Inlet flow boundary condition

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Figure 5

Pressure drop coefficient at aspect ratio β=1.00 for different Reynolds numbers (11,592, 8694, 7245). The solid lines represent a double-outlet chamber while the dashed lines represent a single-outlet chamber.

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Figure 6

Pressure drop coefficient for aspect ratio β=1.45 for different Reynolds numbers (11,592, 8694, 7245)

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Figure 7

Dimensionless core size at aspect ratio β=1.00 for different Reynolds numbers (11,592, 8694, 7245)

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Figure 8

Exit volumetric fractions at different aspect ratios (1, 1.45) and Reynolds numbers (11,592, 8694, 7245)

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Figure 9

Pressure drop coefficient for different aspect ratios (1, 1.45, 2.9) for Reynolds number Reo=11,592

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Figure 10

Dimensionless core size for different aspect ratios (1, 1.45, 2.9) for Reynolds number Reo=11,592

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Figure 11

Exit volumetric fraction for different aspect ratios (1, 1.45, 2.9) for Reynolds number Reo=11,592

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