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TECHNICAL PAPERS

Air Entrainment Processes in a Circular Plunging Jet: Void-Fraction and Acoustic Measurements

[+] Author and Article Information
H. Chanson

Fluid Mechanics, Hydraulics and Environmental Engineering, Department of Civil Engineering, The University of Queensland, Brisbane QLD 4072, Australia   e-mail: h.chanson@uq.edu.au

R. Manasseh

CSIRO Thermal and Fluid Engineering, P.O. Box 56, Highett VIC 3190, Australiae-mail: richard.manasseh@dbce.csiro.au

J. Fluids Eng 125(5), 910-921 (Oct 07, 2003) (12 pages) doi:10.1115/1.1595672 History: Received October 16, 2001; Revised March 10, 2003; Online October 07, 2003
Copyright © 2003 by ASME
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References

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Figures

Grahic Jump Location
Vertical circular plunging jet apparatus. (a) Sketch of the apparatus, (b) high-speed photograph for V1=3.3 m/s,x1=0.1 m.
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Dimensionless distributions of void-fraction and bubble count. Dashed line is solution of Eq. (1). Tu1 is turbulence intensity based on longitudinal velocity fluctuations at jet impact. (a) Jet height, x1=20 mm, jet velocity V1=5.0 m/s, Tu1=0.35%. (b) Jet height x1=100 mm, jet velocity V1=3.5 m/s, Tu1=0.39%.
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Effect of the free jet length on the maximum void-fraction and bubble count. (a) Maximum void fraction, (b) maximum dimensionless bubble count.
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Acoustic spectra, jet height x1=5 mm after 16
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Bubble-size spectra, jet height x1=5 mm after 16
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Void-fraction, bubble count, and detailed bubble size spectrum, jet height x1=5 mm, speed V1=3.9 m/s. Dashed line in (a) is solution of Eq. (1). Tu1 is turbulence intensity based on longitudinal velocity fluctuations; (b) after 16.
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Bubble-size distribution, jet height x1=5 mm, speed V1=3.9 m/s (acoustic data after 16)
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Bubble count rates and diameters as a function of jet speed V1, jet height x1=5 mm (acoustic data)
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Acoustic spectra, jet height x1=100 mm
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Bubble-size spectra, jet height x1=100 mm
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Bubble count rates and diameters as a function of jet speed V1, jet height x1=100 mm

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