Air bubble entrainment at plunging jet takes place when the jet impact velocity exceeds a critical velocity function of the inflow conditions. This study investigates scale effects affecting air entrainment and bubble dispersion at vertical circular plunging jets. Three scale models were used and detailed air-water measurements were performed systematically for identical Froude numbers. The results highlight significant scale effects when We1 < 1E+3 or V1/ur < 10. Bubble chord times were also measured and presented in terms of pseudo-bubble chord length which was found to overestimate real bubble chords by 10 to 30%. The data show pseudo-bubble chord sizes ranging from less than 0.5 mm to more than 10 mm. The average pseudo-chord sizes were between 5 and 7 mm.
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ASME 2002 Joint U.S.-European Fluids Engineering Division Conference
July 14–18, 2002
Montreal, Quebec, Canada
Conference Sponsors:
- Fluids Engineering Division
ISBN:
0-7918-3615-0
PROCEEDINGS PAPER
Similitude of Air Entrainment at Vertical Circular Plunging Jets Available to Purchase
Hubert Chanson,
Hubert Chanson
University of Queensland, Brisbane, QLD, Australia
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Shin-Ichi Aoki,
Shin-Ichi Aoki
Toyohashi University of Technology, Toyohashi, Japan
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Ashabul Hoque
Ashabul Hoque
Toyohashi University of Technology, Toyohashi, Japan
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Hubert Chanson
University of Queensland, Brisbane, QLD, Australia
Shin-Ichi Aoki
Toyohashi University of Technology, Toyohashi, Japan
Ashabul Hoque
Toyohashi University of Technology, Toyohashi, Japan
Paper No:
FEDSM2002-31024, pp. 467-472; 6 pages
Published Online:
February 24, 2009
Citation
Chanson, H, Aoki, S, & Hoque, A. "Similitude of Air Entrainment at Vertical Circular Plunging Jets." Proceedings of the ASME 2002 Joint U.S.-European Fluids Engineering Division Conference. Volume 1: Fora, Parts A and B. Montreal, Quebec, Canada. July 14–18, 2002. pp. 467-472. ASME. https://doi.org/10.1115/FEDSM2002-31024
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