Numerical Study of the Transition Between Reentrant Jet and Twin Vortex Flow Regimes in Ventilated Cavitation

Numerical Study of the Transition Between Reentrant Jet and Twin Vortex Flow Regimes in... Contrary to natural cavitation, ventilated cavitation is controllable and is not harmful. It is particularly used to reduce the drag of the hydraulic vehicles. The ventilated cavitation is characterized by various gas regimes. The mechanisms of ventilated cavitation are investigated in the present work with CFD based on a 2D solver. The attention is especially focused on the transition between the reentrant jet and twin vortex regimes. The results confirm that the product of ventilated cavitation number and Froude number is lower than 1 (σ c Fr < 1) in the twin vortex regime, while it is higher than 1 (σ c Fr > 1) in the reentrant jet regime, as reported in the literature. Further analysis shows that ventilated cavitation is significantly influenced by the natural cavitation number. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Marine Science and Application Springer Journals

Numerical Study of the Transition Between Reentrant Jet and Twin Vortex Flow Regimes in Ventilated Cavitation

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Publisher
Springer Journals
Copyright
Copyright © 2018 by Harbin Engineering University and Springer-Verlag GmbH Germany, part of Springer Nature
Subject
Engineering; Offshore Engineering; Machinery and Machine Elements; Power Electronics, Electrical Machines and Networks; Geotechnical Engineering & Applied Earth Sciences
ISSN
1671-9433
eISSN
1993-5048
D.O.I.
10.1007/s11804-018-0014-8
Publisher site
See Article on Publisher Site

Abstract

Contrary to natural cavitation, ventilated cavitation is controllable and is not harmful. It is particularly used to reduce the drag of the hydraulic vehicles. The ventilated cavitation is characterized by various gas regimes. The mechanisms of ventilated cavitation are investigated in the present work with CFD based on a 2D solver. The attention is especially focused on the transition between the reentrant jet and twin vortex regimes. The results confirm that the product of ventilated cavitation number and Froude number is lower than 1 (σ c Fr < 1) in the twin vortex regime, while it is higher than 1 (σ c Fr > 1) in the reentrant jet regime, as reported in the literature. Further analysis shows that ventilated cavitation is significantly influenced by the natural cavitation number.

Journal

Journal of Marine Science and ApplicationSpringer Journals

Published: Jun 5, 2018

References

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