Closure mechanisms of ventilated supercavities under steady and unsteady flows

Ashish Karn, Rohan De, Jiarong Hong, Roger E.A. Arndt

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

The present work reports some interesting experimental results for ventilated supercavitation in steady and unsteady flows. First, a variety of closure modes obtained as a result of systematic variation in Froude number and air entrainment, are reported. The closure mechanisms were found to differ from the standard criterion reported in the literature. Further, the occurrence of a variety of stable and unstable closure mechanisms were discovered that have not been reported in the literature. Next, a hypothesis is presented to explain the cause behind these different closure mechanisms. The proposed hypothesis is then validated by synchronized high-speed imaging and pressure measurements inside and outside of the supercavity. These measurements show that the supercavity closure is a function of instantaneous cavitation number under unsteady flow conditions. (Research sponsored by Office of Naval Research, USA).

Original languageEnglish (US)
Article number012145
JournalJournal of Physics: Conference Series
Volume656
Issue number1
DOIs
StatePublished - Dec 3 2015
Event9th International Symposium on Cavitation, CAV 2015 - Lausanne, Switzerland
Duration: Dec 6 2015Dec 10 2015

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unsteady flow
steady flow
closures
supercavitating flow
Froude number
entrainment
pressure measurement
cavitation flow
high speed
occurrences
causes
air

Cite this

Closure mechanisms of ventilated supercavities under steady and unsteady flows. / Karn, Ashish; De, Rohan; Hong, Jiarong; Arndt, Roger E.A.

In: Journal of Physics: Conference Series, Vol. 656, No. 1, 012145, 03.12.2015.

Research output: Contribution to journalConference article

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