Dependence of supercavity closure upon flow unsteadiness

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

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

The present work reports some interesting experimental results for ventilated supercavitation in an unsteady flow. Our experiments have shown that incoming flow unsteadiness does not only affect supercavity shape but also leads to a change in supercavity closure, irrespective of the presence of a body inside the supercavity. Synchronized high-speed imaging and pressure measurements have ascertained the dependence of supercavity closure on instantaneous cavitation number under unsteady flow conditions. Further, control-volume analysis at the closure shows the intricate relation among the cavitation number, pressure difference occurring at the supercavity closure and the obtained closure mechanisms.

Original languageEnglish (US)
Pages (from-to)493-498
Number of pages6
JournalExperimental Thermal and Fluid Science
Volume68
DOIs
StatePublished - Nov 1 2015

Bibliographical note

Funding Information:
The authors gratefully acknowledge support by the Office of Naval Research (Program manager, Dr. Ronald Joslin) under Grant # N000140910141 . We also acknowledge the contribution of Mr. Ellison Kawakami for the closure images shown in Fig. 3 .

Publisher Copyright:
© 2015 Elsevier Inc.

Keywords

  • Supercavitation
  • Supercavity closure
  • Unsteady supercavitation
  • Ventilation

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