Dynamics of a cavitating propeller in a water tunnel

Satoshi Watanabe, Christopher E. Brennen

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

This study investigates the unsteady dynamics and inherent instabilities of a cavitating propeller operating in a water tunnel. First, the steady characteristics of the cavilating propeller such as the thrust coefficient are obtained by applying continuity and momentum equations to a simple one-dimensional flow tube model. The effects of the tunnel walls as well as those of the propeller operating conditions (advance ratio and cavitation number) are explored. Then the transfer matrix of the cavitating propeller (considered to be the most appropriate way to describe the dynamics of propeller) is obtained by combining the simple stream tube model with the conventional cavity model using the quasi-static cavitation compliance and mass flow gain factor representation. Finally, the surge instability of a cavitating propeller observed by Duttweiler and Brennen (2001) is examined by coupling the present model of the cavitation with a dynamic model for the water tunnel. This analysis shows that the effect of tunnel walls is to promote the surge instability.

Original languageEnglish
Pages (from-to)283-292
Number of pages10
JournalJournal of Fluids Engineering, Transactions of the ASME
Volume125
Issue number2
DOIs
Publication statusPublished - Mar 1 2003

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering

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