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Experiments on the scaling of tip vortex cavitation inception for elliptical hydrofoils


Mori, T and Takahashi, K and Khoo, M and Venning, J, Experiments on the scaling of tip vortex cavitation inception for elliptical hydrofoils, Proceedings of the 2020 Annual Spring Meeting of the Japan Society of Naval Architects and Ocean Engineers, 25-26 May 2020, Tokyo, Japan, pp. 355-359. (2020) [Refereed Conference Paper]

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Cavitation has been a major concern to naval engineers as it induces hydrodynamic noise and vibration of marine propellers in both naval and civilian ships. On typical marine propellers, cavitation begins in tip vortices that trail from the tip of the blades. However, model-scale evaluation of full-scale tip vortex cavitation inception is very difficult due to its strong dependency on nuclei population.

Reynolds number dependence of tip vortex cavitation inception has been studied by many authors. McCormick reported that cavitation inception number, σi, varied with a power of Reynolds number, Ren. Although McCormick reported the index n to be 0.35, different values of n were proposed by other researchers.

In the present study, Reynolds number dependence of the tip vortex cavitation inception was investigated for elliptical hydrofoils using cavitation tunnels in Japan and Australia. Inception and dynamics of the cavitating flows were observed using a high speed camera. Nuclei distributions were measured by a Cavitation Susceptibility Meter (CSM).

Item Details

Item Type:Refereed Conference Paper
Keywords:tip vortex cavitation, cavitation inception, multi-phase flow, vortex
Research Division:Engineering
Research Group:Maritime engineering
Research Field:Marine engineering
Objective Division:Defence
Objective Group:Defence
Objective Field:Maritime
UTAS Author:Khoo, M (Mr Matthew Khoo)
UTAS Author:Venning, J (Dr James Venning)
ID Code:139823
Year Published:2020
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2020-07-07
Last Modified:2020-11-12

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