Abrupt Cavity Separations on Cavitating Hydrofoils

Yukio Ito; Risaburou Oba; Hitoshi Soyama; Tsutomu Narasaka; Ryoichiro Oshima

doi:10.1299/kikaib.54.1555

Abrupt Cavity Separations on Cavitating Hydrofoils

Yukio Ito, Risaburou Oba, Hitoshi Soyama, Tsutomu Narasaka, Ryoichiro Oshima

ENG - Finemechanics

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

To improve the physical understanding of the fatal “violent vibration” in the near-transition range, the “abrupt cavity separations” associated with the vibration were precisely observed in a water flow around two-dimensional hydrofoils, for various angles of incidence and cavitation numbers, by means of high-speed photography. The cavity separation is a periodic phenomenon that the subcavitating cavity and the supercavitating cavity form alternatively between several spanwise locations, accompanied with a bubble cloud shedding from the subcavitation cavity. The cavity separation line becomes highly distorted immediately after the shedding.

Original language	English
Pages (from-to)	1555-1559
Number of pages	5
Journal	Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume	54
Issue number	503
DOIs	https://doi.org/10.1299/kikaib.54.1555
Publication status	Published - 1988

Keywords

Abrupt Cavity Separation
Attached Cavitation
Bubble Cloud
Cavitation
Hydrofoil
Transition Region
Violent Vibration

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10.1299/kikaib.54.1555

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title = "Abrupt Cavity Separations on Cavitating Hydrofoils",

abstract = "To improve the physical understanding of the fatal “violent vibration” in the near-transition range, the “abrupt cavity separations” associated with the vibration were precisely observed in a water flow around two-dimensional hydrofoils, for various angles of incidence and cavitation numbers, by means of high-speed photography. The cavity separation is a periodic phenomenon that the subcavitating cavity and the supercavitating cavity form alternatively between several spanwise locations, accompanied with a bubble cloud shedding from the subcavitation cavity. The cavity separation line becomes highly distorted immediately after the shedding.",

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TY - JOUR

T1 - Abrupt Cavity Separations on Cavitating Hydrofoils

AU - Ito, Yukio

AU - Oba, Risaburou

AU - Soyama, Hitoshi

AU - Narasaka, Tsutomu

AU - Oshima, Ryoichiro

PY - 1988

Y1 - 1988

N2 - To improve the physical understanding of the fatal “violent vibration” in the near-transition range, the “abrupt cavity separations” associated with the vibration were precisely observed in a water flow around two-dimensional hydrofoils, for various angles of incidence and cavitation numbers, by means of high-speed photography. The cavity separation is a periodic phenomenon that the subcavitating cavity and the supercavitating cavity form alternatively between several spanwise locations, accompanied with a bubble cloud shedding from the subcavitation cavity. The cavity separation line becomes highly distorted immediately after the shedding.

AB - To improve the physical understanding of the fatal “violent vibration” in the near-transition range, the “abrupt cavity separations” associated with the vibration were precisely observed in a water flow around two-dimensional hydrofoils, for various angles of incidence and cavitation numbers, by means of high-speed photography. The cavity separation is a periodic phenomenon that the subcavitating cavity and the supercavitating cavity form alternatively between several spanwise locations, accompanied with a bubble cloud shedding from the subcavitation cavity. The cavity separation line becomes highly distorted immediately after the shedding.

KW - Abrupt Cavity Separation

KW - Attached Cavitation

KW - Bubble Cloud

KW - Cavitation

KW - Hydrofoil

KW - Transition Region

KW - Violent Vibration

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Abrupt Cavity Separations on Cavitating Hydrofoils

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