翼型のクラウドキャビテーションの発生機構とその制御
書誌事項
- タイトル別名
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- Mechanism of Cloud Cavitation and Its Control
- ヨクガタ ノ クラウド キャビテーション ノ ハッセイ キコウ ト ソノ セイ
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説明
This paper describes the experimental result of cloud cavitation on a two-dimensional foil. Cloud cavitation was observed by a high speed camera and a high speed video camera to know the mechanism of cloud cavitation. Ink was injected to investigate the reserve flow (re-entrant jet) at the bottom of the sheet cavity. The flow around the sheet cavity was measured by a laser doppler velocimeter. By applying conditional sampling technique on the flow measurement, unsteady flow field was examined with the motion of cloud cavitation.<BR>A small square bar was attached on the foil surface and the effect on the cloud cavitation was investigated.<BR>The conclusion are as follows : <BR>(1) The shedding of cloud cavitation is caused by re-entrant jet. <BR>(2) The re-entrant jet starts at the rear center of a sheet cavity and spreads to the leading edge.The re-entrant jet disturbs the sheet cavity and the sheet cavity collapses into a mass of bubbly cavities. When the re-entrant jet reaches the cavity leading edge, the shedding of cloud cavity occurs.<BR>(3) A bar attached on the foil surface reduces the re-entrant flow, resulting in the reduction of cloud cavitation shedding. A ditch on the foil surface gives the similar effect on the cloud cavitation.
収録刊行物
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- 日本造船学会論文集
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日本造船学会論文集 1995 (178), 41-50, 1995
社団法人 日本船舶海洋工学会
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詳細情報 詳細情報について
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- CRID
- 1390282679072437632
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- NII論文ID
- 110003861998
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- NII書誌ID
- AN00194094
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- ISSN
- 18842070
- 05148499
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- NDL書誌ID
- 3925668
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- データソース種別
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- JaLC
- NDL
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- NDL-Digital
- CiNii Articles
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