2002年
Study on the cavitation mechanism in hydraulic oil flow using a needle projection
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
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- ,
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- 巻
- 216
- 号
- J1
- 開始ページ
- 27
- 終了ページ
- 34
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1243/1350650021543861
- 出版者・発行元
- PROFESSIONAL ENGINEERING PUBLISHING LTD
Cavitation occurring at a sharp projection in a hydraulic oil flow was observed in as much detail as possible, using, variously, a microscope, a high-speed video camera, laser beams, an electric charge detector and a photomultiplier. At the tip of the needle employed as a projection, a tiny cavity as small as several tens of micrometres in length suddenly emerged and would not go away. As cavitation became more vigorous, flashes occurred intermittently around the needle and positive electrical charges were generated which synchronized with the flashing. The electrode inserted downstream from the needle detected negative charge from the oil, which was also synchronous with the flashing. Observing the needle tip with the microscope made it possible to determine exactly the moment of cavitation inception, which turned out to depend on the oil temperature as well as the downstream pressure. All these findings tend to reinforce the 'rip-off' hypothesis previously proposed by the present authors for the cavitation mechanism.
- リンク情報
- ID情報
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- DOI : 10.1243/1350650021543861
- ISSN : 1350-6501
- Web of Science ID : WOS:000174855800004