Abstract
In order to clarify the mechanism of the severe erosion mainly resulting from the singular vortex cavitation, we carefully observe the vortex cavitation associated with the erosion around a butterfly valve by means of a high-speed video camera, whose framing rate is 40500 per second. The velocity of cavitating flow is measured by the digital-image processing technique. It is worth noting that the vortex cavitation develops in the boundary region between the main flow region, i. e., the orifice-jet, and the recirculating region. The cavitating vortex core consists of several tiny vortex cavitations. The rotating velocity of the highly erosive vortex cavitation can also be determined by this technique.
Original language | English |
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Pages (from-to) | 1133-1138 |
Number of pages | 6 |
Journal | Transactions of the Japan Society of Mechanical Engineers Series B |
Volume | 60 |
Issue number | 572 |
DOIs | |
Publication status | Published - 1994 |
Externally published | Yes |
Keywords
- Bubble
- Cavitation
- Digital Image Processing
- Erosion
- Flow Measurements
- Un-steady Flow
- Valve
- Vortex
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanical Engineering