Bubbly structures in a cavitating slot orifice
| Autor: | Iztok Žun, Erazem Polutnik, Matjaž Perpar, Marko Pečar |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Fluid Flow and Transfer Processes
Materials science Atmospheric pressure business.industry Mechanical Engineering General Chemical Engineering Flow (psychology) Aerospace Engineering Bubble cloud Mechanics Water pressure Physics::Fluid Dynamics Bubble cavitation Optics Nuclear Energy and Engineering Cavitation business Hot film Body orifice |
| Zdroj: | Experimental Thermal and Fluid Science. 53:57-69 |
| ISSN: | 0894-1777 |
| DOI: | 10.1016/j.expthermflusci.2013.11.003 |
| Popis: | The research refers to the experimental study of cavitation phenomena when water was passing through the slot orifice. The contribution brought up by this article is the detailed time and space dependent analysis of bubbly structures identified using high speed video, microresistivity probes, optical fibre pressure probe, and hot film probe. Two principle experiments were carried out to study cavitation in a confined geometry. The first one was designed to study an induced single bubble cavitation when the water pressure was reduced below the atmospheric pressure, but was still high enough so that there was not any saturated pressure in the slot region. The second experiment was undertaken at a reference pressure which was sufficient to produce a massive cavitation in the slot region. The following flow regimes were identified and analyzed in detail: the so-called detachment regime where bubble breakup was observed in the case of the individual bubble cavitation; and in the case of the large scale cavitation, the regime of macroscopic bubbles clustering into bubble cloud and the regime of collapsing bubbles. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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