| Autor: |
Shinsuke TAJIRI, Michihisa TSUTAHARA, Kazuhiko OGAWA, Masahiko SAKAMOTO, Masakazu TAJIMA, Keisuke AZUMA |
| Jazyk: |
angličtina |
| Rok vydání: |
2008 |
| Předmět: |
|
| Zdroj: |
Journal of Fluid Science and Technology, Vol 3, Iss 1, Pp 43-55 (2008) |
| Druh dokumentu: |
article |
| ISSN: |
1880-5558 |
| DOI: |
10.1299/jfst.3.43 |
| Popis: |
An experimental study was conducted by performing pressure measurements and flow visualization to investigate unsteady flows inside a two-dimensional semi-open-type nozzle in a ship propulsion equipment directly driven by high-pressure gas. We found that the ejected gas phase and water-flow phase are separated clearly, and the interface between these phases behaves like waves. It was clarified by flow visualization with a high-speed motion camera and a circulating water channel that these interfacial waves change their shapes according to the water-flow velocity. The interfacial wavelength increases as a result of increasing water-flow velocity, and the mechanism that produces thrust on the nozzle wall changes. The thrust and flow patterns for intermittent gas ejection according to water-flow velocity were also clarified. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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