| Autor: |
Katsuya HIRATA, Tatsuya INOUE, Yoko HANEDA, Noriko MIYASHITA, Hirochika TANIGAWA, Jiro FUNAKI |
| Jazyk: |
angličtina |
| Rok vydání: |
2011 |
| Předmět: |
|
| Zdroj: |
Journal of Fluid Science and Technology, Vol 6, Iss 4, Pp 534-547 (2011) |
| Druh dokumentu: |
article |
| ISSN: |
1880-5558 |
| DOI: |
10.1299/jfst.6.534 |
| Popis: |
In the present study, we investigate a self-excited oscillatory phenomenon of a two-dimensional confined jet with a rectangular-cross-section cylinder as a downstream target. More specifically, in order to reveal the effects of a kinematic parameter the Reynolds number Re and various geometric parameters upon the jet-oscillation frequency fD, we conduct experiments at Re < 5000 in water and in air by an ultrasonic velocity profiler and a hot-wire anemometer, respectively. As a result, we specify the effects of Re and four non-dimensional geometric parameters upon fD, which is non-dimensionalised as the Strouhal number St. As the four geometric parameters, we consider (1) the streamwise target size, (2) the channel breath, (3) the cross-streamwise target size and (4) the target distance in non-dimensional forms with a length scale of the jet's breadth. It is found that the Re effect is negligible. This guarantees a wide-range workability as flowmeters. All the results can be summarised in an empirical formula describing the relation of St with the four geometric parameters. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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