In the present study, the authors investigate an oscillatory phenomenon of a two-dimensional confined jet with a square prism, by experiments and computations. In experiments in an air duct, jet’s frequencies were measured near the target by a hot-wire anemometer, in the Reynolds-number range of 300–5000. In computations, the numerical method adopted here is a finite difference method formulated in terms of vorticity and stream function. As a result, we can see the Reynolds-number effect, the target-distance effect and the target-size effect upon Strouhal number. Regarding the Reynolds-number effect, it was found that there is less influence, which guarantees widerange workability as a flowmeter or a mixer. Regarding geometrical parameters, the results show information for optimal configurations. The results can be surnmarised in an empirical formula describing the relation between Strouhal number and geometrical parameters, with a specified unstable range. Computed jet’s frequencies were confirrned to be in good agreement with experimental ones, which indicates that the phenomenon is intrinsically two-dimensional. Numerical results reveal details of flow field and possibility for applications.
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ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference
July 6–10, 2003
Honolulu, Hawaii, USA
Conference Sponsors:
- Fluids Engineering Division
ISBN:
0-7918-3697-5
PROCEEDINGS PAPER
On Oscillation of a Confined Jet With a Downstream Obstacle Available to Purchase
Katsuya Hirata,
Katsuya Hirata
Doshisha University, Kyoto, Japan
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Jiro Funaki,
Jiro Funaki
Doshisha University, Kyoto, Japan
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Katsuya Yamada,
Katsuya Yamada
Doshisha University, Kyoto, Japan
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Hirohisa Wakisaka
Hirohisa Wakisaka
Doshisha University, Kyoto, Japan
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Katsuya Hirata
Doshisha University, Kyoto, Japan
Jiro Funaki
Doshisha University, Kyoto, Japan
Katsuya Yamada
Doshisha University, Kyoto, Japan
Hirohisa Wakisaka
Doshisha University, Kyoto, Japan
Paper No:
FEDSM2003-45131, pp. 937-942; 6 pages
Published Online:
February 4, 2009
Citation
Hirata, K, Funaki, J, Yamada, K, & Wakisaka, H. "On Oscillation of a Confined Jet With a Downstream Obstacle." Proceedings of the ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference. Volume 2: Symposia, Parts A, B, and C. Honolulu, Hawaii, USA. July 6–10, 2003. pp. 937-942. ASME. https://doi.org/10.1115/FEDSM2003-45131
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