Oscillation flow induced by underwater supersonic gas jets
| Autor: | Xiaogang Wang, Bo-Yi Wang, Honghui Shi, Ruoling Dong, Lite Zhang, Qiang Guo, Chao Wang, Huixia Jia |
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| Rok vydání: | 2010 |
| Předmět: |
Physics
Jet (fluid) business.industry Oscillation Astrophysics::High Energy Astrophysical Phenomena Mechanical Engineering Flow (psychology) Nozzle General Physics and Astronomy Mechanics Plume law.invention Physics::Fluid Dynamics symbols.namesake Optics Pressure measurement Mach number law symbols High Energy Physics::Experiment Supersonic speed business |
| Zdroj: | Shock Waves. 20:347-352 |
| ISSN: | 1432-2153 0938-1287 |
| DOI: | 10.1007/s00193-010-0270-2 |
| Popis: | This paper describes an experimental study on the oscillation flow characteristics of submerged supersonic gas jets issued from Laval nozzles. The flow pattern during the jet development and the jet expansion feedback phenomenon are studied using a high-speed camera and a pressure measurement system. The experimental results indicate that along the downstream distance, the jet has three flow regimes: (1) momentum jet; (2) buoyant jet; (3) plume. In the region near the nozzle exit a so-called bulge phenomenon is found. Bulging of the jet occurs many times before the more violent jet expansion feedback occurs. During the feedback process, the jet diameter can become several times that of the original one depending on the jet Mach number. The frequencies of the jet bulging and the jet expansion feedback are measured. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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