Experimental study on hydrodynamic behaviors of high-speed gas jets in still water

Acta Mechanica Sinica - Tập 22 - Trang 443-448 - 2006
Zhenqing Dai1, Boyi Wang1, Longxi Qi1, Honghui Shi1,2
1LNM, Institute of Mechanics, Chinese Academy of Sciences, Beijing, China
2College of Mechanical Engineering and Automation, Zhejiang Sci-Tech University, Hangzhou, China

Tóm tắt

The present paper describes experimental investigation on the flow pattern and hydrodynamic effect of underwater gas jets from supersonic and sonic nozzles operated in correct- and imperfect expansion conditions. The flow visualizations show that jetting is the flow regime for the submerged gas injection at a high speed in the parameter range under consideration. The obtained results indicate that high-speed gas jets in still water induce large pressure pulsations upstream of the nozzle exit and the presence of shock-cell structure in the over- and under-expanded jets leads to an increase in the intensity of the jet-induced hydrodynamic pressure.

Tài liệu tham khảo

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