Abstract
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.
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Dai, Z., Wang, B., Qi, L. et al. Experimental study on hydrodynamic behaviors of high-speed gas jets in still water. Acta Mech Mech Sinica 22, 443–448 (2006). https://doi.org/10.1007/s10409-006-0029-2
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DOI: https://doi.org/10.1007/s10409-006-0029-2