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国际流体力学研究期刊
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.9

ISSN 打印: 2152-5102
ISSN 在线: 2152-5110

国际流体力学研究期刊

DOI: 10.1615/InterJFluidMechRes.v31.i5.100
pages 522-528

On Competing Processes that Determine Oscillations Generated by a Localized Cavitation Area

A. N. Zolotko
Department of Physics, I. I. Mechnikov Odessa National University, Ukraine
A. A. Nazarenko
I. I. Mechnikov Odessa National University, Odessa, Ukraine

ABSTRACT

Results of investigations are presented that have shown the presence of two competing processes responsible for generation of acoustic oscillations by an emitting system with an axisymmetric localized cavitation area. It has been shown experimentally that, as the discharge velocity from an annular slot nozzle grows, the average pressure inside the cavitation area decreases monotonously. At the same time, the increase of the velocity causes the pressure growth inside the area. The competition of these two processes leads to an explosive ejection of the content from the area and hence to generation of acoustic oscillations of a relaxation nature. Theoretically calculated results correspond fairly well to those of the experimental research.


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