DOI: https://doi.org/10.20535/2521-1943.2018.82.128285

Hydrodynamics in cavitation device under tangential supply fluid

N. І. Horodyskyi, Т. М. Vitenko

Abstract


The design features of the hydrodynamic type cavitation device working section with the input swirling flow are theoretically analyzed. In order to describe such processes was used the flow hydrodynamics modeling performed with the help of numerical methods of the SolidWorks software system and the Flow simulation module. Comparison of results from visual and experimental studies are performed. Visual observations indicate that the life cycle of vapor-gas bubbles and cavities in the design under study can be divided into several periods, in particular the formation of vapor-gas bubbles, their growth, the generation of cavities, volume increase, transformation and destruction. The influence of input and output hydrodynamic and technological parameters of the flow and the design features on the character of the cavitation site and the form of cavitation were studied. According to the results of theoretical and experimental research, rational mode of operation of the cavitation device is proposed. The frequency of oscillations (pulsations) of a cavity is calculated, depending on Reynolds number and Strouhal number. For the dependence Sh = f (Re, P2 / P1), the regression coefficients are calculated, and adequate experimental results with an error of less than 10% are obtained.

Keywords


cavitation; hydrodynamics; bubbles; collapse; fluid pressure; SolidWorks

References


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