Structure of the Turbulent Flow in an Axisymmetric Submerged Gas-Saturated Jet
M. A. Pakhomov, V. I. Terekhov
Kutateladze Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia
Keywords: затопленная пузырьковая струя, структура турбулентного течения, модель переноса рейнольдсовых напряжений, submerged bubbly jet, turbulent flow structure, transport model for Reynolds stresses
Abstract
The structure of a vertically ascending submerged circular bubbly jet is numerically simulated by using the Eulerian approach. The influence of the concentration and diameter of air bubbles on the averaged parameters and fluctuating characteristics of the submerged turbulent two-phase jet is analyzed. An increase in the concentration and size of gas bubbles leads to jet expansion (by 35% as compared to the one-phase jet), which testifies to intensification of turbulent mixing with the ambient space. Addition of air bubbles enhances the flow turbulence (by 20% as compared to the one-phase jet).
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