Engineering Mechanics

Proceedings Vol. 10 (2004)

ENGINEERING MECHANICS 2004

Copyright © 2004 Institute of Thermomechanics, Academy of Sciences of the Czech Republic, Prague

 

Trávníček Z., Hrubý J., Vogel J.
pages 297 - +10p., full text

This study deals with the limiting geometry of confined coaxial jets when the outer diameter of the annular jet is identical with that of the confining round duct. The study is a step in the development of a new method of investigation of aerosol formation out of gaseous precursors. The visualization was made in air, the numerical simulation used software FLUENT. The study focused on laminar flows, and on the stability loss of the inner round jet. A series of flow patterns is presented and the result is comparable with a classification known from available literature. Certain differences in scenarios of the patterns were observed such as three-dimensional structures and helical modes. To portrayal these structures, a stereoscopic technique was employed. The passing frequency was evaluated stroboscopically.

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