CAPABILITIES OF THE HILBERT METHOD IN STUDYING SUBMERGED JETS FLOWING FROM LONG CHANNELS OF COMPLEX GEOMETRY
Y. N. Dubnishchev, O. S. Zolotukhina, V. V. Lukashov, V. V. Lemanov, K. A. Sharov
Kutateladze Institute of Thermophysics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: multi-angle Hilbert visualization method, laminar-turbulent transition, triangular nozzle, vortex structures
Abstract
A study of the complex spatial flow of a freon jet flowing out of a long triangular cross-section channel in the laminar-turbulent transition mode was conducted. In order to obtain a detailed picture of the flow, a multi-angle measuring complex of Gilbert diagnostics was implemented based on the IAB-463M device. It was shown that the channel geometry has a weak effect on the laminar-turbulent transition scenario in the channel, with the formation of turbulent spots. It was found that when a turbulent spot hits a jet flowing out of a triangular cross-section channel, it causes turbulization and generates secondary disturbances in the mixing layer. The results may be of practical importance in CVD combustion and deposition processes.
|
