NUMERICAL AND EXPERIMENTAL INVESTIGATION OF THE DEVELOPMENT OF TWO-DIMENSIONAL DISTURBANCES IN THE CASE OF RAYLEIGH–TAYLOR INSTABILITY AND TRANSITION TO TURBULENCE

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Abstract

The results of experimental and numerical investigations of the development of two- dimensional determininistic disturbances in the case of Rayleigh–Taylor instability and transition to turbulence on the gas–liquid interface are presented. The experiments were performed on a light-gas gun. Disturbances at the interface were produced by means of gun oscillations using a special device. The disturbance wavelength varied from 5.4 to 8.8 mm, their amplitude from 0.3 to 0.4 mm, and the liquid layer acceleration from 5.2 to 18.8 mm/ms2. Water was used as a fluid and compressed air as a gas. The experimental data on the disturbance transition to the turbulent stage are obtained. The experiments are accompanied by the numerical modeling using the EGAK code. The criteria of instability transition to the turbulent stage are proposed.

About the authors

E. V Bodrov

Russian Federal Nuclear Center – All-Russian Science and Research Institute of Experimental Physics

Sarov, Russia

D. O Kochetkov

Russian Federal Nuclear Center – All-Russian Science and Research Institute of Experimental Physics

Sarov, Russia

E. V Levkina

Russian Federal Nuclear Center – All-Russian Science and Research Institute of Experimental Physics

Email: EVLevkina@vniief.ru
Sarov, Russia

N. V Nevmerzhitskii

Russian Federal Nuclear Center – All-Russian Science and Research Institute of Experimental Physics

Email: postmaster@ifv.vniief.ru
Sarov, Russia

V. P Statsenko

Russian Federal Nuclear Center – All-Russian Science and Research Institute of Experimental Physics

Sarov, Russia

Yu. V Tretyachenko

Russian Federal Nuclear Center – All-Russian Science and Research Institute of Experimental Physics

Sarov, Russia

I. R Farin

Russian Federal Nuclear Center – All-Russian Science and Research Institute of Experimental Physics

Sarov, Russia

Yu. V Yanilkin

Russian Federal Nuclear Center – All-Russian Science and Research Institute of Experimental Physics

Sarov, Russia

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