Visualization of the Large¨Cscale Vortex Structures in Excited Turbulent Jets

Article type: Research Article

Authors: Kopiev, V.F. | Zaitsev, M.Yu. | Inshakov, S.I. | Guriashkin, L.P.

Affiliations: Central Aerohydrodynamic Institute (TsAGI), Moscow, Russia. E-mail: vkopiev@mx.iki.rssi.ru

Abstract: The present work is a part of the more common research aimed at establishing the role of large-scale vortex structures in the mechanism of noise generation by subsonic turbulent jet. The work presents the results of photography and videography of fast non-stationary processes in a circular subsonic jet under lateral acoustic excitation by harmonical source located upstream in a stilling chamber. Jet velocity varied in the range of 40 – 200 m/s (M = 0.12−0.6).

Keywords: Turbulent subsonic jet, Large-scale vortex structures, Shear interferometer, Optical averaging technique

Journal: Journal of Visualization, vol. 6, no. 3, pp. 303-311, 2003