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Atmospheric and Oceanic Optics

2019 year, number 4

Investigations of the acoustic field produced by a supersonic jet

D.A. Marakasov1, V.M. Sazanovich1, R.Sh. Tsvyk1, A.N. Shesternin1, D.A. Gubanov2
1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634055, Russia
2Khristianovich Institute of Theoretical and Applied Mechanics of Siberian Branch of Russian Academy of Sciences, 4/1, Institutskaya str., Novosibirsk, 630090, Russia
Keywords: сверхзвуковая струя, акустическое поле, волновой фронт, частотный спектр, микрофоны, дискретные частоты, акустический шум, supersonic jet, acoustic field, wave front, frequency spectrum, microphones, discrete frequencies, acoustic noise


The article presents the results of experimental studies of the acoustic field generated by a supersonic jet at the installation of the VJU ITPM SB RAS. The measurements were made with 9 microphones placed symmetrically with respect to the jet axis. The shape of the phase front of the sound wave, the spectra of broadband acoustic noise and discrete components with high temporal and spatial resolution are analyzed. It is shown that the structure of turbulence in the acoustic field is inhomogeneous and is formed by several sources.