CHANGE OF THE SIGN OF THE EFFECT WITH INCREASE IN THE INTENSITY 
OF HIGH-FREQUENCY ACOUSTIC EXCITATION OF A TURBULENT JET
E. V. Vlasov, A. S. Ginevskii,
R. K. Karavosov, and T. M. Makarenko

UDC 532.525.2:534.2

Results of an experimental investigation of high-frequency 
acoustic excitation of turbulent jets for different intensities of 
the acoustic field are presented. It is shown that upon reaching a 
certain limiting level of excitation at high frequencies, the sign 
of the effect changes, i.e., at this level, high-frequency excitation 
leads to generation of turbulence in the jet rather than its suppression. 
Hence it follows that the high-frequency acoustic effect that suppresses 
turbulence is most efficient within an optimum range of frequencies 
and at an optimum level of excitation.

State Scientific-Research Center "N. E. Zhukovskii Central 
Aerohydrodynamic Institute (TsAGI)," Moscow, Russia. Translated from 
Inzhenerno-Fizicheskii Zhurnal, Vol. 74, No. 1, pp. 8-9, January
-February, 2001. Original article submitted June 23, 2000.

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