DECREASE IN THE NOISE OF A SUBSONIC TURBULENT JET EJECTED 
FROM A RING NOZZLE WITH LONGITUDINAL SLOTS

E. V. Vlasov, A. S. Ginevskii, R. K. Karavosov,
T. M. Makarenko, and A. G. Nalivaiko

UDC 532.525.2:534.2

The results of investigations of the aerodynamic and acoustic 
characteristics of a jet ejected from a ring nozzle with longitudinal 
slots are presented. It is shown that these slots markedly influence 
the jet mixing and substantially decrease the jet noise generated 
in a wide frequency range.

Branch of the Central Aerohydrodynamics Institute, 17 
Radio Str., Moscow, 105005; email: ginevsky@orc.ru. Translated from 
Inzhenerno-Fizicheskii Zhurnal, Vol. 79, No. 3, pp. 82-84, May-June, 
2006. Original article submitted May 15, 2005.