STUDY OF INTERACTION OF DISTURBANCES
IN AN INTERNAL FLOW

V. G. Zasetskii, R. K. Karavosov,
A. G. Prozorov, and L. I. Sokolinskii

UDC 532.5; 534.83

Data on narrow-band acoustic disturbances that arise in 
manifold pipes with one or two blind branches and in wind tunnels 
with an open working section are analyzed. The ranges of acoustic 
instability that correspond to excitation of self-oscillations in 
a flow in the cases mentioned are determined. The dependence of the 
intensity of acoustic radiation in two blind branches and in the manifold 
between them on the multiplicity of the length of the resonance section 
to the length of halfwaves of resonance frequency is considered. The 
possibility of attenuation of self-oscillations by organizing hydrodynamic 
structures that interact with formations generating acoustic oscillations 
is determined.

Branch of the Central Aerohydrodynamic Institute (TsAGI), 
17 Radio Str., Moscow, Russia; email: acoustic@mktsagi.ru. Translated 
from Inzhenerno-Fizicheskii Zhurnal, Vol. 77, No. 5, pp. 82-87, 
September-October, 2004. Original article submitted January 13, 
2004.