EXCITATION OF SELF-OSCILLATIONS IN FLOW
PAST A SURFACE WITH A RECESS AND THE
POSSIBILITY OF PREVENTING THEM

R. K. Karavosov and A. G. Prozorov

UDC 532.5; 534.83

The results of experimental investigations of acoustic 
radiation initiated by hydrodynamic perturbations at the inlet to 
a cavity on a surface with a stream flowing past it are analyzed. 
A comparison is made between the processes of formation of large-scale 
hydrodynamic vibrations in a shear flow shed from the leading edge 
of the junction of the recess with the surface past which a stream 
flows and the processes in the region of transition from a laminar 
boundary layer on the surface of a wing to a turbulent one. The advisability 
of division of the flow inhomogeneity in the zone of the junction 
in order to prevent or weaken self-oscillations in the flow is estimated.

Affiliate of the N. E. Zhukovskii Central Aero-Hydrodynamics 
Institute, 17 Radio Str., Moscow 105005, Russia; email: acoustic@mktsagi.ru. 
Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 80, No. 3, pp. 
148-154, May-June, 2007. Original article submitted August 4, 2005.