AERODYNAMIC EXCITATION OF SAME-TYPE NARROW-BAND PULSATIONS 
IN VARIOUS TECHNICAL DEVICES

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

UDC 533.697:534.832

Model experiments reproduce the character of flow 
pulsation processes developing in starting sections of gas compressor 
stations with an open return valve. Based on the analysis and comparisons 
it is assumed that, in the flow section of the valve, large-scale 
vortex structures are formed, and coupled narrow-band hydrodynamic 
and acoustic oscillations, similar to those observed in close-jet 
wind tunnels having an open working section and with a wing profile 
in flow, are generated. The generality of the excitation mechanism 
for intense disturbances in a gas flow with various heterogeneities 
is substantiated by the closeness of the relations for the dimensionless 
parameters, characterizing it to a common dependence.

JEPTER74920199917
JEPTER7492017