Abstract
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.
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