FIELD: physics; measurement.
SUBSTANCE: invention relates to optical diagnostics of fluid flow. Method for diagnosing flow in a vortex chamber, based on particle image velocimetry (PIV), includes creating a swirled flow in the chamber with a swirling parameter S, storing instantaneous velocity fields in the PIV analyser and selecting from these data fields corresponding to one spatial phase of rotation of vortex structures. Phase averaging of the PIV data is carried out taking into account the periodicity of the pressure signal on the inner walls of the chamber: the periodicity of the pressure is related to the evolution of vortices in the chamber.
EFFECT: high signal-to-noise ratio and quality of imaging vortex structures.
4 cl, 3 dwg
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