METHOD FOR COMPLEX EXPRESS DIAGNOSTICS OF PERIODIC NONSTATIONARY VORTEX FLOW AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2018 - IPC G01P5/26 

FIELD: measuring equipment.

SUBSTANCE: invention relates to instrumentation equipment and allows to study gas-liquid vortex flows with any ratio of liquid and gas. Method, based on combination of LDA and PIV, comprises passing laser radiation through a measuring volume, measuring with obtaining a full period of pulsations, determining, based on received information, the time interval between series of images according to which instantaneous PIV of the velocity field are calculated, illumination of the experimental vortex flow by coherent laser light, recording images by two CCD cameras receiving reflected light and recording information in a predetermined time interval. In the diagnostics of the vortex flow induced by the rotating precessing core (PRC), the velocity signals and reference signals are simultaneously generated by using piezoceramic hydrophones or by using precision condenser microphones located in the device for implementing the method directly inside the test container behind the swirler along the flow in the form of separate conjugated pairs, diametrically located in the horizontal and vertical planes.

EFFECT: technical result is expended technical capabilities and reduction of errors associated with a sharp change in liquid and gas ratio of in the vortex flow.

9 cl, 6 dwg