METHOD OF MEASUREMENT OF SUPERSONIC FLOW PULSATIONS AND DEVICE FOR ITS IMPLEMENTATION (OPTIONS) Russian patent published in 2017 - IPC G01L9/12 G01P5/14 

FIELD: measuring equipment.

SUBSTANCE: method includes measuring the pulsations of the supersonic flow by the receivers of pressure pulsations. Their sensing elements make flush with the surface of the device installed in the diagnosed supersonic flow, the output of the received signals from the sensor to the recording equipment with analogue-to-digital conversion with recording and mathematical processing in the computer system. The method is implemented by the device and its options. According to the invention, the device is installed in the diagnosed supersonic flow so that the surface of the device with pressure pulsation sensors are under different angles of inclination relative to the direction of the incoming flow, the instant readings of all the pressure pulsation sensors are recorded analogue-to-digital conversion of the readings is done. The mathematical processing is done using the method of separation of mode-decomposition of the resultant field of pulsations of the supersonic flow using the conversion factors of disturbances of the shockwave and separated swirling, entropy and acoustic modes of the supersonic flow pulsations are obtained. One of the options of the device for measuring the supersonic flow pulsation includes pressure pulsation sensors, which make flush with the surfaces of the device mounted on the holder in the diagnosed supersonic flow. According to the invention the device is made of four plates with sharp front edges, installed on the cross-shaped holder at different angles of inclination to the flow with the arms in a horizontal and vertical plane at distances, excluding the interaction of shock waves generated in each plate flowover, with the pressure pulsation sensors being placed on each plate of the device.

EFFECT: improvement of accuracy of measurement of gasdynamic parameters, reliability and information content of the methods of research of the flow structure.

4 cl, 6 dwg