AUTOMATED MEASURING COMPLEX FOR DETERMINING THE HYDROGASDYNAMIC CHARACTERISTICS OF SWIRLING FLOWS IN DEVICES WITH NARROW ANNULAR CHANNELS OF VARIABLE CROSS-SECTION Russian patent published in 2022 - IPC G01P5/08 G01L9/06 

FIELD: measuring technology.

SUBSTANCE: invention relates to measuring technology and can be used to study the hydrogasdynamic characteristics of swirling flows and convert the obtained parameters into calculated values of velocity fields, pressure fields, temperature fields in devices with narrow annular channels of variable cross-section. The claimed complex contains a computer, a data input module into the computer, a control unit, a coordinate mechanism and a gas flow velocity measurement sensor. As a sensor for measuring the gas flow velocity, a Pitot-Prandtl tube is used, the pressure lines of which are connected to two absolute pressure sensors, and a device consisting of a linear drive with a stepper motor and a rotary platform with a servo drive is used as a coordinate mechanism, providing step-by-step linear movement in the transverse direction of the channel and step-by-step rotation around the axis of linear movement of the velocity sensor in the channel of the device under study, and controlled by the control unit to determine the flow velocity vectors in the navigation area of the velocity sensor by searching for the direction of the maximum velocity pressure at each point of linear movement by scanning the dynamic pressure in the inlet in the entire range of rotation angles of the Pitot-Prandtl tube elbow, as well as the flow temperature sensor located at the end of the Pitot-Prandtl tube, and an atmospheric pressure sensor for additional monitoring and comparison of static pressure inside the device under study with atmospheric pressure in order to identify rarefaction and overpressure zones.

EFFECT: creation of an automated measuring complex for the purpose of more complete and accurate spatial measurement in an automated mode of absolute static pressure, coordinate components and the vector of full velocity, as well as the temperature of the swirling gas flow in narrow annular channels of variable cross-section.

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