METHOD FOR MEASURING VOLUMETRIC FLOW WITH JET TRANSDUCER Russian patent published in 2023 - IPC G01F1/22 

FIELD: measuring technology.

SUBSTANCE: invention can be used in heat and power, gas, aviation and other industries. The method of measuring volumetric flow with a jet converter (JC) is that the gas passing through the pipeline is passed through a constriction device (CD) and the JC connected to the CD in parallel, consisting of a jet amplifier closed by feedback, the output frequency signal of the JC is recorded and the volumetric flow is determined consumption according to the formula: Q = Q_CD +Q_JC = Q_CDmax *[1-[1-0.5*(f/f_max)²/(1-P_2CR/P₁)]²]^0.5 +A _JC*f, where f is the frequency of the JC output signal; f_max - frequency of the JC output signal at P₂ = P₁/2; P₁ - absolute pressure at the inlet to the JC; P₂ - absolute pressure at the outlet of the JC; Q_CD - volumetric flow rate of gas passing through the CD; Q_JC - volumetric flow rate of gas passing through the JC; Q_CDmax - maximum (critical) volumetric flow rate of gas passing through the CD, at an absolute pressure at the inlet equal to P₁; P_2CR - absolute pressure at the outlet of the control system at which the critical outflow from the control system is achieved (at the current P₁). A_JC is a proportionality coefficient that depends on the geometric parameters of the JC.

EFFECT: expansion of the range of flow measurement, with large pressure drops across the control system.

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