FIELD: measurement of non-stationary (time-varying) pressure in gas and liquid flows.
SUBSTANCE: invention relates to measurement of non-stationary (time-varying) pressure in gas and liquid flows. The invention is intended to determine the unsteady pressure in a gas or liquid stream in the presence of particles in it. A method for determining the unsteady pressure of a gas flow using a pressure receiver in which there is a cavity and a receiving hole connecting the cavity to the outer space is based on the readings of a pressure sensor installed in the cavity. The damping coefficient and the natural frequency of gas vibrations in the intake opening of the nozzle, without taking into account damping (resonant frequency), are determined by the method for free damped oscillations or by the method of steady harmonic oscillations.
EFFECT: expansion of the operating frequency range of the nozzle, including the resonant frequency of the resonator, due to the possibility of reducing the size of the internal cavity, increasing the accuracy of determining the unsteady pressure in the flow according to the readings of the sensor installed in the internal cavity of the nozzle, and increasing the survivability of the sensor during experimental studies.
2 cl, 6 dwg
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