THERMAL ANEMOMETRY METHOD FOR GAS FLOW AND THERMAL ANEMOMETER ON ITS BASIS Russian patent published in 2023 - IPC G01P5/12 

FIELD: measuring equipment.

SUBSTANCE: invention relates to measuring thermal and hydrodynamic parameters of a gas flow and is intended for use in studies of a wide range of gas flows, including two-phase dispersed flows. The method is based on the phenomenon of delay in the temperature responses of bodies with different thermal inertias under a stepwise thermal effect on them. During measurements, the temperatures of two bodies are recorded in the heating mode and in the subsequent cooling mode, according to the obtained temperature data, the time point is found, which corresponds to the maximum difference in the normalized overheating of the bodies at the same time points. Based on the measured time, the heat transfer coefficient and the gas flow rate are found, while using the calculated ratio and the previously obtained calibration dependence. The hot-wire anemometer implementing the method contains two bodies of the same given shape and size, two identical fast-response thermal converters, two identical electric heaters, a body holder, a stabilized power source, a control and signal processing unit, the bodies being placed in the holder and having significantly different thermal inertia.

EFFECT: increased accuracy of measurements, expanded range and dynamic ranges of the measured parameters and a simultaneously increased range of measured flows.

2 cl, 4 dwg