THE DEPENDENCE OF FLOW COEFFICIENT ON THE OPENING DIAMETER OF WATCH JEWELS AS DIFFERENTIAL PRESSURE DEVICES OF GAS DYNAMIC MICRO FLOWMETERS

Abstract

In the work, based on the processing and analysis of the experimentally determined values of the flow rate coefficient α of watch jewels with different opening diameters d, an analytical relationship between the coefficient α and the value of the watch jewels diameter d was obtained.

The obtained dependence provides a simplification of the procedure for determining the flow rate coefficient α of watch jewels as differential pressure devices of gas dynamic flow meters and allows to calculate the value of its coefficient α with high accuracy based on the known value of the specific watch jewel opening  diameter d.

The deviation of the calculated value of the flow coefficient α from the experimentally determined value does not exceed 0,45 %.