METHOD AND DEVICE FOR DETERMINING THE PRESSURE OF DISSOLVED GASES IN LIQUID Russian patent published in 2018 - IPC G01N7/14 

FIELD: measuring equipment.

SUBSTANCE: invention relates to the field of measurement technology and can be used to determine physical-chemical properties of liquids. Method is proposed for determining the pressure of dissolved gases in a liquid by measuring the gas pressure in a stationary cavitation bubble. Stationary cavitation bubble occurs in liquid with a dissolved gas in an expanding flow region as the cylindrical body moves along a wall with a small gap. Experiments showed that a stationary cavitation bubble occurs at some angular distance along the circumference of the cylinder behind the line of the minimum gap between the cylinder and the moving wall and is adjacent to the surface of the cylinder. To measure the pressure in the cavitation bubble, there is a hole in the cylinder with a diameter of 0.5 mm, through which the pressure in the stationary cavitation bubble is determined. In this case, hole in the cylinder must be displaced beyond the minimum clearance line. Experiments showed that the pressure in the cavitation bubble does not depend on the size of the gap and characterizes the pressure of dissolved gases in the liquid.

EFFECT: technical result is higher accuracy of obtained data.

10 cl, 3 dwg