Flow and phase volume fraction measurement of bubble flow

We use a new type of internal and external tube differential pressure flowmeter to study the gas-liquid two-phase flow measurement characteristics of the vertical riser. Firstly, according to the continuous equation and the Bernoulli equation, the two-phase flow formula is derived, and then the correction coefficient is introduced. Under the condition of the known inlet parameters, the differential pressure signal and the liquid Froude number, the gas Froude number, and the Luo are analyzed. The relationship between the horse parameter and the correction coefficient is obtained, and the fitting relationship of each parameter is obtained. Then, by analyzing the pressure loss ratio and the variation law of the Lomman parameters, the mathematical model of pressure loss ratio, liquid Froude number and Loma parameters is established, and then the phase hold ratio is obtained. The method of calculating the Froude number of the liquid phase by differential pressure is used as the basis to calculate the two-parameter measurement of phase fraction and flow rate, which provides a new method for the separation measurement of gas-liquid two-phase flow.