Analysis on Dynamic Differential Pressures of Multi-Loop Flowmeter for the Measurement of Gas-Liquid Two-Phase Flow

A multi-loop flow sensor with new structure is designed for the parameters measurement of gas-liquid two-phase flow. The dynamical differential pressure signals of gas-liquid two-phase flow captured from the rising section at the horizontal diameter of the multi-loop sensor are analyzed. A characteristic value related to the root-mean-square of the dynamical differential pressure signals is obtained. The relationship between the characteristic value of differential pressures and the volumetric void fraction is established. The gas density is introduced for the correction of this mode. The experiments were carried out on the horizontal multi-phase flow loop. The non-dimensional method was applied to analyze the data. The relationship between the volumetric void fraction and the non-dimensional value are achieved. The online measurement of the volumetric void fraction of gas-liquid two-phase is realized through the multi-loop flow sensor. The experiments showed that the results are satisfactory.