The Noise Characteristics of Gas-liquid Two Phase Slug Flow in Vertical Pipe

The flow noise is produced due to fluid structure interaction and gas-liquid interaction, Flow noise signal contains a lot of information of the two-phase flow, such as flow type, phase holdup, velocity and so on, The detection and analysis of flow noise are mostly in the study of gas-solid two-phase flow, It has not been reported in gas-liquid two-phase flow research, In this paper, acoustic emission measurement technique combined with fast Fourier transform (FFT) is used to detect the acoustic signal of the gas liquid two phase flow, a new designed porous plate is installed in the vertical flow pipeline, A large number of experiments were carried out in the multiphase flow experimental facility at Hebei University. The approximate relationship between the peak frequency distribution of noise signal and the gas flow rate is obtained by measuring the peak position of the different gas flow rates under the slug flow condition. A preliminary method for estimating gas flow is proposed, which provides a new idea for the analysis of gas-liquid two-phase flow noise signal extraction of characteristic parameters of two-phase flow.