Study on the Characteristics Parameters of Gas-liquid Two-phase Flow

The main parameters of gas-liquid two-phase flow, such as flow patterns, pressure drop and liquid hold-up, are investigated in this paper. The flow patterns are closely related with pressure drop and liquid hold-up. The characteristics of pressure drop and liquid hold-up in different flow patterns are studied. According to the experiments under given flow rate of liquid, in stratified flow, the liquid hold-up is the highest and the average pressure drop is the lowest, while in annular flow, the result is opposite, in slug flow, the result is intermediate. The effect of liquid hold-up on dynamic feature of pressure signal is studied experimentally and theoretically. The Mean-Square Deviation (MSD) of pressure drop fluctuation signal in stratified flow is small, and it is hardly influenced by the flow rate of liquid and gas and liquid hold-up. The MSD of pressure drop fluctuation signal in slug flow is the biggest and is greatly influenced by the flow rate of liquid and gas and liquid hold-up, the MSD will be increased as hold-up and the flow rate of gas increase. The MSD of pressure drop fluctuation signal in annular flow is between the two patterns mentioned above, and it is little changed with the flow rate of gas, but is greatly influenced by the flow rate of liquid. The MSD will be increased as hold-up and the flow rate of liquid increase.