Analysis of Inner Flow Patterns in Gas-Liquid Ejectors

The flow pattern in the choke of the horizontally installed gas-liquid ejector was studied. According to flow pattern criterion equations in horizontally installed pipes, and combining with the performance equation of gas-liquid ejectors, the transition intervals of annular flow and mist flow in the ejector were obtained. Further, the critical equation of annular flow in air-water ejector was discussed amply, and the relationship between the maximum local Mach number at the outlet of the nozzle and the inlet/outlet pressure ratio of the second fluid was obtained. A conclusion was deduced that the inner flow pattern in air-water ejectors was annular at least, when the gas （air） expanded supercritically in the nozzle.