Abstract:

In this paper, numerical simulations were carried out to study the optimal size of gas-liquid two-phase ejector using Fluent simulation software, and the influence of injecting pressure and outlet pressure to ejector conditions. The results showed that the jet nozzle diameter in ejector was affected and restricted by the factors such as flow field development, pressure characteristic curve and phase volume concentration, the nozzle diameter was in the range of 16 mm~20 mm considering these four factors; When the injection pressure was constant, gas flow rate, gas concentration and velocity decreased with the increase of the outlet pressure; When the outlet pressure was constant, jet gas phase concentration was on the rise with the increase of injection pressure. This will have a certain guiding significance to the design of gas-liquid ejector, and improve water jet structure, and perfect the hydraulic cutting seam technology.

Key words: CFD simulation, hydraulic slotting, gas-liquid two-phase jet, injector 1 引言