抄録
The performance of an ejector mixing type absorber depends greatly on the performance of the conversion of the thermal energy to the kinematic energy through a convergent-divergent nozzle. The characteristics of convergent-divergent nozzles for flashing expansion of initially subcooled LiBr aqueous solution were experimentally and analytically studied. Flowrates, pressure profiles along nozzles and droplet diameters were measured, and jet-flow pattern the nozzle exit was observed. This paper presents the effect of inlet pressure, inlet temperature, back pressure and divergent angle on pressure undershoot at the throat, critical flowrates and pressure profiles. It was found that flow pattern near the throat is superheated liquid jet core, and flow pattern in divergent nozzle is mist flow. The experimental and analytical results shows that pressure undershoot exists at the throat and slip between liquid and vapor exists in divergent nozzle flow.
