Liquid-Gas Two-Phase Flow Simulation for Flat Fan Nozzles

This paper focuses on the numerical simulation of two-phase flow near the outlet of flat fan nozzles under low operating pressure. The moment-of-fluid (MOF) method is used for the representation of the liquid gas interface and the directional split method is used for the advection of the interface. A variable density pressure projection algorithm is used for the fluid solver and a block structured adaptive mesh refinement (AMR) method is used to locally increase the resolution near interface. The internal geometry of the nozzle is defined by three parameters: nozzle inlet diameter D, V-cut or U-cut width W and V-cut or U-cut offset H. The effects of these three parameters on the fan exit angle and pressure loss through the nozzles are studied. Experiments are conducted to validate our simulation results. Finally, we give some conclusions about the modeling of the flat fan nozzle under low operating pressure based on our study.