Numerical Simulation Of The Process Of Multiphase Fuel Dispersion And The Distribution Of Transient Cloud Field

The solid-liquid mixed fuel explodes to form fuel air cloud. The detonation strengthdepends much on the cloud state. The cloud distribution is the base of the design of clouddetonation devices. In this study, the dispersal process of solid-liquid mixed fuel isinvestigated by ANSYS-FULENT to explore the numerical simulation method ofsolid-liquid mixed fuel.The fuel dispersion process of2kg cloud detonation device was simulated byconsidering the effects of the evaporation of liquid fuel and the presence of aluminumpowder particles, and the cloud dispersion range and the dispersion speed of the cloud edgeagree quite well with experimental results. Additionally, the fuel concentration andturbulence intensity on the horizontal line through and0.5m above the center of the clouddetonation device were monitored. It results that the concentrations on the line0.5m abovethe center of the cloud detonation device are lower than that on the line through the centerof the cloud detonation device, and that the cloud peak concentration and peak turbulenceintensity decrease with the increase of the distance from the center of the cloud detonationdevice.We changed the amplitude and the action time of the drive load pressure from the firstexplosion, the solid-liquid ratio and the liquid fuel components to study the change law ofthe cloud dispersion range and the cloud edge speed and analyze the cloud concentrationand the turbulence intensity. It shows that the higher the amplitude of the drive loadpressure is, the larger the cloud dispersion range gets when the action time of the drive loadpressure is fixed; the action time of the drive load pressure has little effects on the clouddispersion range when the amplitude of the drive load pressure is fixed; the solid-liquidratio also has little effects on the cloud dispersion range; while the change of the liquid fuelcomponents can affects the cloud dispersion range clearly.The development trend of fuel-air-explosion is increasing charge, so7kg,13kg and100kg cloud detonation device were chosen in this study to simulate the dispersion process.The results show that the cloud dispersion range get larger with the increase of charge mass, and the peak turbulence intensity can be expressed by the distance from the center of thecloud detonation device in the fitting curve y=a+b*c^x.It is shown that the numerical model established in this study can simulate thedispersion process of the solid-liquid mixed fuel preferably; which opens a new way ofresearch for the optimal design of FAE devices.