Numerical Simulation On The Process Of Explosive Dispersal Of Liquid Fuel With High Longitudinal Initial Velocities

The liquid fuel cloud formed by the explosive dispersal is very important for the function of Fuel Air Explosive with Two Events(TEFAE). The more detail about the inside cloud we learned, the more detail about the process of cloud forming we can obtain. Thus study on the liquid fuel cloud formed by the explosive dispersal is very important for TEFAE. The inside cloud detail parameters can hardily be obtained by the experimental methods, while numerical method can. The process on the explosive dispersal of liquid fuel with high initial velocity was divided into two parts: near-field region dominated by explosive force and far-field region dominated by gas-dynamic force. For the near-field region, due to the process of near-field take place in very short time, the deformation caused by the initial longitude velocity was neglected and then 2D gas-liquid motion model and liquid breakup model were established. The near-field provided for the far-field initial parameters. For the far-field region, the process was regarded as the interaction of big droplets, small droplets and gas phase. Because the diameter of the droplets is small, the droplets phase were regarded as the continue phase and each droplets with the same diameter have the same thermal-dynamic parameters. In such process, for the droplets, the breaking-up, vaporizing, aggregation were concerned. Based on such models, 2D two -phase models were presented. The result on the process for the FAE filled 5kg PO indicates that such models can simulate the process on explosive dispersal fuel with high initial velocity. The results also shows the shape of the cloud is different from that formed in quiet state.