| || Numerical Simulation on Dispersal Character of Fuel by Central HE
Author : Qi, Zhang;Kezhen, Wei;Aimin, Luo;Denggui, Wang;Bin, Qin
Source : Defence Science Journal ; Vol:57(4) ; 2007 ; pp 425-433
Subject : 623.5 Armaments and Ballistics;620.261 Explosives
Keywords : Fuel-air explosive;Explosion;Numeral compute;Dispersal velocity;FAE
Abstract : A fuel-air explosive (FAE) device consists of a shell (top-end cover, bottom-end cover, shellside wall), a mixed fuel, a central pipe and a burst high-explosive (HE) charged in the central pipe. The mixed fuel is filled in a column structure and dispersed by the explosion drive of central burst HE in the central pipe. The dispersed fuel mixes with air, which produces combustible cloud which can be detonated. That is the fuel-air explosive (FAE). The height and ignition position of the central HE charged column affect the fuel dispersal process. The initial stage of fuel dispersal was simulated by numerical computation. The simulation result indicated that the distribution of fuel dispersal velocity, when the central HE is ignited at the end, is not the same as that when the central HE is ignited on the axis of the central HE simultaneously. When the ratio of the column height of the central HE and that of the FAE device is 0.64~0.73, the distribution of fuel dispersal velocity has little difference when the central HE is ignited at the end of column. But, when the ratio of the column height of the central HE and that of the FAE device is 0.89, the fuel axial dispersal velocity is obviously more than that when the ratio of the column height of the central HE and that of the FAE device is 0.64~0.73.