Analysis on salvo muzzle flow field of twin-barreled automatic mortar
In order to analyze the influence of muzzle flow field on the projectile during salvo firing of double-barreled automatic mortar,the average pressure in the bore and projectile velocity of mortar firing were calculated using classical interior ballistic model.The three-dimensional unsteady Euler equation and structured dynamic grid method based on dynamic layering technology were used to deal with the mesh changes caused by projectile motion.The flow field model was established to numerically simulate and analyze the changes of the muzzle flow field during the firing of this twin-barreled rapid-fire mortar.The study shows that after the projectile exits the muzzle,the gunpowder gas expands rapidly,and the two flow fields superimpose on each other to disturb the local high-pressure area,and the superimposed flow fields cause the lateral combined force of the projectile,the maximum lateral force reaches 350.6 N,which will affect the firing accuracy of the twin-barreled automatic mortar when it is fired simultaneously.
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