Researches On High-firing Rate Weapon Muzzle Flow Field And Simulation Technology

The rate of the high-firing rate weapon can be increased in Gatling, series, or parallelmode. When a high-firing rate weapon launches a projectile, the barrels generate the muzzleflow fields which interfere and superimpose mutually to form a more complex muzzle flowfield. Under the asymmetric influence of the flow field, the lateral pressure distribution of theprojectile changes and performs lateral disturbance on the movement of the projectile, thusaffecting launching accuracy of the weapon system. When the high-firing rate weaponlaunches the APDS, the high initial speed and complex muzzle flow field certainly influencethe shelling process so as to affect the safe separation and launching accuracy of the APDS.This paper analyzes the muzzle flow field of the high-firing rate weapon in differentmodes based on the related theory and simulation technology. Firstly, the paper adopts thecomputational fluid dynamics theory to establish the control equations of the muzzle flowfield in FLUENT simulation analysis. Then, the paper takes a high-firing rate weapon as anexample to simulate its muzzle flow field in three different launching modes to study how themuzzle flow field forms, develops, and decays, and also how the flow field affects the motionstate of the projectile. Secondly, the complex muzzle flow field has an impact on themovement of the projectile when the high-firing rate weapon launches an APDS. Therefore,on the basis of the APDS kinematics and dynamics equations and the shelling principle, thepaper applies the FLUENT software to build the APDS simulation model and analyze thesabot separation process under the unsteady flow conditions with different attack angles. Thenthe aerodynamic and ballistic parameters are applied in the MDADAMS to simulate themotion trajectory of the separated projectile and sabot. The paper explores the grid solver parameter setting, optimization and dynamic mesh (6DOF) application, and programdebugging of the FLUENT software to simulate the sabot separation process when thehigh-firing rate weapon launches the APDS.