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Journal of Applied Mechanics and Technical Physics

2019 year, number 4

High-Rate Extrustion of Polyethylene in the Acceleration of Projectiles in Ballistic Devices

N. V. Bykov, A. S. Karneichik, A. A. Makarov, M. S. Tovarnov
Bauman Moscow State Technical University, Moscow, 105005, Russia
Keywords: высокоскоростная экструзия, методы ускорения тел, гидродинамический эффект, внутренняя баллистика, баллистические установки, деформация, high-velocity protrusion, body acceleration methods, hydrodynamic effect, internal ballistics, ballistic devices, deformation


Acceleration of projectiles in ballistic devices by means of high-rate extrusion of polyethylene through a conical nozzle is experimentally and theoretically studied. Quasi-one-dimensional gas-dynamic model of a polydisperse mixture of gas and powder particles and a viscoplastic model of a deformed piston are used. The results of numerical simulation of the process under study and the results of a series of shots from a powder ballistic device are given. The influence of the geometry of a conical transition and input velocity of the deformed body on the output velocity of a projectile is experimentally investigated.