CFD Simulation of the Gas-Operated Weapon Drive Applied to the UK-59 Machine Gun

The flow characteristics of propellant gases inside the gas cylinder weapon gas-operated mechanism, applied to UK-59 machine gun, are studied. Computational Fluid Dynamics (CFD) in ANSYS Fluent is used for simulation through port from barrel bore and back. study's findings presented along with piston law motion thermodynamic quantities cylinder, specifically pressure, temperature, velocity distribution various displacements. experiment was carried out specify pressure as well displacement piston. experimentally obtained values compared results a very good agreement.