Numerical analysis of interior ballistics through eulerian-lagrangian approach

• DOI: 10.1007/s12206-013-0619-4
• Publication Date: 2013-09-17T21:02:55Z
• Authors: Jin-Sung Jang; Hyung-Gun Sung; Tae-Seong Roh; Dong-Whan Choi
• Keywords: 0103 physical sciences; 01 natural sciences

A numerical code for interior ballistics using the Eulerian-Lagrangian approach was developed to analyze polydisperse systems. The internal flows in a gun barrel and the compressibility effects were calculated using the semi-implicit method for pressure-linked equations algorithm. Ghost cell extrapolation was used for the moving boundary with projectile movement. The numerical scheme and moving boundary method were verified through the free piston motion problem. The developed code, including the combustion of the propellant, was compared with simulations of 40 mm gun firings. The results of numerical analysis agree with the simulation results, confirming the reliability of the developed code. Comparative studies were conducted with the results of the interior Ballistics of high-velocity guns code (version 2) according to porosity and propellant size. The numerical analysis of the combustion and movement of individual propellants provides deeper insight into the mechanism of gun firing and the significant factors that influence muzzle velocity.