| || Oblique impact of projectile on thin aluminium plates
Author : Khan, W. U.;Gupta, N. K. ;Ansari, R.
Source : Defence Science Journal ; Vol:53(2) ; 2003 ; pp 139-145
Subject : 620.1 Material Science and Technology;623.4 Armaments and Ballistics;531.55 Projectiles
Keywords : Oblique impact;Impact velocity;Projectiles;Ballistic limit;Residual velocity;Plates;Aluminium plates;Analytical model;Projectile velocity
Abstract : "Experiments were performed, wherein cylindrical projectiles made of hardened steel were impacted on commercially available aluminium plates at different angles. Projectiles were of 12.8 mm diameter and plates were of 0.81 mm, 1.52mm and 1.91mm thicknesses. Based on the experimental results, an analytical model has been developed to predict the residual velocity of the projectile and the ballistic limit of the plate. "
| || Computational examination of parameters influencing practicability of Ram accelerator
Author : Bhat, Sunil
Source : Defence Science Journal ; Vol:54(3) ; 2004 ; pp 259-270
Subject : 533.6 Aerodynamics;531.55 Projectiles
Keywords : Ram accelerator;Projectiles;Propulsion;Computational fluid dynamics;Modelling;Flow parameters;Projectile velocity;Flow regime;Fuel-oxidiser mixture;Hit probability;Projectile ablation
Abstract : "The problems concerning practicability aspects of a ram accelerator, such as intense in-bore projectile ablation, large accelerator tube length to achieve high projectile muzzle velocity and high entry velocity of projectile in the accelerator tube for starting the accelerator have been examined. Computational models of the processes like phenomenon of projectile ablation, flow in the aero-window used as accelerator tube-end closure device in case of high drive gas filling pressure in the ram accelerator tube have been presented. New projectile design to minimise the starting velocity of the ram accelerator is discussed. Possibility of deployment of ram accelerator in the defence-oriented role has been investigated to utilise its high velocity potential. "