Accession Number : ADP006609

Title :   Numerical Simulation of Sabot Discard Aerodynamics using Computational Fluid Dynamics,

Corporate Author : ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s) : Nusca, Michael J.

Report Date : MAR 1992

Pagination or Media Count : 12

Abstract : Computational fluid dynamics (CFD) solutions of the three-dimensional Navier-Stokes equations have been applied to sabot discard aerodynamics for gun-launched, saboted, armor-piercing projectiles, The portion of the launch cycle which involves strong aerodynamic interference between the projectile and discarding sabot (carrier) components has been investigated. Three sabot components were located symmetrically at various positions near the projectile and at angle of attack. The complex system of shock/boundary-layer interactions between multiple bodies (projectile and sabots), during the discard sequence, has been numerically simulated. Computed and measured surface pressures compare favorably for Mach number 4.5 and Reynolds number six million per meter. Comparison of symmetric sabot discard trajectories predicted using CFD and the AVCO sabot design code are shown.

Descriptors :   *ARMOR PIERCING AMMUNITION, *MATHEMATICAL MODELS, *SABOT PROJECTILES, ABSTRACTS, AERODYNAMICS, ANGLE OF ATTACK, ANGLES, ARMOR, ATTACK, BOUNDARIES, BOUNDARY LAYER, COMPARISON, CYCLES, EQUATIONS, FLUIDS, GUN LAUNCHED, GUNS, INTERACTIONS, INTERFERENCE, LAYERS, MACH NUMBER, NAVIER STOKES EQUATIONS, NUMBERS, PROJECTILES, REYNOLDS NUMBER, SABOTS, SEQUENCES, SHOCK, SURFACES, THREE DIMENSIONAL, TRAJECTORIES, COMPUTATIONS, FLUID DYNAMICS.

Subject Categories : Fluid Mechanics
      Ammunition and Explosives
      Operations Research

Distribution Statement : APPROVED FOR PUBLIC RELEASE