Computational Fluid Dynamics Results for a 25-mm Projectile

Report No. ARL-MR-676
Authors: Karen Heavey; Jubaraj Sahu
Date/Pages: September 2007; 24 pages
Abstract: Computational fluid dynamics approaches were used to compute the flow fields of a 25-mm projectile, modeled with and without a jet cavity. Steady-state numerical results have been obtained for a series of cases at Mach number 0.756, at 0¿ angle of attack, with jet pressures of 3, 6, and 12 atm. Full three-dimensional computations were performed using a two-equation realizable k-¿ turbulence model. Force and moment data have been extracted from the solutions for comparison and show that increasing jet pressure increases the effect on normal force and pitching moment while having little effect on drag.
Distribution: Approved for public release
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Last Update / Reviewed: September 1, 2007