Visualization Techniques Applied to 155-mm Projectile Analysis

Report No. ARL-TR-7137
Authors: Richard C Angelini; Sidra I Silton
Date/Pages: November 2014; 30 pages
Abstract: Rolling projectiles using movable lifting surfaces for maneuver control have been and are continuing to be developed by the US Army. The aerodynamic characterization associated with the airframe development is more difficult than that of the traditional symmetrical, ballistic projectile because of the inherent asymmetries of the design as well as of the flow interactions. High fidelity computational simulations of the flow field around the projectile were completed in an attempt to begin to understand the variable nature of the aerodynamics associated with this rolling guided munition, particularly the intermittent dynamic instability suffered by the 155-mm precision munition. Visual analysis of these simulations is a critical component to understanding the complex phenomena demonstrated via these numerical calculations. The ability to understand the physics that impact the flight dynamics of the projectile through interactive manipulation of the computational model and more complex time-dependent analysis provides a more comprehensive understanding of the results. This report describes techniques for visualizing the unique characteristics of this complex guided munition.
Distribution: Approved for public release
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Last Update / Reviewed: November 1, 2014