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Advanced Coupled CFD/RBD Calculations of Free-Flight Projectile Aerodynamics

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1 Author(s)
Sahu, J. ; US Army Research Laboratory (ARL), Aberdeen Proving Ground, MD

This paper describes a new multidisciplinary computational study undertaken to model the flight trajectories and the free flight aerodynamics of both finned and spinning projectile configurations. Actual flight trajectories are computed using an advanced coupled computational fluid dynamics (CFD)/rigid body dynamics (RBD) technique. An advanced time-accurate Navier-Stokes computational technique has been used in CFD to compute the unsteady aerodynamics associated with the free flight of the finned projectile at supersonic speeds and the spinning projectile at subsonic speeds. Computed positions and orientations of the projectile have been compared with actual data measured from free flight tests and are found to be generally in good agreement. Predicted aerodynamics forces and moments also compare well with the forces and moments used in the six degree freedom fits of the results of the same tests.

Published in:

Users Group Conference, 2005

Date of Conference:

2005

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