Capabilities for Magnus Prediction in Subsonic and Transonic Flight

Abstract

The Magnus characteristics of three spin-stabilized projectiles were characterized using steady-state RANS and time-accurate RANS/LES computational fluid dynamic simulations. RANS/LES simulations improved the Magnus moment prediction for projectiles with rounded or chamfered bases. No difference was found between the RANS and RANS/LES simulations for the projectile with a sharp-cornered base?either with or without a boattail. The near-body flow field was similar for RANS and RANS/LES simulations; but the RANS/LES simulations resolved the turbulent eddies in the projectile wake. Magnus moment effects were found to be confined to the rear end of the projectile. The effects of projectile base shape on Magnus were characterized, demonstrating that boattail and hemispherical base configurations have the largest effect on Magnus moment.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 2008
Accession Number
ADA504424

Entities

People

  • J. Despirito
  • S. I. Silton

Organizations

  • United States Army Research Laboratory

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Aerodynamic Characteristics
  • Ammunition
  • Ballistics
  • Boundary Layer
  • Computational Fluid Dynamics
  • Experimental Data
  • Exterior Ballistics
  • Flow
  • Flow Fields
  • Fluid Flow
  • Kinetic Energy
  • Mach Number
  • Mechanical Properties
  • Munitions
  • Projectiles
  • Simulations
  • Steady State

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Computational Fluid Dynamics (CFD)
  • ballistics.