Computational Study of the M825 Projectile with Standard and Dome Bases

Abstract

Test firings of a 155mm artillery projectile have shown that its flight performance is affected by small changes in the base cavity configurations. A clear understanding of why these changes affect the flight behavior does not exist. A computational study has been made for the two base cavity configurations flight tested. Flowfield computations have been performed at 0.8 < Mach < 1.5 using a Navier-Stokes base flow code. The aerodynamic drag components have been computed and the total drag determined. Computed results show differences in qualitative features of the recirculatory flow in the base region. The code predicts small differences in drag between the base cavity configurations.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1988
Accession Number
ADA196206

Entities

People

  • Charles J. Nietubicz
  • Jubaraj Sahu
  • Karen R. Heavey

Organizations

  • Ballistic Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aerodynamic Drag
  • Base Flow
  • Base Pressure
  • Classification
  • Coefficients
  • Computational Fluid Dynamics
  • Computations
  • Engineering
  • Equations
  • Flow
  • Flow Fields
  • Fluid Dynamics
  • Fluid Flow
  • Mach Number
  • Projectiles
  • Standards
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • ballistics.