The Effect of Boattail Shape on Magnus,

Abstract

The effects of projectile boattail geometry on the Magnus force and moment were investigated through wind tunnel tests of a 5.2 caliber non-finned projectile. Boattail length varied from 0 to 1.7 calibers and boattail angle varied from 0 to 18 deg with Mach numbers ranging between 0.5 and 2.5. A Reynolds number of 4 million per foot was chosen to ensure fully developed turbulent flow ahead of the boattail. The Magnus force and moment coefficient derivatives are shown to correlate well with a non-dimensional variable derived from the Howarth-Mangler transformation. An empirical methodology for calculating the Magnus force and moment coefficient derivatives is developed and shown to compare favorably with the Magnus data of other shells. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1976
Accession Number
ADA035273

Entities

People

  • Frank G. Moore
  • Gil Y. Graff

Organizations

  • Naval Surface Warfare Center Dahlgren Division

Tags

DTIC Thesaurus Topics

  • Aerodynamic Characteristics
  • Air Force
  • Artillery
  • Boundary Layer
  • Engineering
  • Experimental Data
  • Exterior Ballistics
  • Flow
  • Geometry
  • Laminar Boundary Layer
  • Layers
  • Mach Number
  • Munitions
  • Projectiles
  • Weapons
  • Wind Tunnel Tests
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Atmospheric Science/Meteorology
  • Fluid Dynamics.