Wind Tunnel Measurements of the Magnus Induced Surface Pressures on a Spinning Artillery Projectile Model in the Transonic Speed Regime

Abstract

The aerodynamic surface pressures on a spinning projectile were experimentally obtained during transonic wind tunnel tests employing a novel model design and instrumentation arrangement. A series of remotely controlled pressure taps located in the non-spinning inner portion of the wind tunnel model detected the surface pressures through vent holes in the spinning outer portion. Data were obtained at spin rates of 0 and 82 Hz for angles of attack of 0, 4, and 10 deg. Testing was conducted at a Mach number of 0.94 and Reynolds number of 4 million per foot. The results illustrate the large circumferential pressure variation over the boattail region as well as the nonlinear effect of the angle of attack. The integrated pressure data indicate not only the total Magnus force and moment coefficients for the model, but also the individual contributions of the various body components. Keywords: Magnus effect; Surface pressures; Wind tunnel test techniques.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1986
Accession Number
ADA175909

Entities

People

  • John W. Molnar
  • Miles C. Miller

Organizations

  • Edgewood Chemical Biological Center

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Boundary Layer
  • Computational Fluid Dynamics
  • Flow Fields
  • Fluid Dynamics
  • Instrumentation
  • Mach Number
  • Magnus Effect
  • Measurement
  • Plastic Explosives
  • Pressure Distribution
  • Pressure Measurement
  • Projectiles
  • Rotating Bands
  • Test Methods
  • Wind Tunnel Models
  • Wind Tunnel Tests
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Aerodynamics/Aeronautics.