Ogive Cylinder Modified for Near Minimum Side Moment.

Abstract

Bodies of revolution develop side moments at large angles of attack due to asymmetric vortices. Consequently, a composite ogive cylinder model was designed in order to determine what modifications were necessary to suppress this moment. Low speed wind tunnel tests, in which the geometry of the model was systematically varied, revealed that a simple afterbody step down coupled with slight nose bluntness could reduce side moment by over 90% compared to the unmodified model. Conventional models were constructed in order to substantiate the results obtained with the composite model. Tests were conducted at three different velocities (85 mph, 120 mph, 140 mph). Large reduction in side moments (90% reductions) were obtained. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1978
Accession Number
ADA061791

Entities

People

  • Peter Daniels

Organizations

  • Naval Surface Warfare Center Dahlgren Division

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Aerodynamic Characteristics
  • Aeronautical Engineering
  • Air Force
  • Air Force Facilities
  • Aircrafts
  • Bodies
  • Composite Materials
  • Department Of Defense
  • Engineering
  • Flow Visualization
  • Geometry
  • Mechanical Engineering
  • Nose Caps
  • Physics Laboratories
  • Weapons
  • Wind Tunnel Tests
  • Wind Tunnels

Readers

  • Aerodynamics/Aeronautics.
  • Structural Dynamics.