Active Control of Asymmetric Vortex Effects.

Abstract

Active control of asymmetric vortex effects on a pointed, slender body at high angles of attack has been achieved by rotating portions of the body about the axis. The lee side asymmetric vortex patterns and their associated yaw-plane forces and moments have been varied in cyclic, repeatable fashion at rates up to 100 cycles per second. The variations occurred to rapidly that the average yaw-plane quantities were brought to small, steady values, or nulled out. The effect was obtained by rotating the nose, the nosetip and a band of the body surface just aft of the nose. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1979
Accession Number
ADA081648

Entities

People

  • John E. Fidler

Organizations

  • Nielsen Engineering & Research (United States)

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Bodies
  • Boundary Layer
  • Cameras
  • Coefficients
  • Flow
  • Flow Visualization
  • Frequency
  • High Angles
  • Hot Wire
  • Hot Wire Anemometers
  • Instrumentation
  • Mach Number
  • Photographs
  • Resonant Frequency
  • Slender Bodies
  • Wind Tunnel Tests
  • Wind Tunnels

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Control Systems Engineering.
  • Fluid Mechanics and Fluid Dynamics.