An Experimental Investigation of Methods of Suppressing the Unsteady Torque Exerted on the Upper Turning Mirror of an Aircraft Mounted Coelostat Turret

Abstract

Various methods of reducing the unsteady torque exerted on the upper turning mirror (UTM) of a coelostat turret were experimentally evaluated. The effect of an aft fairing and the turret aperture on the pressure distribution across the turret was also measured. Areas of flow separation were determined from oil flow patterns. A coelostat model with a turret diameter of five inches and capable of rotating 120 degrees in azimuth was wall mounted in a transonic wind tunnel. Data was collected for Mach numbers of .7, .85, and .95. Passive methods, consisting of external fairings and active methods, consisting of blowing and suction, were employed to reduce UTM torque.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1975
Accession Number
ADA021876

Entities

People

  • Richard M. Mullane

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Air Flow
  • Air Force
  • Aircrafts
  • Boundary Layer
  • Flow Visualization
  • Fluid Flow
  • Geometry
  • High Energy
  • Leading Edges
  • Measurement
  • Pressure Distribution
  • Reynolds Number
  • Static Pressure
  • Turbulent Mixing
  • United States
  • Wind Tunnel Tests
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.
  • Optical Fiber Sensing and Electromagnetic Propagation.
  • ballistics.