The Measurement of the DC-7 Trailing Vortex System Using the Tower Fly- by Technique

Abstract

The report describes the technique and presents the results of a series of full-scale flight tests performed at NAFEC in September 1971, in which the wing trailing vortices of the Douglas DC-7 airplane were investigated by flying the airplane at low altitude, upwind of, and in close proximity to a 140- foot instrumented tower. Tower instrumentation consisted of hot-film anemometers located at 4-foot intervals and wind velocity and direction sensors. Vortex air flow visualization was by use of colored smoke. The data consists of tangential velocity distribution plots, peak recorded velocity as a function of time, airplane configuration and wind; vortex vertical and lateral transport velocities, and specimen time histories of the velocities recorded at individual sensors. (Modified author abstract)

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1973
Accession Number
AD0771214

Entities

People

  • David Lawrence
  • Leo J. Garodz
  • Nelson J. Miller

Tags

Communities of Interest

  • Sensors
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Flow
  • Aircrafts
  • Atmospheric Motion
  • Boundary Layer
  • Cameras
  • Computer Programs
  • Computers
  • Data Processing
  • Flow Visualization
  • Measurement
  • Metal Matrix Composites
  • Plastic Explosives
  • Recording Systems
  • Short Takeoff Aircraft
  • Three Dimensional
  • Turbulence
  • Wind Velocity

Readers

  • Aerodynamics.
  • Aerospace Test and Evaluation
  • Fluid Dynamics.