Acoustic Analysis of Aircraft Vortex Characteristics

Abstract

A program of field measurements at NAFEC and related analysis has been carried out as part of the development of acoustic radar for aircraft vortex turbulence detection. Spectra of acoustic signals scattered from the vortices were found to agree in form with those derived from a model, and yielded velocities that generally agreed with those observed by the NAFEC tower instrumentation. Consistent quantitative measurements of circulation, the quantity most closely related to hazard, were obtained for a number of different aircraft. Confident vortex tracks were obtained for aircraft (a DC-6) altitudes up to 1500 ft, with the vortex detected at about 1300 ft and tracked for about a minute until it passed out of the coverage region.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1972
Accession Number
AD0749845

Entities

People

  • Arthur E. Nagy
  • C. Mcnary
  • Martin Balser

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Accuracy
  • Acoustic Equipment
  • Acoustic Scattering
  • Aircrafts
  • Boundary Layer
  • Data Analysis
  • Data Processing
  • Detection
  • Detectors
  • Doppler Effect
  • Measurement
  • Radar
  • Sodar
  • Stratified Fluids
  • Test And Evaluation
  • Time Intervals
  • Wind Velocity

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Aerospace Test and Evaluation
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.