Investigation of Viscous Line Vortices With and Without the Injection of Core Turbulence

Abstract

An experimental research program was conducted to investigate the general characteristics of a line vortex trailed from a three-dimensional lifting surface, and to determine how its general velocity distribution, turbulence level, turbulent frequency content, and dissipation rates are affected by the injection of a jet of turbulent air and by a fixed turbulence generator. Three component hot-wire surveys indicated that injection of the vortex core reduced the peak tangential velocity, established a strong axial flow component, increased the core diameter, altered the turbulence spectrum, and enhanced the turbulence level in the viscous core.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1974
Accession Number
AD0785256

Entities

People

  • Andrew D. Zalay
  • John C. Balcerak
  • Richard P. Jr. White

Tags

Communities of Interest

  • Air Platforms
  • Materials and Manufacturing Processes
  • Sensors
  • Space

DTIC Thesaurus Topics

  • Acoustic Signatures
  • Aircraft Industry
  • Aircrafts
  • Airfoils
  • Airframes
  • Boundary Layer
  • Computer Programs
  • Coordinate Systems
  • Fixed Wing Aircraft
  • Flow Visualization
  • Fluid Mechanics
  • Helicopter Rotors
  • Measurement
  • Military Research
  • Rotary Wing Aircraft
  • Wind Tunnel Tests
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Computational Fluid Dynamics (CFD)
  • Fluid Dynamics.