Effects of Oscillation Frequency and Amplitude on Separation in an Unsteady Turbulent Flow.

Abstract

A two-dimensional model was developed and used in a preliminary investigation of the relationship between flow oscillation frequency, oscillation amplitude, and turbulent boundary layer separation in a low speed, oscillating wind tunnel. It was found that the frequency of oscillation had a profound effect upon the amplitude of oscillation and flow separation. Frequencies from 20 Hz to 28 Hz and 70 Hz to 80 Hz allowed attachment of the boundary layer, while other frequencies, up to 100 Hz, caused flow separation in an eighteen degree divergent section. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1980
Accession Number
ADA096386

Entities

People

  • Martin Fox

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Boundary Layer
  • Flow
  • Flow Separation
  • Frequency
  • Hot Wire
  • Instrumentation
  • Layers
  • Measurement
  • Plastic Explosives
  • Pressure Distribution
  • Short Takeoff Aircraft
  • Static Pressure
  • Test Facilities
  • Turbulent Boundary Layer
  • Turbulent Flow
  • Two Dimensional
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Plasma Physics / Magnetohydrodynamics