Investigation of Boundary Layer Disturbances Caused by Periodic Heating of a Thin Ribbon

Abstract

Wind tunnel experiments were conducted to investigate the use of a periodically heated Nichrome ribbon as a boundary layer control device. The specific items of interest were: 1) the physical parameters governing the ribbon behavior, 2) the consequence of the ribbon on the downstream development of the laminar boundary layer; and 3) the controllability of the ribbon to produce the desired consequence. The disturbances detected in the boundary layer immediately downstream of the vibrating ribbon exhibited the same frequency characteristics as the ribbon. The evolution of these disturbances in the boundary layer was studied by positioning a hot wire anemometer, boundary layer probe at different locations behind the ribbon. The selective amplification and damping of the disturbance frequencies agreed with the predictions of linear Tollmien- Schlichting stability theory.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1988
Accession Number
ADA190572

Entities

People

  • Brenda Haven

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Sensors
  • Space

DTIC Thesaurus Topics

  • Boundary Layer
  • Boundary Layer Control
  • Climate Change
  • Computational Fluid Dynamics
  • Engineering
  • Fluid Dynamics
  • Heat Transfer
  • Heat Transfer Coefficients
  • Laminar Boundary Layer
  • Layers
  • Measurement
  • Pressure Gradients
  • Resonant Frequency
  • Tunnels
  • Turbulent Flow
  • Wind Tunnel Tests
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Aerial Delivery - Logistics and Supply Chain Management.
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Fluid Dynamics.