Heat Transfer Measurements Using Infra-Red Thermography in Rarefied Flows

Abstract

Tests have been carried out in the Defence Research Agency Low Density Wind Tunnel to determine the heat transfer rate on a flat plate and a series of sharp slender cones. The tests were carried out in the transitional rarefied flow regime. An infrared scanning camera system was used to determine surface temperatures and hence heat transfer rate. Data were compared with two analytical theories and one existing set of data. Results show that the IR system is at least as good at determining heat transfer rates as a thermocouple technique and has better spatial resolution. The technique is also sensitive enough to detect changes in the state of the flow over the surface of models.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1992
Accession Number
ADA255640

Entities

People

  • M. F. Westby

Tags

Communities of Interest

  • Sensors
  • Weapons Technologies

DTIC Thesaurus Topics

  • Computational Science
  • Detectors
  • Flow
  • Heat Capacity
  • Heat Transfer
  • Instrumentation
  • Leading Edges
  • Low Density
  • Materials
  • Measurement
  • Reynolds Number
  • Shock Waves
  • Specific Heat
  • Surface Temperature
  • Temperature Gradients
  • Test Facilities
  • Wind Tunnels

Readers

  • Aerodynamics/Aeronautics.
  • Computational Fluid Dynamics (CFD)
  • Thermal Physics or Thermal Science.