Measurement of Transient Heat Flux and Surface Temperature Using Embedded Temperature Sensors (Preprint)

Abstract

Approximate solutions have been obtained for surface temperature and heat flux for the case of two embedded temperature sensors. The solutions have been verified and the range of validity has been established using several methods including comparisons with an exact analytical solution for a linear problem and a numerical calculation for a non-linear problem. The performance of the model is presented in both the frequency domain and the time domain. A propagation of error analysis is presented and is used to establish the optimum spacing between the sensors. The solutions place no restrictions on the boundary or initial conditions and rely only on current values of temperature and its rate of change. The temperature dependence of transport properties is accounted for in an approximate way. The method requires minimal computation and is suitable for implementation in a real-time sensor.

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Document Details

Document Type
Technical Report
Publication Date
Jul 21, 2008
Accession Number
ADA484383

Entities

People

  • Edward Coy

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Sensors
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force Research Laboratories
  • Boundaries
  • Coefficients
  • Combustion Chambers
  • Equations
  • Errors
  • Frequency
  • Frequency Domain
  • Heat Flux
  • Heat Sinks
  • Heat Transfer
  • Materials
  • Measurement
  • Surface Temperature
  • Thermal Conductivity
  • Time Domain
  • Transport Properties

Readers

  • Distributed Systems and Data Platform Development
  • Fluid Dynamics.
  • Thermal Physics or Thermal Science.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster