A Finite Element Approach for Multidimensional Inverse Heat Conduction

Abstract

An efficient technique for mapping thermal boundary conditions is described and demonstrated. The technique is based on a piece-wise polynomial approximation where the Laplacian derivatives in space are constrained using the heat equation. Measured values for the Laplacian are obtained from temperature rate measurements from sensors embedded within a body. The technique has been implemented in a digital signal processor and is able to provide real-time data on thermal boundary conditions over a surface. The technique is adaptable to complex geometry. In this paper the technique will be applied to a study of the injector-wall interactions in a laboratory scale liquid rocket engine.

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Document Details

Document Type
Technical Report
Publication Date
May 26, 2011
Accession Number
ADA546652

Entities

People

  • Edgar Felix
  • Edward Coy
  • Matthew Bergkoetter
  • Stephen Danczyk

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies
  • Sensors
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aeronautics
  • Air Force
  • Air Force Research Laboratories
  • Astronautics
  • Boundaries
  • Engines
  • Equations
  • Frequency
  • Geometry
  • Heat Flux
  • Injectors
  • Measurement
  • Mechanical Engineering
  • Polynomials
  • Rocket Engines
  • Rockets
  • Turbines

Readers

  • Computer Vision.
  • Fluid Dynamics.
  • Image Processing and Computer Vision.

Technology Areas

  • Space
  • Space - Hall-Effect Thruster