A Finite Element Computation of the Electromagnetic Fields within an Engine Inlet Model.

Abstract

The method of coupled azimuthal potentials (CAP) was applied to a waveguide model of an axially symmetric engine inlet to analyze the fields in the region where the front face of the engine terminates the waveguide. Appropriate boundary conditions were derived and the finite element method was used to solve for the potentials. The Lagrangian of the CAP equations does not provide for the enforcement of Neumann boundary conditions. This prevents exact implementation of the correct boundary conditions for the azimuthal magnetic field. Dirichlet boundary conditions for the azimuthal electric and magnetic fields were enforced for standing wave condition in the inlet model with a conducting flat plate termination. The computed values for the interior field components were compared by evaluating the standard deviation. Three trials were performed with varying finite element mesh densities. It was found that as the mesh density increased, the standard deviation for the computed field components decreased. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1982
Accession Number
ADA124684

Entities

People

  • Thomas Gerard Cooper

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • C4I
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Air Force
  • Computations
  • Differential Equations
  • Electric Fields
  • Electrical Engineering
  • Electromagnetic Fields
  • Engines
  • Equations
  • Finite Element Analysis
  • Geometry
  • Jet Engine Inlets
  • Jet Engines
  • Magnetic Fields
  • Scattering
  • Standards
  • Standing Waves
  • Three Dimensional

Fields of Study

  • Physics

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Plasma Physics / Magnetohydrodynamics