A Numerical Model of Surface Recession Phenomena of Metals Subjected to Laser Radiation in an Aerodynamic Environment

Abstract

A two-dimensional numerical model of the surface recession dynamics and transient heating of metal plates simultaneously subjected to high intensity laser radiation and aerodynamic frictional forces is developed. The model employs heat and force balance calculations over successive finite time increments on an array of finite elements within the plate's cross-sectional profile lying parallel to the wind vector and bisecting the laser beam spot. A computer program of the model in FORTRAN Extended is provided. The model, exercised at various mach numbers, was found to give results consistent with simplified limiting cases of instantaneous melt removal. Melt-through times for 0.05, 0.10, and 0.20 centimeter thick sheets of aluminum, magnesium, stainless steel, and titanium absorbing 1 and 10 kilowatts of power over spots of 1 sq cm and 10 sq cm at mach numbers ranging from 0.0 to 4.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1972
Accession Number
AD0769338

Entities

People

  • Richard G. Wigglesworth

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Boiling Point
  • Boundary Layer
  • Computer Programs
  • Energy Transfer
  • Enthalpy
  • Heat Energy
  • Heat Of Fusion
  • Heat Of Vaporization
  • Heat Transfer
  • Lasers
  • Latent Heat
  • Specific Heat
  • Surface Properties
  • Thermodynamic Properties
  • Thermodynamics
  • Three Dimensional

Fields of Study

  • Engineering
  • Physics

Readers

  • Fluid Dynamics.
  • Optical Physics and Photonics.
  • Surface Engineering/Surface Coating Technology.

Technology Areas

  • Directed Energy
  • Directed Energy - Lasers