Aerodynamic Curtains Design for Gas Flow Laser Cavities

  • S. Kaizerman
  • Y. Nachshon
  • E. Wacholder
Conference paper
Part of the Springer Proceedings in Physics book series (SPPHY, volume 15)

Abstract

A significantly improved flow-field can be achieved by designing supersonic aerodynamic jet curtain devices in the laser cavity. In the analysis of these devices special attention has been devoted to reduce the disturbances in the cavity flow-field and to preserve the optical beam quality. A judiciously “tailored” version of the generalized-mesh Eulerian APACHE code has been used for this purpose. This version includes all the important physical models for accurate prediction of the system transients, but it possesses also greater problem geometry flexibility and is simpler to use and reasonably economic for extensive parametric and sensitivity studies. Computations of the combined laser cavity/curtain flow-field of various geometrical configurations have been successfully applied to the study of aerodynamic curtains for several kinds of gas flow lasers. Typical examples of computed results for an HF chemical laser arc presented and discussed. General conclusions of practical importance are drawn.

Keywords

Convection Helium 

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References

  1. [1]
    Boraas, S., “Investigation of Jet Curtains for Chemical Laser Application”, AIAA Journal, 16, 3, pp. 251–258, 1978.CrossRefADSGoogle Scholar
  2. [2]
    Ramshaw, J.D. and Dukowicz, J.K., “APACHE: A Generalized-Mesh Eulerian Computer Code for Multi-component Chemically Reactive Fluid Flow”, Los Alamos Scientific Laboratory, Report LA-7427, January 1979.Google Scholar
  3. [3]
    Rapagnani, N.L. and Lankford, D.W., “Time-Dependent Nozzle and Base Flow/Cavity Model of CW Chemical Laser Flow-Fields”, AIAA Paper, 81–1135, Palo Alto, Ca., June 23 - 25, 1981.Google Scholar
  4. [4]
    Rapaqnani, N.L. and Lankford, D.W., “Modeling of Cavity Flows With Large Base Relief”, Gas-Flow and Chemical Lasers, 2nd Symposium, 1978, J.W. Wendt, editor, Hemisphere Publishing Corp., 1979Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1987

Authors and Affiliations

  • S. Kaizerman
    • 1
  • Y. Nachshon
    • 1
  • E. Wacholder
    • 1
  1. 1.Scientific DepartmentMinistry of DefenceHaifaIsrael

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