Accession Number:

ADA010493

Title:

Effect of a Turbulent Shear Flow on a Laser Beam.

Descriptive Note:

Interim rept.,

Corporate Author:

UNITED AIRCRAFT RESEARCH LABS EAST HARTFORD CONN

Personal Author(s):

Report Date:

1975-03-01

Pagination or Media Count:

88.0

Abstract:

This is the second part of an overall program to investigate aerodynamic window flows and their effect on laser beam quality. The present effort has concentrated on the effects produced by interaction of the beam with the turbulent shear layers present in the aerowindow stream. These shear layers are the free mixing layers at the jet inner and outer boundaries and, in MECA multi-element centrifugal aerowindow configurations, the mixing layers between adjacent nozzle element flows. Evidence that the turbulence-induced degradation might be of significance evolved in the initial part of this study. The present investigation, therefore, is being applied to development of new analytical modeling approaches appropriate to shear layer turbulence, adaptation of existing atmosphere-oriented treatments where possible, and acquisiton of experimental data which characterize laser degradation through small-scale, wind-tunnel type turbulence and to provide an understanding of the physical phenomena.

Subject Categories:

  • Atmospheric Physics
  • Lasers and Masers
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE