Accession Number:

AD0784862

Title:

Analysis of Turbulent Shear Flows in Laser Nozzles and Cavities

Descriptive Note:

Interim rept. Feb-May 1974

Corporate Author:

AERONAUTICAL RESEARCH ASSOCIATES OF PRINCETON INC NJ

Report Date:

1974-05-01

Pagination or Media Count:

28.0

Abstract:

An invariant second-order closure program for compressible shear flows has been developed at ARAP. The program has been applied to study a simulation of the mixing region in a HF chemical laser. Considerable insight into the complex processes occurring in laser cavities has been achieved by these studies. The results show that the assumptions used in the eddy viscosity and the turbulent kinetic energy closure methods are not completely valid for nonequilibrium flows such as in the chemical laser system. The results of studies of other shear flows with the same invariant second-order model are in generally good agreement with experimental measurements, but suggest the need for improvement of the pressure diffusion model for high speed compressible flows.

Subject Categories:

  • Lasers and Masers
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE