Accession Number : ADA115944

Title :   Research on the Flow Phenomena Related to High Power Laser.

Descriptive Note : Final technical rept. 1 Nov 78-31 Dec 81,


Personal Author(s) : Christiansen,W H ; Russell,D A ; Hertzberg,A

PDF Url : ADA115944

Report Date : 31 Mar 1982

Pagination or Media Count : 25

Abstract : The fundamental mechanisms of the interaction of electrical discharges of the glow type and the fluid mechanics normally found in electric discharge lasers have been studied in an effort to improve their performance capability. Basic information on these devices was obtained via small-scale experiments at the University of Washington. An alternative method of phase compensation for laser beams using the refractive properties of gas jets was also investigated. The amount of beam degradation produced by turbulent shear layers in the jets was studied also. The experimental investigation of this beam degradation mechanism constitutes much of the effort in the project. Theoretical calculations detailing the effects of mixing of dissimilar gases at low Mach number have been carried out. High-power laser mixing flows have been studied by numerical, analytical, and experimental techniques. The models for wave decay in supersonic cavity flows have been extended, optical sensitivities calculated, and experiments conducted using a laser interferometer. Calculated thermodynamic parameter history through decaying wave systems has been used with simple HF reaction models to study strongly-coupled reaction shocks. A systematic study of the sensitivity of HF laser performance to fluid process assumptions has been carried out, with emphasis on power extraction measurements from a versatile shock/Ludwieg tube laboratory laser. (Author)

Descriptors :   *Lasers, *High power, *Research management, Electric discharges, Interactions, Hydrogen, Performance(Engineering), Refractive index, Laser beams, Shear properties, Turbulent boundary layer, Theory, Computations, Models, Fluorides

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE