Journal ArticleDOI
Time‐Dependent Analysis of Population Inversions in an Expanding Gas
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TLDR
In this article, a time-dependent technique for the numerical solution of convergent-divergent, nonequilibrium nozzle flows has been used to analyze the rapid, vibrational, supersonic expansion of a mixture of CO2, N2, and H2O, wherein the finite rate molecular energy transfer processes can result in a population inversion between the (001) and (100) vibrational energy levels of CO 2.Abstract:
A time‐dependent technique for the numerical solution of convergent‐divergent, nonequilibrium nozzle flows has been used to analyze the rapid, vibrational nonequilibrium, supersonic expansion of a mixture of CO2, N2, and H2O, wherein the finite rate molecular energy transfer processes can result in a population inversion between the (001) and (100) vibrational energy levels of CO2. Results for such population inversions are presented. Among these, a comparison has been made between the present results and the recent results of Basov et al.; this comparison indicates that Basov's calculations overestimate the population inversion in an expanding mixture of CO2 and N2. In addition, results are presented from a series of numerical experiments conducted to assess the validity of several simplified methods for computing population inversions.read more
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Journal ArticleDOI
High-pressure pulsed molecular lasers
TL;DR: A review of recent developments in high-pressure pulsed molecular lasers is presented in this paper, which includes some experimental results on TEA lasers, E-beam lasers, and lasers using Blumlein excitation.
Journal ArticleDOI
Pulsed CO2 Gas‐Dynamic Laser
TL;DR: In this paper, a pulsed combustion-operated CO2 gas-dynamic laser was used to simulate CO2 and N2 expansion in a combustion chamber, where the mixture expands through a supersonic nozzle, thereby causing population inversion in CO2.
Journal ArticleDOI
Modelling of transverse-flow CW CO2 lasers: theory and experiment
E Armandillo,A S Kaye +1 more
TL;DR: In this article, the one-dimensional conservation equations describing the gas transport, coupled with the multi-temperature model rate equations describing molecular kinetics, have been solved numerically in the case of a transverse-flow, transverse discharge carbon dioxide laser.
Journal ArticleDOI
Photon generators and engines for laser power transmission
TL;DR: High power continuous and pulsed coherent radiation generation by gas lasers, discussing transmission by proton generators and transforming engines was discussed in this article, where the authors also discussed transmission by Proton Generators and Transformers.
Proceedings ArticleDOI
Computational fluid dynamics applied to flows in an internal combustion engine
TL;DR: In this article, a detailed finite-rate chemical combustion of a gasoline-air mixture is included, where the working fluid is assumed to be inviscid air of constant specific heats.