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Proceedings Paper

Modelling Of Gas Flow And Heating In Excitation Channel Of Gas Flow Laser For Optimization Of Temperature Field
Author(s): Zbigniew Plochocki; Oleg Tschernetsov
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Paper Abstract

A simple linear mathematical model of gas flow and gas temperature distribution in the excitation channel of cow, gas flow lasers with transverse electrical glow discharge is proposed. We aim to describe, explain and control the temperature distribution in order to minimize the effect of the so called temperature-overheating instability of the discharge. The most essential assumption of the model is: gas flow is one-dimensional and relatively slow. The model is determined by a single partial differential equation for temperature, and relatively simple algebraic equations for the velocity and the density'. Inspection of the model and preliminary numerical calculations show, that, in the channel, there exist two near-electrode maxima of temperature /which is in accordance with experimental observations/. Location and height of these maxima are mainly dependent on a competition between on-electrode cooling and near-electrode heating of the gas. This fact seems to enable us to control the temperature distribution to avoid the temperature-overheating instability of glow discharge in the channel.

Paper Details

Date Published: 20 June 1989
PDF: 6 pages
Proc. SPIE 1031, 7th Intl Symp on Gas Flow and Chemical Lasers, (20 June 1989); doi: 10.1117/12.950521
Show Author Affiliations
Zbigniew Plochocki, Polish Academy of Sciences (Poland)
Oleg Tschernetsov, Luikov Institute of Heat and Mass Transfer of the Academy of Sciences of the USSR (USSR)

Published in SPIE Proceedings Vol. 1031:
7th Intl Symp on Gas Flow and Chemical Lasers
Dieter Schuoecker, Editor(s)

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