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Characteristics of a CW HF chemical laser calculated from a simplified two-dimensional model

Published online by Cambridge University Press:  09 March 2009

Zhou Xuehua ,
Chen Liyin  and
Chen Haitao
Zhou Xuehua
Affiliation:
Institute of Mechanics, Academia Sinica, Beijing, People's Republic of China
Chen Liyin
Affiliation:
Institute of Mechanics, Academia Sinica, Beijing, People's Republic of China
Chen Haitao
Affiliation:
Institute of Mechanics, Academia Sinica, Beijing, People's Republic of China
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Abstract

A two-dimensional simplified model of an HF chemical laser is introduced. Using an implicit finite difference scheme, the solution of two adjacent parallel streams with diffusion mixing and chemical reaction is generated. A contour of the mixing and reaction boundary is obtained without presupposition. The distribution of the HF(u) concentrations, gas temperature and the optical small signal gain (αu, J) on the flowing plane (X, Y) are presented. Compared with the solution solved directly from a set of Navier–Stokes equations, the results of these two methods agree with each other qualitatively. The influences of the different velocity, temperature (T0) and composition of the two streams on the small signal gain after the nozzle exit are investigated. It is interesting that for larger J with a fixed u, the peaks of αu, J—T0 profiles move towards higher T0. The computing method is simple and only a short computing time is needed.

Type
Research Article
Information
Laser and Particle Beams , Volume 4 , Issue 2 , May 1986 , pp. 167 - 181
Copyright
Copyright © Cambridge University Press 1986

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