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A shock tube study of high temperature reaction of CO–N2O–H2 mixtures and its application to CO2 gasdynamic laser

Published online by Cambridge University Press:  09 March 2009

H. Miyama ,
N. Fujii ,
N. Takeishi ,
T. Tokuda  and
N. Sakatsume
H. Miyama
Affiliation:
Department of Chemistry, The Technological University of Nagaoka, Kamitomioka, Nagaoka 940–21, Japan
N. Fujii
Affiliation:
Department of Chemistry, The Technological University of Nagaoka, Kamitomioka, Nagaoka 940–21, Japan
N. Takeishi
Affiliation:
Department of Chemistry, The Technological University of Nagaoka, Kamitomioka, Nagaoka 940–21, Japan
T. Tokuda
Affiliation:
Department of Chemistry, The Technological University of Nagaoka, Kamitomioka, Nagaoka 940–21, Japan
N. Sakatsume
Affiliation:
Department of Chemistry, The Technological University of Nagaoka, Kamitomioka, Nagaoka 940–21, Japan
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Abstract

In order to investigate the gasdynamic laser (GDL) a conventional pressure driven shock tube equipped with the nozzle apparatus was used. Kinetic study of CO2 formation in CO–N2O–H2 system behind a reflected shock wave was carried out by measuring 4·25 μm emission of CO2. Then, population inversions of the vibrational level of CO2 in an expanding flow of mixtures containing CO2 produced by high temperature reaction of CO–N2O–H2 system behind reflected shock wave were observed by measuring 10.6 μm small signal gains. The experimental data are compared with those obtained by computer simulation assuming quasi-one dimensional steady flow and three vibrational energy modes model. The optimum conditions for CO2 gasdynamic laser by using the shock heated CO–N2O–H2 system are discussed.

Type
Research Article
Information
Laser and Particle Beams , Volume 7 , Issue 1 , February 1989 , pp. 145 - 156
Copyright
Copyright © Cambridge University Press 1989

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