Numerical analysis of O2 and H2O effects on CO2 gas dynamic lasers

K. Ebina; T. Yokozawa; Shigeru Yamaguchi; Hirotaka Kanazawa; Hiroshi Hara; Yasuharu Mine; Katsuhiko Komatsu; Hideaki Saito

doi:10.1117/12.144655

4 May 1993 Numerical analysis of O2 and H2O effects on CO2 gas dynamic lasers

K. Ebina, T. Yokozawa, Shigeru Yamaguchi, Hirotaka Kanazawa, Hiroshi Hara, Yasuharu Mine, Katsuhiko Komatsu, Hideaki Saito

Author Affiliations +

Proceedings Volume 1810, 9th International Symposium on Gas Flow and Chemical Lasers; (1993) https://doi.org/10.1117/12.144655
Event: Ninth International Symposium on Gas Flow and Chemical Lasers, 1992, Heraklion, Greece

Abstract

A six-temperature vibrational relaxation model that takes into account the vibrational levels of O₂ and H₂O is proposed, based on which a simulation code has been developed with which analyses have been conducted on the effects brought on the performance of combustion- driven gasdynamic lasers by the presence of O₂ and H₂O in the medium. Inclusion of the vibrational levels of O₂ and H₂O in the vibrational relaxation model has proved to ensure good agreement of estimated results with experimental data over a wide range of gas composition (0 - 40% O₂, 0 - 10% H₂O). Both calculation and experiment have indicated that with the presence of 3% H₂O, an increase of 1% in O₂ concentration would lower the small signal gain by 1%. The simulation estimated that increasing concentration of H₂O in the laser medium accentuates the effect of O₂ on the lasing performance. This six-temperature vibrational relaxation model should permit reliable analysis to be performed on gasdynamic laser characteristics even when large amounts of O₂ and H₂O are present in the medium.

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K. Ebina, T. Yokozawa, Shigeru Yamaguchi, Hirotaka Kanazawa, Hiroshi Hara, Yasuharu Mine, Katsuhiko Komatsu, and Hideaki Saito "Numerical analysis of O2 and H2O effects on CO2 gas dynamic lasers", Proc. SPIE 1810, 9th International Symposium on Gas Flow and Chemical Lasers, (4 May 1993); https://doi.org/10.1117/12.144655

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