Mixing/reacting zone structure and small signal gain coefficient of a supersonic flow chemical oxygen-iodine laser

Wataru Masuda; Manabu Hishida; Naoki Azami; Hiroo Fujii; Toshio Atsuta

doi:10.1117/12.270135

4 April 1997 Mixing/reacting zone structure and small signal gain coefficient of a supersonic flow chemical oxygen-iodine laser

Wataru Masuda, Manabu Hishida, Naoki Azami, Hiroo Fujii, Toshio Atsuta

Author Affiliations +

Proceedings Volume 3092, XI International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference; (1997) https://doi.org/10.1117/12.270135
Event: XI International Symposium on Gas Flow and Chemical Lasers and High Power Laser Conference, 1996, Edinburgh, United Kingdom

Abstract

The flow field of a supersonic flow chemical oxygen-iodine laser is simulated solving three-dimensional Navier-Stokes equations, and the dependence of the mixing/reacting zone structure and the resulting gain region on the effective velocity ratio of I₂ jet to the primary flow is studied. It is assumed that the flow is laminar and the water vapor condensation due to the supersonic cooling is ignored. A chemical kinetic model encompassing 21 chemical reactions and 10 chemical species is used to determine the chemical composition of gas mixture. The I₂He ratio and plenum pressure of the secondary flow are varied in order that the amount of iodine injected into the primary flow is kept constant in each effective velocity ratio. The present results demonstrate that a pair of contrarotating vortices generated behind the I₂ jet greatly enhances the mixing and the simultaneous chemical reaction of I₂ and O₂(¹$DELTA). It is shown that the optimum condition for the secondary I₂ jet momentum exists. The I₂ jet which causes the high gain penetrates into the primary flow moderately deeply and does not collide with the counter one.

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Wataru Masuda, Manabu Hishida, Naoki Azami, Hiroo Fujii, and Toshio Atsuta "Mixing/reacting zone structure and small signal gain coefficient of a supersonic flow chemical oxygen-iodine laser", Proc. SPIE 3092, XI International Symposium on Gas Flow and Chemical Lasers and High-Power Laser Conference, (4 April 1997); https://doi.org/10.1117/12.270135

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