Abstract
Numerical simulation of a supersonic flow chemical oxygen-iodine laser is performed and its gain characteristics are studied. It is assumed that the flow is quasi-one-dimensional and the O2-I2 mixing takes place instantaneously at the iodine injector. The numerical results clearly show that the gas cooling by the supersonic expansion is very effective in obtaining high gain. It is shown that a small signal gain coefficient of 1.5∼2 m<-1> is attained downstream of the nozzle exit. It is also shown, however, that the temperature rise due to the chemical reactions which persist in the flow is quite detrimental to the laser performance.
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