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Abstract
In case of employing a wedge nozzle for CO2 Gasdynamic Laser (GDL), it is necessary to consider generating an oblique shock wave at the nozzle exit. The translational temperature of the gas increases behind the oblique shock wave. Therefore, the population inversion becomes extinct and the small signal gain is decreased. The laser medium is reheated by passing through the oblique shock wave. In this paper, two dimensional numelical analysis which considers the influence of the oblique shock wave was carried out. In the shock wave configuration, good agreement between the schlieren photograph and the result of calculation is obtained. Experimental value of small signal gain coefficient agrees well with the calculated one.
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