A simple model of the transverse injection chemical laser nozzle

In the design of chemical laser configurations, certain difficulties have been experienced with the nozzle. One of a number of novel approaches investigated was related to the transverse injection of the fuel into the oxidizer stream. During the initial performance projections for a transverse injection chemical laser, it became apparent that the viscous nozzle analysis, used to determine the initial conditions for the lasing cavity efficiency calculation, was not flexible enough to determine the losses due to the injection of the fuel jet. A simple model of the fluid dynamics of the transverse injection was developed with the aim to alleviate this situation. In the present paper, a model for the transverse injection chemical laser is presented. This model provides an analytic tool for determining the effect of geometry and flow composition on the lasing cavity entrance conditions.