Navier-Stokes solutions for chemical laser flows

A third generation of supersonic diffusion chemical laser analysis is introduced, namely, the complete solution of the Navier-Stokes equations for the supersonic mixing flowfield, fully coupled with chemical kinetics for both the hot and cold reactions for HF. Results are obtained for laminar-flow conditions and show that such Navier-Stokes solutions are feasible for studying specific cases of interest. A comparison is made between cold flows (chemical kinetics switched off) and hot flows (with fully coupled chemical kinetics). The results show that temperature distributions are affected the most and velocity distributions the least by chemical energy heat release. The results have impact on the interpretation of cold-flow aerodynamic experiments in the laboratory, and their proper extrapolation to the real chemical-laser flows. Also, comparisons between the present Navier-Stokes results and other, more approximate, existing calculations, are made. Advantages of the Navier-Stokes solutions are delineated.

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