NavierStokes solutions of high energy laser flows
Abstract
This paper deals with the application of computational fluid dynamics to the calculation of the supersonic mixing flow fields in the cavities of supersonic diffusion chemical lasers and downstreammixing gasdynamic lasers. The complete equations of motion of a viscous twodimensional flow (the NavierStokes equations) along with the appropriate finiterate chemical and vibrational rate equations are solved by means of a timedependent finitedifference technique. Results are obtained which represent a third generation of steadyflow, continuous wave high energy chemical and gasdynamic laser calculations. In addition, a series of numerical experiments are described which take advantage of the transient results obtained with the timedependent technique; namely, the effects of intentional unsteady fluctuations in the cavity inlet flow properties are shown to increase the laser gain by more than a factor of two due to enhanced mixing induced by the unsteady flow.
 Publication:

GasFlow and Chemical Lasers
 Pub Date:
 1979
 Bibcode:
 1979gfcl.proc....3A
 Keywords:

 Computational Fluid Dynamics;
 Gasdynamic Lasers;
 High Power Lasers;
 NavierStokes Equation;
 Supersonic Flow;
 Cavitation Flow;
 Chemical Lasers;
 Computation;
 Continuous Radiation;
 Equations Of Motion;
 Finite Difference Theory;
 Flow Distribution;
 Molecular Relaxation;
 Nozzle Geometry;
 Power Efficiency;
 Steady Flow;
 Time Dependence;
 Two Dimensional Flow;
 Lasers and Masers