NavierStokes solutions for chemical laser flows. Part 1: Cold flows
Abstract
This work is part of an overall effort to apply detailed and accurate computational fluid dynamic techniques to the solution of practical high energy laser flows. In particular, the complete NavierStokes equations are used to calculate the supersonic laminar mixing flows associated with HF chemical lasers. Multicomponent diffusion is treated in a detailed fashion. Solutions are obtained for 'cold flows', where the effects of chemical reactions and vibrational relaxation are not included. Although such a situation is purely artificial, the results do isolate some of the fluid dynamic aspects of chemical laser flows, and provide a set of data to be compared later with hot flow calculations. These results also lend encouragement that solving chemical laser flows by means of the complete NavierStokes equations is feasible. Finally, a set of numerical experiments using four different timedependent finitedifference schemes show that relatively minor changes in the differencing procedure can lead to major variations in the results. A modification of the wellknown MacCormack approach appears to be the best suited for mixing flows associated with chemical lasers.
 Publication:

Maryland Univ. College Park Report
 Pub Date:
 June 1975
 Bibcode:
 1975umd..rept.....K
 Keywords:

 Chemical Lasers;
 NavierStokes Equation;
 Supersonic Flow;
 Gas Dynamics;
 Laminar Flow;
 Thermal Conductivity;
 Lasers and Masers