The effect of mixing rate on pressure fields in confined flows
Abstract
Results are presented for a study designed to develop a mathematical model to compute the pressure field in chemical laser cavities with an explicit threedimensional flowfield, to implement the model to determine the degree of correlation between theory and experiment, and to perform a parametric study to assess the effect of assumptions used in defining the mixing rate on the pressure field and boundary layer separation characteristics along the cavity side wall. Details of the development of the governing equations, simplifying assumptions and chemical kinetics model are given. Also discussed is the method used to compute the mixing rate and how the initial (cavity entrance) conditions are established. The mixing model has shown that there are large variations in the mixing profile due to the transverse variations in temperature and pressure. Increasing the transverse diffusion affects significantly the pressure and velocity profiles, which in turn affects the mixing profile. The flowfield is not fully turbulent over most of the laser power extraction region.
 Publication:

AIAA, Aerospace Sciences Meeting
 Pub Date:
 January 1977
 Bibcode:
 1977aiaa.meetR....Z
 Keywords:

 Boundary Layer Separation;
 Chemical Lasers;
 Laser Cavities;
 Mixing;
 Pressure Distribution;
 Boundary Layer Equations;
 Computer Techniques;
 Correlation;
 Mathematical Models;
 Rates (Per Time);
 Reaction Kinetics;
 Three Dimensional Boundary Layer;
 Fluid Mechanics and Heat Transfer