A twodimensional flow model of laser supported combustion waves
Abstract
The comparison of models of Laser Supported Combustion (LSC) waves in air with experimental observations has shown that the predicted wave velocities are much smaller than those measured. An examination is presently conducted of the effects of twodimensionality on the flow and it is found that, for laser beams of small diameter, the hot gas and plasma in the wave expand laterally at constant pressure and velocity. This allows the spillage of both mass and energy from the beam. These effects are approximately modeled to yield a nonlinear variation of Raizer's (1980) linear eigenvalue formulation for LSC wave speed. Numerical solutions show the same threshold behavior as the Raizer model, but predict higher wave speeds. These wave speeds compare well with measurements.
 Publication:

16th Fluid and Plasma Dynamics Conference
 Pub Date:
 July 1983
 Bibcode:
 1983fpdy.confS....K
 Keywords:

 Combustion Physics;
 Flame Propagation;
 Laser Outputs;
 Two Dimensional Flow;
 Two Dimensional Models;
 Eigenvalues;
 Flow Geometry;
 Laminar Flow;
 Mathematical Models;
 Propagation Velocity;
 Fluid Mechanics and Heat Transfer