Statistical and spectral properties of a diffusion flame in a coflowing stream
Abstract
An initial step into the understanding of turbulent transport in reacting flows is presented in terms of the statistical temperature behavior of a jet diffusion flame in a coflowing air stream. Nonintrusive temperature measurement by laser Rayleigh scattering techniques is employed. Previous cold flow axial concentration measurements indicate a reduction in average centerline concentration with increasing velocity ratio of coflow to fuel when this ratio is less than unity. In accordance, the present work indicates a similar result in that the axial mean temperature decreases with decreasing velocity ratio for values less than unity. This is attributed to the increased mixing at lower velocity ratios resulting from large scale structure evolution.
 Publication:

26th AIAA Aerospace Sciences Meeting
 Pub Date:
 January 1988
 Bibcode:
 1988aiaa.meetX....G
 Keywords:

 Combustible Flow;
 Diffusion Flames;
 Parallel Flow;
 Statistical Analysis;
 Transport Theory;
 Combustion Chambers;
 FuelAir Ratio;
 Rayleigh Scattering;
 Turbulent Jets;
 Turbulent Mixing;
 Fluid Mechanics and Heat Transfer