Spectral and total radiation properties of turbulent carbon monoxide/air diffusion flames

Abstract

A study of the structure and radiation properties of round turbulent carbon monoxide/air diffusion flames is described. Measurements of mean and fluctuating streamwise velocity and mean temperatures, concentrations of major gas species, spectral radiation intensities, and radiant heat fluxes were made. The measurements were used to evaluate predictions based on the laminar flamelet concept and narrow-band radiation models, both ignoring (using mean properties) and considering (using a stochastic method) the effects of turbulence/ra diation interactions. State relationships were found by correlating auxiliary measurements in laminar flames. Structure and radiation predictions were reasonably good for present test conditions. The effects of turbulence/ra diation interactions were small for these reactants (increasing spectal intensities ca. 10%) since radiation properties vary slowly with mixture fraction near stoichiometric conditions.