The Evaluation of Flame Behavior by Spectrum Analysis of a Flame : 2nd Report, Study of an Application to a Large Oil Flame

Abstract

The application of spectrum analysis in the visible wavelength region of a large flame was studied theoretically and experimentally. Theoretical study of a flame model, which has a temperature distribution with some variations of optical thickness, indicated that the apparent mean emissivity of continuum emission, calculated on a hypothesis of gray approximation, was applicable to large industrial flames to evaluate flame conditions. An experimental study using a large (12 MW) oil flame also supported the appropriateness of the theoretical study and the apparent mean emissivity was evaluated to correlation well with NO_x emissions corresponding to the various kinds of flame conditions.