Abstract

The dominant physical processes in a liquid spray fueled burner (fuel evaporation, turbulent mixing, and chemical reaction) are characterized by time scales which typify the importance of each process. Guided by a physical model of the flame structure in the wake of a disc with liquid fuel injected into the wake region from the center of the disc, the developed characteristic times are combined to form burner output correlating parameters. The success of these parameters is demonstrated by the correlation of both carbon monoxide and oxides of nitrogen exhaust emissions from the disc burner for various geometries, a wide range of burner operating conditions, and two different fuels. In addition since carbon monoxide and oxides of nitrogen emissions originate primarily in separate regions of the flame, analysis of the characteristic times reveals a means of optimizing the burner geometry to minimize pollutant emissions.

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