NOx formation in unsteady counterflow diffusion flames
Abstract (Summary)DeBruhl, Christopher Dwayne. NOx Formation in Unsteady Counterflow Diffusion Flames. (Under the direction of Dr. William L. Roberts) The formation of NO and NO2 are sensitive indicators of both temperature and residence time in a combustion environment. In this work, the NOx emission index is measured in an unsteady counterflow diffusion flame with methane, propane or ethylene, as a function of average strain rate and amplitude and frequency an imposed sinusoidal oscillation. These flames varied from non-sooting to high soot loading, and from low average strain rate to near extinction. Due to the relatively long time scales associated with NOx formation, the effect of unsteadiness on emission index is weaker than on either temperature or soot volume fraction. Time averaged global measurements were taken using a NO/NOx analyzer. Methane – air results are compared with unsteady calculations using a modified OPPDIF code included in the Chemkin package.
School Location:USA - North Carolina
Source Type:Master's Thesis
Keywords:north carolina state university
Date of Publication: