Emissions, spectrum and simulation data for gliding arc plasma assisted NH3-air mixtures for different global equivalence ratios

This study introduces a novel approach by applying plasma directly to the fuel stream in plasma-assisted swirl ammonia-air flames, facilitating immediate premixing after plasma interaction. This study bridges the gap in plasma-assisted ammonia combustion by simultaneously enhancing flame stability and reducing NOₓ emissions. It is the first to focus on generating NH₂ radicals through plasma actuation while maintaining OH production, thereby promoting the De-NOₓ pathway and significantly decreasing NOₓ emissions. Additionally, the present combustor achieves 45–60% reduction in NOₓ emissions while consuming only 1.4% of the power compared to existing literature.All data recorded in this study are provided in the accompanying .xlsx file, organized into multiple tables. Table 1 presents emissions under plasma and no-plasma conditions, normalized to 15% dry oxygen. Table 2 provides the stability map for no-plasma conditions across a wide range of ammonia and air flow rates, while Table 3 shows the effect of plasma on lean and rich blowout limits. Table 4 reports the plasma-induced enhancement (in percentage) of OH, NH, and NH₂* intensities measured by the spectrometer, and Table 5 compares the NOx emission mitigation capacity of the present study with results from similar studies in the literature. Finally, Table 8, based on numerical simulations, indicates the production rates of different reactions with and without plasma at equivalence ratios of 0.8 and 0.9.