Particle size distributions in turbulent premixed ethylene flames crossing the soot inception limit

The current study presents novel experimental data on soot particle size distributions (PSDs) with mobility diameters in the range 4≤Dm[nm]≤230 obtained from four premixed turbulent ethylene-air flames crossing inception limit. are stabilised against hot combustion products nitrogen diluted hydrogen a back-to-burnt (or fresh-to-burnt) opposed jet configuration. burner features fractal grid generated turbulence to provide accurate control of turbulence. A scanning sizer (SMPS) equipped nano- and long–DMA columns coupled dual dilution port quartz probe is used comprehensive analysis optimal sampling conditions minimise losses presented. Spatially resolved along stagnation point streamline show evolution PSDs through flame brush. It shown that transport distributes particles across mixing layer between two jets maximum median mean found close point. impact estimated total rate strain (420≤aT[s−1]≤610) equivalence ratio (1.8≤ϕUN≤2.2) also quantified.