a b s t r a c tWe report an experimental and modeling study on prompt-NO formation in low-pressure (5.3 kPa) premixed flames. Special emphasis is given to the quantitative detection (and prediction) of NCN, whose role in prompt-NO formation has recently been confirmed in alkane flames. Here a rich (U = 1.25) CH 4 -O 2 -N 2 flame and rich (U = 1.25) and stoichiometric C 2 H 2 -O 2 -N 2 flames have been investigated. Absolute concentration profiles of CH and NCN radicals and NO species are obtained by combining…
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