Effects of NO2 addition on hydrogen ignition behind reflected shock waves

Ignition delay time measurements of H2/O2/NO2 mixtures diluted in Ar have been measured in a shock tube behind reflected shock waves. Three different NO2 concentrations have been studied (100, 400 and 1600 ppm) at three pressure conditions (around 1.5, 13, and 30 atm) and for various H2–O2 equivalence ratios for the 100 ppm NO2 case. Results were compared to some recent ignition delay time measurements of H2/O2 mixtures. A strong dependence of...