Shock tube and modeling study of the ignition of propane

The ignition of propane was investigated behind reflected shock waves in th e temperature range of 1350-1800 K and the pressure range of 0.75-1.57 bar. The ignition delay time was measured from the increase of pressure and OH emission in the C3H8-O-2-Ar system. The relationship between the ignition d elay time and the concentrations of propane and oxygen was determined in th e form of mass-action expression with an Arrhenius temperature dependence. The numerical calculations were also performed to elucidate the important s teps in the reaction scheme of propane ignition using various reaction mech anisms. The ignition delay times calculated from the mechanism of Sung et a l.(1) were in good agreement with the observed ones.