IGNITION DELAY TIMES IN C2H2-O-2-AR MIXTURE BEHIND A REFLECTED SHOCK-WAVE

Detonation characteristics of acetylene were studied behind reflected shock waves in the temperature range 800-1350 K by monitoring OH emiss ion and pressure profiles. For a comprehensive measurement of ignition delay time, the mixture composition was varied in a wide range of Ar mole % was varied from 0.625 to 2.5 in stoichiometric ratio of C2H2-O- 2-Ar. A computer simulation study was also performed to elucidate the important elementary steps determining ignition behavior. The 33-react ion mechanism provides a good agreement in delay time between the obse rved and the calculated ones.