Shock-tube study of the oxidation of acetaldehyde at high temperature

The combustion characteristics of a mixture of acetaldehyde, oxygen and arg on behind a reflected shock wave at temperatures ranging fi;om 1320 to 1897 K at 100 torr were studied. The emission from the OH radical at 306.4 nm a nd the pressure profile behind the reflected shock were measured to monitor ignition delay time. The ignition delay times were computed from a propose d mechanism of 110 elementary reactions involving 34 species. The simulatio n and sensitivity analysis confirms that the main channel for oxidation of acetaldehyde at high temperature consists of the Rice-Herzfeld mechanism, t he decomposition and oxidation of HCO, and the reaction of H with O-2.