Chemical Reaction in a Shock Wave. I. The Ignition Delay of a Hydrogen-Oxygen Mixture in a Shock Tube

Abstract

Abstract The values of the ignition delay of a hydrogen-oxygen mixture with a diluent in the reflected shock waves were measured by using a shock tube equipped with a piezo gauge for shock velocity measurements and a photomultiplier or another piezo gauge for the measurement of the time of ignition. There was the following relationship between the ignition delay, τ, and the temperature, Tr, behind the reflected shock wave: log10τ[O2](mol.l−1sec.)=−9.581+3559⁄Tr where 825≤Tr≤1360°K and 7.6×10−4≤[O2]≤3.0×10−3 mol./l. The difference between this relationship and that set forth by other authors has been discussed.