A Study on Interaction Phenomenon of a Detonation Wave with a Shock Wave

Abstract

By using the sooted plate technique, a detonation cellular pattern is recorded. The cell width λ is a parameter that depends on the chemical reaction rate of the mixture. Therefore, many studies have been carried out to measure the cell width under various mixture conditions. Hence, it can be expected that the cell width is a function of the local thermodynamic properties of the mixture. In the present study, which is a fundamental study on detonation cellular structure, we focused on the change in the detonation cellular structure with change in the local thermodynamic properties. In this study, the change is made by a head-on collision with a shock wave. A detonation wave collides with shock waves of the different strength in stoichiometric hydrogen-oxygen mixtures. The change in the cell width is measured on the basis of the soot track record. It is clearly observed that the cell width changes after the collision. The cell width decreases with increasing shock wave strength. The relation between the cell width and pressure and temperature of the stoichiometric oxyhydrogen mixture is obtained under the present experimental conditions.