Experimental study of the mixing process of pulse detonation combustion

The experimental study on the mixing chamber of pulse detonation engine prototype is performed. Five different mixing chamber geometries are tested experimentally with the stoichiometric gasoline-compressed air at frequency of 6 Hz and the effect of screw-pitch and inner diameter ratio on the performances of PDE is investigated. The experimental results indicate that disturbance device greatly enhances the fuel-air mixing. Different screw-pitch and inner diameter ratios can affect the formation of the detonation wave. Steady and fully-developed detonation waves are successfully obtained when screw-pitch and inner diameter ratio is approximately 0.77, with the shortest deflagrate to detonation transition (DDT) distance.