Abstract: It is very difficult to detonate in a multi-cycle detonation engine filled with liquid fuel/air aerosol initially at 300K and 1atm as the detonable mixture, whose successful detonation have not been reported up to present. In the study, main components of the multi-cycle two phase pulse detonation engine utilizing liquid gasoline/air mixture are designed carefully, which includes detonation tube, air intake valve-aerovalve, fuel injection device, ignition system and controller etc. Experiments with various parameter combinations are performed and fully developed detonation occurres stably. According to the research, the detonation wave strength, velocity and deflagration to detonation transition（DDT） length are obtained and influenced greatly by such parameters as the block factor of the aerovalve, turbulizer parameter, droplet diameter and igniter location.

Key words: detonation, two phase pulse detonation engine, experimental research, aerovalve, environmental condition