A sector-PDE(pulse detonation engine) with an internal diameter of 90 mm and an external diameter of 200 mm was designed.Its length is 1 500 mm and its sector angle is 60°.Two types of air-valves(orifice type and vortices type

respectively) were used to get appropriate mixture of air and oil

and their performances on detonation were compared.The results indicated that the designed PDE could operate at a frequency up to 40 Hz.In addition

the text gives the results of different shock-wave reflectors' comparison: the inverted reflector has high performance on initiating detonation.