The characteristics of premixed gas detonation wave propagating in two tubes with diameter

20 mm and 60 mm respectively

were investigated.Primarily

the detonation wave pressures and velocities were measured

and the mixture pressure

concentration

equivalence ratio

and the dimension of connection tube were considered in the study.It was found that the detonation could appear in the bigger tube even when the detonation was not triggered in the smaller tube.The connection tube with smaller diffusion angle is favorable for detonation re-triggering.The pressure and velocity of re-triggered detonation are affected by mixture pressure

concentration

and equivalence ratio.