The Experimental Evidence for Mach Reflection of Gaseous Detonation Waves Acting on an Obstacle
气相爆轰波在障碍物上Mach反射的实验验证

The experimental evidence for Mach reflection of gaseous detonation waves acting on an obstacle is presented in this paper. Wedges with different wedge angle are mounted on the side wall of tube to form convergent tube. The Mach reflection is shaped when detonation waves propagate on a wedge. The trajectory of triple point of Mach reflected detonation wave was recorded for the first time by smoked foil. On both sides of the trajectory, the change of cell size and shape is very obvious. According to the literature known to us, it is confirmed for the first time by cellular structure that as shock waves in non reactive air, the detonation waves can also shape Mach reflection under certain conditions. These experimental results not only help us deeply understanding the nature of detonation waves but also afford a reference for comparison when we make numerical simulation for this phenomenon.