Single-Cycle Detonation in Millimeter-Scale Tube

High-speed camera and pressure transducers were used to study the phenomenon of detonation combustion of acetylene/air mixture in millimeter-scale tube.The peak pressure of detonation wave in 10,mm stainless steel tube was about 2.7,MPa with the velocity of 1,428.6,m/s.Three types of flames were observed in the transparent tube:oscillating flame,deflagration flame and detonation flame.The velocity of detonation wave in the transparent tube was 1,450,m/s.The results show that fully-developed detonation waves of acetylene/air mixture can be formed in both stainless steel and transparent millimeter-scale tubes.