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为客观地了解爆震管内火焰燃烧发展变化的过程,首先设计了光电池测量系统,在同一截面上安装了高频响PCB压力传感器、离子探针和光电池。通过测量离子探针和光电池的触发时刻来验证光电池测量火焰信号的正确性,然后通过分析光电池信号的持续时间来间接获得单个截面处火焰燃烧的持续时间。结果表明:当爆震波传出爆震管后,管内仍在继续燃烧,且燃烧持续时间的量级为毫秒级。
In order to understand the development process of flame combustion in detonation tube objectively, a photocell measurement system was first designed and a high-frequency PCB pressure sensor, ion probe and photocell were installed on the same section. The correctness of the photocell measured flame signal was verified by measuring the triggering moment of the ion probe and the photocell and the duration of the flame burning at a single section was indirectly obtained by analyzing the duration of the photocell signal. The results show that when the detonation wave propagates out of the detonation tube, the tube still continues to be burned, and the duration of combustion is on the order of milliseconds.