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通过设计实验装置形成了一条预制裂纹 ,用高速运动分析仪及数据采集系统测试了火焰在裂纹内的传播及裂纹内的压强变化 ,研究了不同几何特性和增压下 ,固体推进剂裂纹的燃烧流动情况。实验表明 :裂纹内的火焰传播速度受裂纹几何条件和增压的共同影响 ,增压越大 ,裂纹越窄 ,火焰传播速度越大。裂纹尖端压强与裂纹入口压强比的最大值也受增压和几何条件的影响 ,增压越大 ,裂纹越窄 ,该压强比越大。
A prefabricated crack was formed by designing the experimental device. The propagation of the flame in the crack and the pressure change in the crack were tested by a high-speed motion analyzer and a data acquisition system. The combustion of the solid propellant crack under different geometric characteristics and pressurization was studied. Flow situation. Experiments show that the propagation speed of flame in the crack is affected by both the geometric conditions of the crack and the supercharging pressure. The larger the supercharging pressure is, the narrower the crack is and the greater the flame propagation speed is. The maximum value of the crack tip pressure and crack inlet pressure ratio is also affected by the supercharging and the geometric conditions. The larger the supercharging pressure and the narrower the crack, the greater the pressure ratio.