关键词: 在静态点火条件下对复合推进剂和双基推进剂裂纹燃烧进行了实验研究.结果表明,火焰传播速度随裂纹高度减小而增大;当裂纹高度变小时,裂纹中燃烧产生的最大压力增加,火焰传播至裂纹末端后,燃烧区立即形成,并伴随着明显的压力突升.

Abstract: The combustion characteristics of double-base and composite prope-llant grains with interior cracks were studied experimentally at atmospheric temperature and various pressures. It is shown that the flame propagation speed is increased with the reduce of the crack depth and as the depth of crack decreases, the maximum pressure coursed by combustion in cracks is increased. It is also discovered that when the flame spreads to the end of a crack, a combustion zone is formed immediately near the crack tip accompanied with a obvious pressure protrusion.

Key words: Propellant combustion;Flame propagation;Solid rocket engine