The powder gas, generated continuously due to burning of propellant forms air-cushion among propellant grains, which can buffer and protect propellant grains from bumping, impacting and extruding.
发射药燃烧时不断产生的燃气在药粒之间形成气垫，对药粒的撞击、挤压起到缓冲保护作用。
In comparison with propellant with pure boron powder, the apparent decomposition heat of propellant with boron composition increases 12.6%.
相对于纯硼粉的推进剂，硼复合粒子的推进剂的表观分解热最高提高了12.6%。
Nevertheless, particle size distribute does not change with the combustion chamber pressure and propellant aluminum powder percentage.
粒子尺寸分布不随燃烧室压强和推进剂铝粉含量变化。
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