包覆及团聚硼对富燃料推进剂燃烧性能的影响

研究了硼粉表面包覆材料的种类和含量及团聚硼的含量对富燃料推进剂燃烧性能的影响。结果表明,团聚硼有利于提高推进剂的燃速与燃速压强指数;包覆材料AP的含量对推进剂燃烧性能的影响较为复杂,低含量有利于提高推进剂的低压燃速,但对燃速压强指数不利,高含量有利于提高推进剂的燃速压强指数,但对低压燃速不利;包覆材料L iF有利于提高推进剂的低压燃速,但过高的含量降低了推进剂的燃速压强指数。

Effect of coated and agglomerated boron on combustion characteristics of boron-based fuel-rich propellants

The effects of various factors,such as the content of the agglomerated boron,the types and contents of coating materials on the combustion characteristics of the boron-based fuel-rich propellants were experimentally investigated.The results show that propellants with agglomerated boron give higher burning rate and pressure exponent.Propellant with low AP coating gives higher burning rate at low pressure and poorer pressure exponent.High AP coating gives higher pressure exponent and poorer burning rate at low pressure.Coating of LiF can improve the burning rate of boron-based propellant at low pressure.While higher LiF coating has negative effect on pressure exponent.