铝粉含量和粒度对NEPE推进剂燃速影响的模型化

Modeling Effects of Aluminum Content and Particle Size on NEPE Combustion Performance

以高能固体推进剂热分解特性和燃烧模型的研究成果为基础，建立了由化学结构参数计算NEPE推进剂的燃速和压力指数的公式，计算了铝粉含量和粒度变化对燃烧性能的影响。结果表明，计算结果与实测燃速值的偏差全部在4-15％以内，且70％的误差在10％以内。预估在小于5MPa下，使用细粒度的铝粉（1—3μm）可显著降低NEPE推进剂的压力指数。

A numerical model for simulating the buringing rate and pressure of NEPE propellant was developed based on the chemical structure of component, thermal behavior and combustion characteristics. Burning rates of three NEPE propellant formula containing the aluminum were calculated and compared with the experimental results to study the effects of aluminum particle content and particle size on the propellants combustion characteristics systematically. Results show that the errors of burning rate of NEPE are within ~ 15% between calculated and experimental results, and 70% in which is within ＋ 10%. The model predicts there is a low pressure exponent under 5 MPa by using 1 - 3 μm fine aluminum powder.