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为研究氟化物包覆纳米铝粉对端羟基聚丁二烯(HTPB)燃料燃烧性能的影响,采用真空浇注法制备了含氟化物包覆纳米铝粉和不含添加物的两种HTPB燃料,并测试了在氧气流中的燃烧性能。利用NASA-CEA程序计算了两种燃料的理论比冲和绝热火焰温度。结果表明,两种燃料的退移速率都随着氧气质量密流的增加而增大,两种燃料的退移速率与氧气的质量密流关系均满足幂函数,幂函数指数分别为0.704±0.003和0.688±0.002;氟化物包覆纳米铝粉对燃料的退移速率有一定的促进作用,且这种作用不随氧化剂质量密流的变化而变化;在氧化剂质量密流研究范围内,含氟化物包覆纳米铝粉燃料的退移速率比不含添加物的燃料的退移速率高13%左右。氧气与燃料的质量比为2.0时,两种燃料在真空中的理论比冲和绝热火焰温度都达到最大值;氧气与燃料的质量比为0.4~8时,铝粉未能显著提高真空中HTPB燃料的比冲。
In order to study the influence of fluoride-coated aluminum nanopowders on the combustion performance of HTPB fuel, two kinds of HTPB fuels containing fluoride-coated nano-aluminum powder and no additives were prepared by vacuum casting. The combustion performance in the oxygen stream was also tested. The theoretical specific impulse and adiabatic flame temperatures for both fuels were calculated using the NASA-CEA program. The results show that the de-migration rates of the two fuels increase with the increase of the mass flow of oxygen. The relationship between the de-migration rates of the two fuels and the mass flow of oxygen satisfies the power function, the power function indices are 0.704 ± 0.003 And 0.688 ± 0.002, respectively. Fluoride-coated aluminum nanopowders promoted the rate of fuel migration and did not change with the mass flux of oxidant. In the study of the mass flux of oxidant, fluoride The rate of recoil of the coated aluminum nanopowder fuel is about 13% higher than that of the fuel without additives. When the mass ratio of oxygen to fuel is 2.0, the theoretical specific impulse and adiabatic flame temperature of both fuels reach the maximum in vacuum. When the mass ratio of oxygen to fuel is 0.4-8, the aluminum powder can not significantly increase the HTPB in vacuum Than the fuel red.