铝基微单元复合燃料在NEPE固体推进剂中的应用

Application of Aluminum⁃based Composite Fuel in NEPE Solid Propellant

为研究铝基微单元燃料在硝酸酯增塑聚醚(NEPE)固体推进剂中的应用性能,以铝基微单元复合燃料(Al@AP)代替铝粉加入NEPE固体推进剂,以真空定容爆热试验、发动机试验、残渣活性铝测试、高速摄影、单向拉伸试验、工艺性能测试等手段研究了Al@AP对NEPE固体推进剂燃烧、力学、工艺等性能的影响;并对Al@AP在NEPE固体推进剂中的燃烧作用机理进行了分析。结果表明,以19.5%的Al@AP代替FLQT‑3 Al后,NEPE固体推进剂的爆热由6039.4 J·g^(-1)提升至6924.8 J·g^(-1),残渣量由28.91 g降至7.64 g,残渣活性铝含量由14.64%降至0.37%,残渣粒径d_(50)由94.12μm降至24.21μm,NEPE固体推进剂喷射效率提升,铝粉在燃面停留时间由55 ms缩短至40 ms,且无明显融联团聚现象,且Al@AP对推进剂的燃速、力学、工艺等性能基本无影响。

In order to study the performance of aluminum‑based composite fuel in NEPE solid propellant,the aluminum‑base composite fuel(Al@AP)was used in the NEPE solid propellant instead of aluminum powder,and the effects of Al@AP on the combustion,mechanics,and process performance of NEPE propellant were studied by explosion heat test,engine test,residual active aluminum test,high‑speed photography,unidirectional tensile test and process properties test.And the combustion mechanism of Al@AP in NEPE propellant was derived.Results shows that by replacing FLQT‑3 Al powder with 19.5%Al@AP,the explosion heat of NEPE propellant increased from 6029.4 J·g^(-1)to 6924.8 J·g^(-1),and the mass of residue decreased from 28.91 g to 7.64 g,and the active aluminum content of residue decreased from 14.64%to 0.37%,and the particle size of residue decreased from 94.12μm to 24.21μm.The injection efficiency of NEPE propellant with Al@AP is improved.The residence time of aluminum powder at the burning surface decreased from 55 ms to 40 ms,and there was no obvious agglomeration phenomenon.Al@AP powder has little effect on the dynamic burning rate,mechanics and process properties of NEPE propellant.