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含能材料  2014 

含石蜡燃料的能量特性和退移速率测试

DOI: 10.3969/j.issn.1006-9941.2014.04.014

Keywords: 宇航推进理论与工程,含石蜡燃料,混合发动机,能量特性,氧燃比,退移速率

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Abstract:

含石蜡燃料是固液混合火箭发动机的理想能源,采用最小自由能法在富氧、富燃和最佳氧燃比条件下对组分含量不同的含石蜡燃料和端羟基聚丁二烯(HTPB)燃料进行能量特性计算,利用固气矩形混合发动机测试含石蜡燃料和HTPB燃料的退移速率。能量特性计算结果表明:在相同组分配方下,加入AP使燃料中含氧量增多、最佳氧燃比和比冲降低,加入Al能提高燃烧室温度和密度比冲;在相同氧燃比下,含石蜡燃料和HTPB燃料的比冲基本相同。退移速率实验结果表明:在氧气质量流率从25g·s-1增加到40g·s-1时,石蜡燃料的退移速率从0.79mm·s-1增加到1.11mm·s-1,HTPB燃料的退移速率从0.47mm·s-1增加到0.68mm·s-1;石蜡燃料的退移速率约为普通HTPB燃料的1.58~1.74倍。

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