共查询到17条相似文献,搜索用时 437 毫秒
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采用静态与水下声发射法测试了CL-20含量及其粒度级配对NEPE推进剂燃速与压强指数的影响;采用DSC与TG-IR联用研究了CL-20对NEPE推进剂热分解行为的影响。结果表明,随着CL-20质量分数由42%增至50%,推进剂燃速与压强指数上升,燃烧效率提高,表明CL-20氧化能力高于GAP/硝酸酯含能黏合剂体系;随着CL-20/HMX、CL-20/Al质量比增高,推进剂燃速上升,燃烧效率上升;CL-20对推进剂燃速和压强指数的贡献高于HMX;随着CL-20/AP质量比增高,CL-20/AP混合体系分解产物氧化能力降低,燃烧反应速率降低,燃速降低;CL-20粒度级配对NEPE推进剂燃烧行为影响显著,当CL-20的粒径(d50)在5~50μm时,随着细粒度CL-20含量增高,推进剂燃速与燃速压强指数下降;当体系中存在超细粒度CL-20(d50=500nm)时,推进剂燃速与燃速压强指数随着超细粒度CL-20含量的增加而有所增加,4种粒度CL-20对NEPE推进剂燃速的贡献顺序为:粗粒度>中粒度>超细粒度>细粒度。 相似文献
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无铝低燃速NEPE推进剂的燃烧性能 总被引:2,自引:0,他引:2
采用水下声发射法测定了无铝低燃速NEPE推进剂的燃速,研究了增塑剂种类、高氯酸铵(AP)与奥克托今(HMX)含量、AP粒度级配以及降速剂对无铝NEPE推进剂燃烧性能的影响。结果表明,通过选择合适的增塑剂、调整AP/HMX的相对含量、AP粒度级配以及采用有效的降速剂可使推进剂基础配方在3.5MPa下静态燃速达到4.0~5.5mm/s,2~5MPa下静态压强指数可降至0.30以下;NEPE推进剂燃烧时,NO2的生成速度越慢或NO2的含量越低,则推进剂的燃速越小,反之则越高。 相似文献
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《火炸药学报》2015,(5)
设计了以新型碳系纳米材料(CN)为载体的负载燃速催化剂BC-1/CN和BC-2/CN,通过热重(TG)分析和差示扫描量热法(DSC)联用研究了负载燃速催化剂对AP热分解行为的影响,研究了负载燃速催化剂种类和含量对NEPE推进剂燃烧性能的影响。结果表明,CN能够增强BC-1和BC-2对AP热分解的催化作用,从而显著降低AP的分解温度;随着负载燃速催化剂中CN含量的提高,NEPE推进剂在15MPa下的燃速由15.72mm/s增至24.68mm/s,增幅达57%,压强指数由0.60降至0.46;当负载燃速催化剂中CN的质量分数为10%时,NEPE推进剂的燃速高达34.8mm/s,而药浆的工艺性能没有明显恶化,综合作用效果最好。 相似文献
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降低固体推进剂燃速研究进展 总被引:1,自引:0,他引:1
综述了复合推进剂、硝酸酯增塑聚醚(NEPE)推进剂和改性双基推进剂在降低燃速方面的研究进展,并指出未来降低固体推进剂燃速研究的重点为向推进剂中引入含能降速剂及采用热分解温度较高且能量较高的新型含能材料。 相似文献
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含有复合催化剂的Al/HMX/CMDB推进剂样品,在放置3~4周后,爆热、燃速下降,压强指数升高。为找到具体原因,对推进剂试样进行了燃烧性能、真空安定性及DSC热分解实验,并对实验结果进行了系统分析。结果表明:复合催化剂中超细的SnO2具有较强的催化活性,催化推进剂在常温下进行热分解,最终导致推进剂安定性、爆热、燃速下降,压强指数升高。推进剂性能的恶化,严重影响其正常使用。 相似文献
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采用DSC研究了不同形貌的铅盐催化剂CH-Ⅰ和CH-Ⅱ对AP热分解行为的影响,获得了其热分解反应的动力学参数,并考察了催化剂对GAP少烟推进剂燃烧性能的影响。结果表明,铅盐催化剂能够降低AP的低温分解反应活化能,提高高温分解反应速率。在GAP少烟推进剂中,加入铅盐催化剂CH-Ⅰ和CH-Ⅱ,能够显著提高其高压下的燃速,15~25MPa内的压强指数分别由不加催化剂时的0.46降至0.35和0.34。AP的热分解行为与GAP少烟推进剂燃烧紧密相关。AP热分解反应的加快是推进剂燃速提升的主要原因,催化剂的催化活性与其形貌和粒度有关。催化剂CH-Ⅱ的催化效果优于催化剂CH-Ⅰ。 相似文献
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Shrikant M. Pande Vaibhav S. Sadavarte Debdas Bhowmik Dashrath D. Gaikwad Haridwar Singh 《Propellants, Explosives, Pyrotechnics》2012,37(6):707-712
The burning rate pressure relationship is one of the important criteria in the selection of the propellant for particular applications. The pressure exponent (η) plays a significant role in the internal ballistics of rocket motors. Nitramines are known to produce lower burning rates and higher pressure exponent (η) values. Studies on the burning rate and combustion behavior of advanced high‐energy NG/PE‐PCP/AP/Al‐ and NG/PE‐PCP/HMX/AP/Al‐based solid rocket propellants processed by a conventional slurry cast route were carried out. The objective of present study was to understand the effectiveness of various ballistic modifiers viz. iron oxide, copper chromite, lead/copper oxides, and lead salts in combination with carbon black as a catalyst on the burning rate and pressure exponent of these high‐energy propellants. A 7–9 % increase in the burning rates and almost no effect in pressure exponent values of propellant compositions without nitramine were observed. However, in case of nitramine‐based propellants as compared to propellant compositions without nitramines, slight increases of the burning rates were observed. By incorporation of ballistic modifiers, the pressure exponents can be lowered. The changes in the calorimetric values of the formulations by addition of the catalysts were also studied. 相似文献
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A. P. Denisyuk Yu. G. Shepelev D. L. Rusin I.V. Shumskii 《Combustion, Explosion, and Shock Waves》2001,37(2):190-196
High explosives (RDX or HMX) are added to double–base propellant formulations to improve their energy characteristics. The influence of these HE on the catalysis of propellant combustion practically has not been discussed in the literature. The present paper considers the role of RDX and HMX in the catalysis of double–base propellant combustion. Propellants having various compositions and energy characteristics were studied experimentally. It is established that RDX and HMX decrease the burning rate of double–base propellants (without catalysts) with moderate and high calorific values irrespective of their effect on the energy and combustion characteristic of the propellants. It is shown that if the burning rate of a propellant is affected by catalysts, the addition of RDX or HMX to this propellant (in excess of 100%) does not decrease the relative efficiency of catalysis but even increases it somewhat. 相似文献
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研究了硝胺种类、固体组分含量和粒度、增塑剂与GAP的增塑比及燃速催化剂对GAP高能低特征信号推进剂在11~19MPa下燃烧性能的影响。结果表明,当HMX取代推进剂样品中的RDX时,推进剂的燃速较高,压强指数从0.72降至0.63;在AP和HMX总质量分数为67.5%的条件下,随着AP质量分数由5%增至30%,推进剂燃速逐渐增大,压强指数由0.82降至0.45;减小AP粒度以及在配方中添加燃速催化剂或调节过渡金属化合物J1/J2的配比,可较大幅度地增加推进剂燃速和降低压强指数,其中,J1与J2总质量分数为3%,二者质量比为2∶1和1∶1时,推进剂的压强指数较小,分别为0.50和0.48;随着HMX粒度减小及增塑剂与GAP黏合剂的增塑比的降低,推进剂的燃速和压强指数降低。 相似文献
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