共查询到17条相似文献,搜索用时 156 毫秒
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硝胺发射药燃速压力指数转折及其改善途径 总被引:3,自引:0,他引:3
综述了硝胺发射药燃烧方面的研究工作,从发射药配方研究角度总结了影响硝胺发射药燃速压力指数的一些基本因素,指出了改善硝胺发射药燃烧性能的一些有效途径;初步讨论了硝胺发射药燃烧改良剂的选择和使用。 相似文献
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通过密闭爆发器恒压燃速仪对四种硝胺发射药在50~400MPa 压力范围的燃速测定,分析了它们的燃烧规律,发现在黑索今(RDX)基硝胺发射药中,除加入硝基胍作为燃速改良剂外,另一种化合物(二叠氮基乙基硝基胺)的加入。更有效地改善了黑索今基硝胺发射药 u-P 曲线转折的程度,并使压力指数控制在1.00左右。 相似文献
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通过密闭爆发器恒压燃速仪对四种硝胺发射药在50-400MPa压力范围的燃速测定,分析了它们的燃烧规律,发现在黑索今基硝胺发射药中,除加入硝基胍作为燃速改良剂外,另一种化合物的加入。更有效地改善了黑索今基硝胺发射药u-p曲线转折的程度,并使压力指数控制在1。00左右。 相似文献
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NGu对含RDX硝胺发射药燃烧性能的影响 总被引:1,自引:0,他引:1
为从微观的角度研究NGu对含RDX的硝胺发射药燃速压力指数改变的影响,采用改进的小型点火燃烧模拟装置,在35MPa左右对几种发射药进行低压中止燃烧实验.通过SEM电镜观察发射药在低压下燃烧的表面状况.结果表明,在硝胺发射药的燃烧过程中,NGu在燃烧表面形成较厚的熔融层,抑制了RDX的爆燃;RDX的爆燃与燃烧表面熔融层之间的"均衡状态"影响发射药燃速压力指数的变化,当RDX与NGu质量比小于1时,燃速压力指数明显降低;当RDX和NGu同时存在时,发射药的燃烧表面有针状晶体生成. 相似文献
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含FOX-7发射药的燃烧性能 总被引:1,自引:0,他引:1
采用常规密闭爆发器研究了含FOX-7硝胺发射药的燃速、压强指数和压强变化率。结果表明,随着样品中FOX-7含量的增加,发射药的点火延滞时间增加,燃速系数减小,燃速降低;其压强变化率的最大值及增长速率均降低。当燃烧压强小于150MPa时,FOX-7含量对发射药的压强指数没有影响,FOX-7改善发射药压强指数的能力不明显;随着燃烧压强的增加,含FOX-7发射药的压强指数降低,尤其当燃烧压强大于200MPa时,发射药的燃速压强指数显著降低。随着发射药中FOX-7含量的增加,其压强指数及燃速系数均降低,有利于发射药的稳定燃烧。 相似文献
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针对高能硝胺发射药在静态下燃速压力指数大的特殊燃烧性能,通过30mm高压模拟炮试验,采用与制式单基药相对比的研究分析方法,对高能硝胺发射药在火炮膛内条件下的基本燃烧特征进行了研究分析。 相似文献
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《Propellants, Explosives, Pyrotechnics》2017,42(11):1261-1267
The effect of nitramine particle size on the combustion behavior of inert binder based propellants has been extensively studied for RDX and HMX, but not CL‐20. Although materials such as RDX and HMX are useful for particular combustion applications, CL‐20 has a greater potential to improve the oxygen balance and energy density of a propellant. The current work investigates the effect of CL‐20 particle size on the combustion of CL‐20/HTPB propellants down to submicrometer sizes. An influence of particle size on the burning rate and combustion mechanism is reported. The 30 micrometer formulation burning rate data showed evidence of convective burning specifically at higher pressures, but the pressure dependence was comparable to neat CL‐20 at pressures below 8 MPa. A change in the combustion mechanism of the submicrometer formulation as a function of pressure was determined to be a result of the interaction of the propellant flame and the combustion residue. Data suggested that at low pressures diffusion in terms of active cooling was dominant for the submicrometer formulation. Higher pressure data for both the submicrometer and 3 micrometer formulations suggest the degree of active cooling is decreased as the burning rate pressure exponent is near 0.5 for both propellants. The indirect evidence for the presence of a melt layer for CL‐20 propellants is discussed. 相似文献
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A theoretical model of the combustion of a nitramine solid propellant in the presence of a plasma jet is proposed. Unlike standard double‐base compositions, nitramine propellants exhibit experimental evidence that plasma induces a burning rate enhancement. The model is based on heat transfer considerations and proposes a closed‐form solution of the enhancement of the propellant burning rate as a function of the thermophysical parameters of the system. The model provides a good qualitative agreement with experimental results. 相似文献
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Shrikant M. Pande Vaibhav S. Sadavarte Debdas Bhowmik Dashrath D. Gaikwad Raja V. Singh Haridwar Singh 《Propellants, Explosives, Pyrotechnics》2012,37(2):241-245
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/HMX/AP/Al based solid propellant processed by slurry cast route were carried out using varying percentages of HMX and AP. It was observed that propellant compositions containing only AP and Al loaded (total solids 75 %) in NG plasticized PE‐PCP binder produce comparatively lower pressure exponent (η) values similar to AP‐Al filled HTPB based composite propellants. However, energetic propellants containing high level of nitramine (40–60 %) produce high pressure exponent (0.8–0.9) values in the same pressure range. Incorporation of fine particle size AP (ca. 6 μm) and change in its concentration in the propellant composition reduces η value marginally and influences the burning rate. However, such compositions have higher friction sensitivity. 相似文献