Synthesis of metallized kerosene gel and its characterization for propulsion applications
Synthesis of metallized kerosene gel and its characterization for propulsion applications
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金属化煤油凝胶的合成及其推进应用的表征
DOI：
10.1016/j.fuel.2019.116684
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发表时间：
2020-02-15
期刊：
影响因子：
7.4
通讯作者：
Feng, Yunchao
中科院分区：
文献类型：
--
作者：
Yang, Dali;Xia, Zhixun;Feng, Yunchao
在提高密度比冲方面，金属化凝胶的潜在优势是十分诱人的。对于推进应用，稳定的悬浮液和高浓度的金属颗粒是必要的特性。基于此，本文首先对金属化煤油凝胶的合成进行了实验研究。聚酰胺树脂作为胶凝剂用于固化煤油和稳定微米级硼和铝颗粒。金属颗粒浓度可以高达45重量%，胶凝剂浓度为3重量%，并保持稳定至少半年，这是有吸引力的性能，用于推进应用。含45wt%硼颗粒的煤油凝胶的密度是纯煤油的1.44倍，这对于满足提高密度比冲的要求是非常有吸引力的。随后，研究了金属化凝胶的物理性能，如流变性能和表面张力。结果表明，胶凝剂的加入使煤油的粘度增加，但表面张力降低。此外，金属粒子的加入会增加煤油凝胶的粘度和表面张力。最后，研究了金属化凝胶的喷雾燃烧特性。首次实验结果表明，金属颗粒，如硼（5 μ m）和铝（25 μ m），可以成功地点燃煤油凝胶喷雾火焰。因此，可以得出结论，我们制备的金属化煤油凝胶是稳定的，适合于推进应用。
The potential advantage of metallized gel is very attractive for the sake of increasing density specific impulse. For propulsion application, stable suspension and high concentration of metal particles are requisite characteristics. Motived by this, the synthesis of metallized kerosene gel is experimentally investigated first. Polyamide Resin is used as gellant to solidify kerosene and stabilized micron-sized boron and aluminum particles. The metal particles concentration can be up to 45 wt% with a gellant concentration of 3 wt% and remain stable for at least half year, which is attractive behavior for propulsion application. The density of the kerosene gel containing 45 wt% boron particles is 1.44 times that of pure kerosene, which is very attractive to meet the requirement for increasing the density specific impulse. Subsequently, the physical properties of the metallized gel are studied, such as rheological properties and surface tension. Results show that the addition of gellant increases the viscosity of kerosene, but decrease the surface tension of which. Besides, the addition of metal particles will both increase the viscosity and surface tension of kerosene gel. Lastly, the spray combustion characteristics of metallized gel are investigated. First experimental results indicate that metal particles, such as boron (5 mu m) and aluminum (25 mu m), can be successfully ignited in kerosene gel spray flame. Thus, it can be concluded that the metallized kerosene gel we prepared are stable and suitable for propulsion application.