Electrothermal-Chemical Ignition Research on 120-mm Gun in Korea
Electrothermal-Chemical Ignition Research on 120-mm Gun in Korea
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DOI：
10.1109/tmag.2008.2008415
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发表时间：
2009
影响因子：
2.1
通讯作者：
Seong Ho Kim;Kyung Seung Yang;Young Hyun Lee;Jin Sung Kim;Byung Ha Lee
中科院分区：
文献类型：
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作者：
Seong Ho Kim;Kyung Seung Yang;Young Hyun Lee;Jin Sung Kim;Byung Ha Lee
控制燃烧过程的电热化学（ETC）推进需要大量电能才能产生明显的效果。针对ETC研究集中于早期点火阶段的变化趋势，韩国国防发展局（ADD）一直在研究使用毛细管等离子体喷射器的120毫米火炮电热点火。在毛细管几何形状有限的情况下，已经完成了使用各种衬里材料的设计工作，以实现能够传输大约 100 kJ 能量的强大毛细管放电。借助等离子体理论估计电特性并与实验结果进行比较。已经使用密闭容器和枪室模拟器进行了实验，分别研究燃烧行为和电热点火的早期阶段。该密闭容器设计用于等离子体和传统点火。燃烧速率可达70 MPa。枪膛模拟器的设计采用 120 毫米火炮的膛室形状，但丙烯酸膛室壁可承受高达 30 MPa 的压力。通过先前使用封闭容器和枪室模拟器的测试，已经选择了适当的电能和推进剂。全尺寸 120 毫米火炮使用 JA2 推进剂进行发射。施加持续时间为 1-2.5 毫秒、能量为 20 至 120 kJ 的电脉冲。除了点火能力之外，结果还表明可以控制峰值压力。目前，韩国ADD继续开展研究，以提高等离子体喷射器的效率，压缩脉冲形成网络，并研究LOVA推进剂的电热点火特性。
Electrothermal-chemical (ETC) propulsion with the control of a combustion process yet requires large electrical energies for an appreciable effect. Referring to the changed tendency of focusing ETC researches on the early ignition phase, the Agency for Defense Development (ADD), Korea, has been studying an electrothermal ignition for a 120-mm gun using a capillary plasma injector. Under the condition of a limited capillary geometry, design efforts with various liner materials have been done to achieve robust capillary discharges capable of transferring energies around 100 kJ. Electrical properties were estimated with the help of plasma theories and compared with experimental results. Experiments using a closed vessel and a gun-chamber simulator have been done to investigate the burning behaviors and the early phase of an electrothermal ignition, respectively. The closed vessel was designed for both a plasma and a conventional ignition. The burning rates could be obtained up to 70 MPa. The gun-chamber simulator was designed in the shape of the chamber of a 120-mm gun except for an acrylic chamber wall withstanding up to 30 MPa. Through prior tests using the closed vessel and the gun-chamber simulator, appropriate electrical energies and propellant have been selected. Firings of the full-scale 120-mm gun have been done using JA2 propellant. Electrical pulses of 1-2.5-ms duration in the energy from 20 to 120 kJ were applied. Aside from ignition capability, the results showed a possibility of a control on the peak pressure. Currently, ADD, Korea, continues the research to enhance the efficiency of the plasma injector, to compact the pulse forming network, and to investigate the electrothermal ignition properties of LOVA propellant.