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首页> 外文期刊>Propellants, Explosives, Pyrotechnics >Direct Measurement of Radiative Flux Incident upon Propellant during Plasma Propellant Interactions
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Direct Measurement of Radiative Flux Incident upon Propellant during Plasma Propellant Interactions

机译：在等离子体推进剂相互作用期间直接测量推进剂的辐射通量事件

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This paper sets out to describe some of the experimental work performed at QinetiQ, exploring the potential of electrothermal-chemical (ETC) gun technology. Work performed primarily by the Fraunhofer-Institut fur Chemische Technologie (ICT) and supported by Technologiezentrum Nord (TZN), both in Germany, has been repeated and extended. Their work, which used aluminium plasma initiation wires, showed internal damage was being done to the structure of propellant grains with translucent (but not opaque) propellant formulations, both in exploding wire-in-air and in exploding wire closed vessel tests. This damage was shown to increase the gas generation rate in closed vessel tests. That work demonstrated the potential to use ETC plasma to alter the gas gneration rate during combustion. If this could be achieved, then the piezometric efficiency of a gun system could be increased. The radiative energy from the plasma was assumed by ICT to be responsible for the damage sustained to the translucent propellant. However, no measurement of the incident radiation was made. Measurements of the incident radiative flux made at QinetiQ appear to indicate that there is no correlation between that radiation and the damage. Rather, the effect (in exploding wire-in-air test) seems to be more associated with the type of material used for the plasma initiation wire. Aluminium produced a significantly greater effect than copper. Further tests conducted by QinetiQ explored the use of capillary plasma generator (CPG) to produce the type of damage seen in some of the wire-in-air tests. No damage was observed to occur, although only copper plasma initiation wires were used in the CPG. Unsurprisingly then, no enhancement was found to occur in closed vessel tests with a CPG and plasma initiation wire made from copper.
机译：本文着手描述在QinetiQ进行的一些实验工作，探索电热化学（ETC）喷枪技术的潜力。重复和扩展了德国弗劳恩霍夫化学技术研究所（ICT）进行的主要工作，并得到了北德意志技术协会（TZN）的支持。他们的研究使用了铝等离子引爆线，显示了在空中爆炸和在密闭容器爆炸试验中，具有半透明（但不是不透明）推进剂配方的推进剂颗粒的内部受到破坏。在密闭容器试验中，这种损坏被证明会增加气体产生速率。该工作证明了在燃烧过程中使用ETC等离子体改变气体燃烧速率的潜力。如果能够做到这一点，那么可以提高喷枪系统的测压效率。 ICT假定等离子体产生的辐射能是造成半透明推进剂遭受破坏的原因。但是，没有测量入射辐射。在QinetiQ进行的入射辐射通量的测量似乎表明该辐射与损伤之间没有相关性。相反，效果（在空中爆炸试验中）似乎与用于等离子体引发焊丝的材料类型更为相关。铝产生的作用明显大于铜。 QinetiQ进行的进一步测试探索了毛细管等离子体发生器（CPG）的使用，以产生某些在线测试中看到的损坏类型。尽管在CPG中仅使用了铜等离子体引发线，但未观察到损坏发生。因此，毫不奇怪，在封闭的容器测试中，使用CPG和铜制等离子引发线不会发现增强作用。

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