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Thrust Evaluation of an Arcjet Thruster Using Dimethyl Ether as a Propellant*

机译:使用二甲醚作为推进剂的Arcjet推进器推力评估*

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This paper describes the performance of an arcjet thruster using dimethyl ether (DME) as a propellant. DME, an ether compound, has adequate characteristics for space propulsion systems; DME is storable in a liquid state without a high pressure or cryogenic device and requires no sophisticated temperature management. DME is gasified and liquefied simply by adjusting temperature, whereas hydrazine, a conventional propellant, requires an iridium-based particulate catalyst for its gasification. In this study, thrust of the designed kW-class DME arcjet thruster is measured with a torsional thrust stand. Thrust measurements show that thrust is increased with propellant mass flow rate, and that thrust using DME propellant is higher than when using nitrogen. The prototype DME arcjet thruster yields a specific impulse of 330 s, a thruster efficiency of 0.14, and a thrust of 0.19N at 60-mg/s DME mass flow rate at 25-A discharge current. The corresponding discharge power and specific power are 2.3 kW and 39 MJ/kg.
机译:本文介绍了使用二甲醚(DME)作为推进剂的arcjet推进器的性能。 DME(一种醚化合物)具有足够的空间推进系统特性; DME可以在没有高压或低温装置的情况下以液态存储,并且不需要复杂的温度管理。 DME只需通过调节温度就可以气化和液化,而肼(一种传统的推进剂)需要使用铱基颗粒催化剂进行气化。在这项研究中,设计的kW级DME电弧喷射推进器的推力是通过扭转推力架测量的。推力测量结果表明,推力随着推进剂质量流量的增加而增加,并且使用DME推进剂的推力要高于使用氮气时的推力。原型DME arcjet推进器在25-A放电电流下在60mg / s DME质量流速下产生的比冲为330 s,推进器效率为0.14,推力为0.19N。相应的放电功率和比功率为2.3 kW和39 MJ / kg。

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