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首页> 外文期刊>Aerospace >Impulse and Performance Measurements of Electric Solid Propellant in a Laboratory Electrothermal Ablation-Fed Pulsed Plasma Thruster
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Impulse and Performance Measurements of Electric Solid Propellant in a Laboratory Electrothermal Ablation-Fed Pulsed Plasma Thruster

机译：实验室电热烧蚀脉冲等离子体推进器中电固体推进剂的脉冲和性能测量

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Electric solid propellants are advanced solid chemical rocket propellants that can be controlled (ignited, throttled and extinguished) through the application and removal of an electric current. This behavior may enable the propellant to be used in multimode propulsion systems utilizing the ablative pulsed plasma thruster. The performance of an electric solid propellant operating in an electrothermal ablation-fed pulsed plasma thruster was investigated using an inverted pendulum micro-newton thrust stand. The impulse bit and specific impulse of the device using the electric solid propellant were measured for short-duration test runs of 100 pulses and longer-duration runs to end-of-life, at energy levels of 5, 10, 15 and 20 J. Also, the device was operated using the current state-of-the-art ablation-fed pulsed plasma thruster propellant, polytetrafluoroethylene (PTFE). Impulse bit measurements for PTFE indicate 100 ± 20 μN-s at an initial energy level of 5 J, which increases linearly with energy by approximately 30 μN-s/J. Within the error of the experiment, measurements of the impulse bit for the electric solid propellant are identical to PTFE. Specific impulse when operating on PTFE is calculated to be about 450 s. It is demonstrated that a surface layer in the hygroscopic electric solid propellant is rapidly ablated over the first few discharges of the device, which decreases the average specific impulse relative to the traditional polytetrafluoroethylene propellant. Correcting these data by subtracting the early discharge ablation mass loss measurements yields a corrected electric solid propellant specific impulse of approximately 300 s.
机译：电动固体推进剂是先进的固体化学火箭推进剂，可以通过施加和去除电流来控制（点燃，节流和熄灭）。这种行为可以使推进剂用于利用烧蚀脉冲等离子体推进器的多模推进系统中使用。使用倒立的摆锤微牛顿推力支架研究了在电热消融滤送型脉冲推进器中操作的电固体推进剂的性能。使用电动固体推进剂的装置的脉冲位和特定脉冲被测量为100个脉冲的短持续时间测试，并且在5,10,15和20 J的能级，在寿命终端中运行的短持续时间试验。而且，使用当前最先进的消融滤送的脉冲等离子体推进器，聚四氟乙烯（PTFE）操作该装置。 PTFE的脉冲位测量值在5 j的初始能级中表示100±20μl-s，其随能量的线性增加约30μl/ j。在实验的错误中，电固体推进剂的脉冲位的测量与PTFE相同。在PTFE上操作时的具体脉冲计算为约450秒。结果证明，吸湿性电动推进剂中的表面层在装置的前几个排出中快速消融，这降低了相对于传统聚四氟乙烯推进剂的平均特异性脉冲。通过减去早期放电消融质量损失测量校正这些数据产生约300秒的校正电动固体推进剂特异性脉冲。

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