一种用于临近空间飞行器的吸气式电推进技术

针对低速临近空间飞行器提出了一种新型吸气式电推进方案，该方案采用单介质阻挡放电（SDBD）作为等离子体源，因此能在较大气压范围（数Pa~1atm）内电离大气产生等离子体并产生推力。为探究该吸气式电推进方案的推力性能，测量了实验样机在多个气压和电压条件下产生的推力。推力测量结果显示在10~90kPa气压范围内，实验样机产生的推力在10 2~10 3μN量级；气压一定时，产生的推力与驱动电压呈幂次相关；而电压一定时，随着气压自1atm逐渐降低，产生的推力先增大后减小，且达到最大推力的气压与所加驱动电压相关。

An Air-Breathing Electric Thruster for Near-Space Vehicle

An air-breathing electric thruster, which uses the Single Dielectric Barrier Discharge (SDBD) technique to generate the plasma, is proposed in this paper for near-space propulsion missions. Using the SDBD plasma source, this air-breathing electric thruster can theoretically operate in a wide range of pressure (from several Pa to 1atm). To investigate the performance of this kind of air-breathing electric thruster, a simple thruster is manufactured and the thrust it produces under different ambient pressure and applied voltage conditions are measurement. The measuring results shows that under a moderate applied voltage, when the pressure ranges from 10〖KG*9〗kPa to 90kPa, the thrust is on the order of 10 2~10 3μN. At a certain pressure, the power law correlation is found between the thrust and the applied voltage. With a constant voltage, the thrust increases first to a maximum and then decreases with the gradual decrease of pressure, and the pressure at which the maximum thrust is obtained is a function of the applied voltage.