关键词: 阳极结构;电弧加热发动机;性能;稳定性

Abstract: The instability of arcjet under low power and flow rate leads to the decrease of performance.Using nitrogen as propellant,experiments under different conditions are compared between the new and old anode structure.For the old arcjet,thrust and impulse are low at low power,thermal efficiency is reduced at low mass flux.While for the new arcjet,it is clear that arc voltage,thrust,specific impulse,efficiency and stability are all improved remarkably.So the improvement of anode structure can control the place of the arc anode attachment,which has the effect on the low power arcjet.

Key words: Anode structure;Arcjet;Performance;Stability