关键词: 电弧喷射推力器;启动特性+;工作性能;实验

Abstract: To realize the startup characteristic and operating performance of low power Arcjet Thrusters in detail,extensive multi-start experimental investigation was carried out on the thrusters with different structures and various propellants.Propellant-feeding system and vacuum-simulating system were established,power-processing unit and small-thrust-measuring device were developed,experimental data collection system was prepared,thruster structure design and material selection were accomplished,and multi-start experiments of the thrusters using argon,nitrogen and ammonia as the propellants were performed successfully.Abundant experimental phenomena are observed and plentiful experimental data are obtained,and some conclusions are made by analyzing the results.The investigation shows that the propellant properties have significant effects on the startup characteristic and operating performance of Arcjet,and the thruster optimization design should be performed for given propellant,covering a wide flow rate range properly.

Key words: Arcjet thrusters;Startup characteristic~+;Operating performance;Experimentation