LHT-100自励磁霍尔推力器热特性测试和热真空实验研究

Experimental Study of Thermal Characteristics and Thermal Vacuum of LHT-100 Self-Excited Hall Thruster

为了验证LHT-100自励磁霍尔推力器工作状态的热特性和空间环境适应性,对霍尔推力器进行了工作状态热特性测试和热真空实验研究,给出了LHT-100霍尔推力器在工作状态下关键部位的温度升高和自然降温规律,分析了自励磁霍尔推力器在常温下启动达到热平衡过程中的推力、比冲、放电损耗等随时间的变化规律,并在带过渡板情况下开展了霍尔推力器的热真空环境实验。实验结果表明:LHT-100自励磁霍尔推力器在工作近3.5h内达到热平衡,关机5h后霍尔推力器整体温度自然降至室温,在常温下启动达到热平衡过程中霍尔推力器的放电电流、推力、比冲、放电损耗等指标在正常范围内,霍尔推力器在热真空环境中启动和工作正常,霍尔推力器零部件及其材料对高低温变化环境的稳定性和适应性较好,能够适应高低温变化的环境影响。

In order to verify the thermal characteristics and space atmosphere adaptability of LHT-100 self- excited Hall thruster, thermal test and thermal vacuum experiment were carried out. The temperature of key parts and natural cooling process of LHT- 100 Hall thruster were presented. The law of thrust, specific impulse, discharge loss versus time of LHT- 100 Hall thruster is analyzed when it starts up and reaches thermal equilibri- um at room temperature. The thermal vacuum experiment of Hall thruster with transition plate was carried out. The experiment results show that LHT-100 self-excited Hall thruster reaches thermal equilibrium at work in near 3.5 hour, and after 5 hour when the LHT- 100 Hall thruster turns off, the overall temperature can reach room temperature. The discharge current, thrust, specific impulse, discharge loss can be in appropriate range. The Hall thruster can work normally in both the high and low temperature environment. It has better stability and adaptability in both the high and low temperature environment. It also can be able to adapt to the environment im- pact of the high and low temperature variation.