关键词: 固体推进剂;推进剂添加剂;喷气火舌;微波衰减;电磁特性

Abstract: Considering the short time of propellant combustion, power ratio method is selected to be the technique for microwave attenuation measurement. Experiment results show that microwave attenuation caused by propellant exhaust plume is affected by the propellant composition. Microwave attenuation can be decreased by decreasing the amount of aluminium or partially replacing AP with nitramine (HR) in propellant while keeping constant solid ingredient, or by adding a few additives such as free-electron capturer or tailpipe burning suppressor. In doing so, the microwave attenuation can be decreased effectively while with little effect on main properties of propellant. Therefore, it can be used fov making propellant with minor microwave attenuation.

Key words: Solid propellant;Propellant additive;Plume;Microwave attenuation;Electromagnetic property