掺杂金属颗粒的高分子工质激光推进实验研究
Experimental study of laser propulsion by using polymer propellant doped with metal powders
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摘要: 利用大功率脉冲TEA-CO2激光器作为光源，对不同元素、浓度以及颗粒直径金属掺入PVC的靶材进行了测试。结果发现，不同元素种类以及不同颗粒直径的金属掺杂后的PVC靶材的冲量耦合系数变化不大，但在不同功率密度处，比冲均有显著提高，其中纳米Fe粉性能最为优异。在功率密度为5×106 W/cm2处，50%纳米Fe粉质量分数的靶材的比冲出现最大值。在大气环境下，对于掺有20%纳米Zn粉质量分数的PVC靶材，其冲量耦合系数随激光功率密度的提高而先升后降，比冲并不优异于比其熔点更高的Fe粉和Ni粉掺杂。Abstract: The metal particles of different elements, concentrations and diameters are doped in PVC and the targets are tested by using a high-power pulsed TEA-CO2 laser. The results show that: the coupling coefficient changes slightly with elements and diameters of metal particles doped in PVC, but the specific impulse is significantly improved for different laser power densities. The doped nano-Fe powder PVC shows the best performance; the maximum specific impulse appears at 50% nano-Fe power concentration for the energy density of 5×106 W/cm2. At the atmospheric environment, the coupling coefficient for PVC target containing 20% nano-zinc powder increases first and then decreases with the increase of laser power density, and the specific impulse is not even better than that for PVC targets doped
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Key words:
- laser propulsion /
- propellant /
- specific impulse /
- pvc
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