激光烧蚀掺杂金属粉工质的推进性能
Polymer seeded with metallic powders in ablation mode laser propulsion
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摘要: 为结合金属高比冲和聚合物工质高冲量耦合系数的优点，为激光推进光船优选工质，对掺入金属粉末的聚甲醛(POM)工质在CO2激光辐照下的推进性能开展了实验研究。结果表明：在一定的条件下金属粉末能提高工质的推进性能。掺入微米铝粉的聚甲醛工质的冲量耦合系数最大值由12×-5 N/W提高到21.72×10-5 N/W，在直筒结构的约束下，最高冲量耦合系数和比冲分别提高到61.64×-5 N/W和727.32 s，能量利用率超过了100%，表明工质参与了化学反应。Abstract: In order to improve polymer’s propulsion Performance, polyformaldehydes(POM) seeded with metallic powders have been researched with a CO2 laser.The results show that metallic powders can improve POM’s propulsion performance under proper condition. The largest momentum coupling coefficient of POM rises from 12×10-5 N/W to 21.72×10-5 N/W after added with micron aluminium powders. When the POM seeded with micron aluminium powders is put into a long cylindrical model, the largest momentum coupling coefficient and specific impulse rise to 61.64×10-5 N/W and 727.32 s, respectively. The corresponding energy usage ratio is over 100%. This indicates that the target has reacted with air．
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Key words:
- laser propulsion /
- ablation mode /
- polyformaldehyde /
- co2 laser /
- metallic powder
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