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摘要微推力器是微纳卫星姿态控制、轨道保持和机动的重要元件。微纳卫星的快速发展，对微推进系统提出了很高的要求。在目前主流研究方向的激光烧蚀推进中，液体激光烧蚀推进由于液体靶材的无污染，高比冲，脉冲质量可控性而具有极大的发展前景。本文开展了液体激光烧蚀微推进器所使用的液体燃料研究。分析了液体推进技术常用的几种液体靶材特点，选择一种液体靶材测试了其毛细效应性能，初步设计了液体激光烧蚀微推进器的实验装置。实验结果显示：内径为1mm的毛细管最适用于空间环境，过大则不宜密封，过小则输送能力较弱。本文还针对水靶的推进性能进行了初步研究，目前得出液体靶材水靶室的冲量为1.35μN·s，冲量耦合系数为71µN/W。结论对以后液体激光烧蚀微推进实验样机设计制造有着指导意义51307
关键词 激光烧蚀 微推进 液体 比冲
毕业设计说明书外文摘要
Title Study on micro thruster performance of droplet laser ablation
Abstract
Micro thruster can be used in micro satellite attitude control and orbit maneuver and maintain. As the rapid development of the micro- and nano-satellite, the micro propulsion system need to have a higher performance. Because the liquid target of no pollution, high specific impulse, quality controllable pulse，the liquid target has tremendous potential in laser ablation propulsion development. In this paper, the liquid fuel used in the liquid laser ablation of micro thruster was studied. Several commonly used liquid target characteristics of liquid propulsion technology were anylised. A liquid propellants was chosen in the test of the performance of capillary effect. An preliminary design of the experimental device of liquid laser ablation of micro thruster was set up. The experimental results showed that the inner diameter of 1 mm capillary is the most suitable for the space environment. Too large of the inner glass tube diameter is not suitable for sealing. Too small, the transport capacity is weak. In this paper, a preliminary study on the performance of the water target was carried out. At present, the liquid water target chamber for impulse impulse coupling coefficient for 71µN/W. These results can guide the design and manufacture of laser ablation micro propulsion system
Keywords Laser ablation micro propulsion liquid specific impulse
目 次
1 绪论
1.1 论文研究的背景及意义 1
1.2.1 常见推进剂种类 1
1.2.1.1 固体推进剂 1
1.2.1.2 气体推进剂 1
1.2.1.3 液体推进剂 1
1.2.2 液体激光烧蚀推进现状 1
1.3 本文主要研究内容 3
2 高精度微推力测试方法研究 5
2.1 常规微推力测试方法 5
2.2 扭摆式微推力测试系统介绍 5
2.3 校准 8
2.4 测试系统与推进器的连接 8
2.5 本章小结 9
3 液体靶材输送装置设计与研究 10
3.1 液体靶材输送方式综述