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Laser ablation characteristics of liquid energetic polymers with micro flow feed system

机译:微流量进料系统液体能量聚合物的激光消融特性

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Laser ablation micro propulsion is a novel space propulsion scheme with minimum impulse bit, high specific impulse,less pollution, simple constructer of thruster and less weight compared to other micro propulsion, with great potentialapplication on precise attitude control and orbit control of spacecraft and formation flying of micro satellites. Because ofthe splashing of the liquid working fluid drastically reducing the efficiency of laser ablation, it is essential to feed theliquid by micro flow approximately 50μg per pulse. Currently the main difficulty is the micro flow feed and ablation ofthe liquid energetic polymers. A micro flow system, utilizing piezoelectric valve controlled by pulse signal and pistoncylinder, was designed and set up to satisfy the requirement of the continuous ignition and ablation of the liquid GAP.The dynamic characteristics of ablation, impulse, plume and splashing were observed and analyzed. The ablationbehavior and splashing is detected by shadowgraphy experiments and the impulse bit is measured by torsional pendulumin vacuum. The experiment demonstrates the stability of the feed system, the jam status of the jet after the laser ablation,and the feasibility of the laser ablation propulsion using liquid energetic polymers in engineering application.
机译:激光烧蚀微型推进是一种新的空间推进方案,具有最小脉冲位,高特异性脉冲,与其他微型推进相比,污染较少,推进器的简单构造仪,重量较少,具有极大的潜力基于微卫星的精确姿态控制和轨道控制的应用。因为液体工作流体的溅穿速度降低了激光烧蚀效率,喂养了通过微流量的液体每脉冲约50μg。目前主要难度是微流量饲料和消融液体能量聚合物。一种微流量系统,利用脉冲信号和活塞控制的压电阀圆柱体设计并设置为满足连续点火和液间隙消融的要求。观察并分析了消融,脉冲,羽流和溅射的动态特征。消融通过影像造影实验检测行为和溅射,并且脉冲位通过扭转摆来测量真空。实验表明了进料系统的稳定性,激光烧蚀后喷射器的卡纸状态,激光消融推进利用液体能量聚合物在工程应用中的可行性。

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