| 摘要: |
| 利用所建流场信息与推力信号同步采集的实验系统,开展了水烧蚀激光推进性能实验研究。研究发现,实验中随机出现两种特征差别明显的现象,即水烧蚀和水诱导的空气击穿。对两种现象获得的气蚀空穴发展、推力特征、冲量耦合系数、比冲和能量利用率进行了分析。结果表明,与水诱导空气击穿相比,水烧蚀获得的气蚀空穴发展较快、推力幅值、冲量耦合系数和能量利用率都高约10倍,比冲比较接近。研究结果对于水烧蚀激光推进的发展有重要意义。 |
| 关键词: 激光推进 烧蚀 击穿 推进性能 |
| DOI： |
| 分类号:V439 |
| 基金项目:国家“九七三”项目(61328);国家自然科学基金项目(10672184) |
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| Primary analysis for performance of laser propulsion with water propellant |
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CUI Cun-yan1,2, HONG Yan-ji2, WEN Ming2, HE Guo-qiang1
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1.Coll. of Astronautics,Northwestern Polytechnical Univ.,Xi’an 710072,China;2.Academy of Equipment Command and Technology,Beijing 101416,China
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| Abstract: |
| Experimental study on performance of laser-generated ablation propulsion is carried out with a set of system with which information of both flux-field and thrust loading can be gathered at the same time. Two phenomenons with obvious different characters are observed,which are water ablation and laser-induced air-breakdown with water as an induction. Developing speed is faster with water ablation than that with air-breakdown. Amplitude of thrust curve,impulse coupling coefficient and rate of energy conversion are about 10 times higher gained by water ablation compared with those obtained by air-breakdown. But special impulse of both phenomenons is close to the same value. The results are valuable for development of laser-induced ablation propulsion with water propellant. |
| Key words: Laser propulsion Ablation Breakdown Propulsion performance |
