| 不同约束下激光推进流场波系结构实验研究 |
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| 引用本文： | 文明,洪延姬,叶继飞,王广宁,崔村燕.不同约束下激光推进流场波系结构实验研究[J].光电子．激光,2007,18(9):1104-1107. |
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| 作者姓名： | 文明 洪延姬 叶继飞 王广宁 崔村燕 |
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| 作者单位： | 装备指挥技术学院研究生院,北京,101416;装备指挥技术学院基础部,北京,101416 |
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| 基金项目： | 教育部跨世纪优秀人才培养计划 |
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| 摘 要： | 利用透镜聚焦CO2激光击穿空气,在有效解决实验系统时序问题的基础上,借助高速阴影系统研究了3种不同约束构形下激光推进的流场波系结构,获得了波系演化的时序照片,并初步分析了等离子体点火特性和激光支持吸收波(之后退化为激波)的传播速度.结果表明:无约束下流场约呈椭圆形扩散衰减,平面靶和15°扩张靶约束下发生明显的激波反射和边界绕射现象,3种约束中心均出现缓慢变化的低密度高压气团;3种约束下激光支持的爆轰波退化为激波时速度急剧下降,之后激波速度变化平缓,约70～80μs降至声速.
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| 关 键 词： | 激光推进 约束 流场 波系结构 点火特性 激波速度 |
| 文章编号： | 1005-0086（2007）09-1104-04 |
| 修稿时间： | 2006-12-30 |
Experimental Investigation on Wave Structures of Laser propulsion Flow Field Under Different Constraint Conditions |
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| WEN Ming,HONG Yan-ji,YE Ji-fei,WANG Guang-yu,CUI Cun-yan.Experimental Investigation on Wave Structures of Laser propulsion Flow Field Under Different Constraint Conditions[J].Journal of Optoelectronics·laser,2007,18(9):1104-1107. |
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| Authors: | WEN Ming HONG Yan-ji YE Ji-fei WANG Guang-yu CUI Cun-yan |
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| Affiliation: | WEN Ming1,HONG Yan-ji2,YE Ji-fei2,WANG Guang-yu2,CUI Cun-yan2(1.Graduate School of Academy of Equipment Comm, & Technology,Beijing 101416,China,2.Department of Basic Science,Academy of Equipment Comm, & Technology,China) |
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| Abstract: | A lens was used to focalize CO2 laser and breakdown air.After the sequential problem of experimental system was solved effectively,wave strctures of laser propulsion flow field under three different constraint conditions were studied with a high-speed shadowing system.Sequential photos of wave evolvement were obtained.The ignition characteristics of laser plasma and the expanding velocity of laser-supported absorption wave (evolved into blast wave) were analyzed primarily.The results indicated that the flow... |
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| Keywords: | laser propulsion constraint flow field wave structure ignition characteristics blast wave velocity |
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