ENERGY ABSORPTION STRUCTURE OF LASER SUPPORTED DETONATION WAVE
ENERGY ABSORPTION STRUCTURE OF LASER SUPPORTED DETONATION WAVE
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DOI：
10.1063/1.3435428
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发表时间：
2010-05
期刊：
影响因子：
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通讯作者：
Bin Wang;Toshikazu Yamaguchi;Keigo Hatai;K. Komurasaki;Y. Arakawa
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文献类型：
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作者：
Bin Wang;Toshikazu Yamaguchi;Keigo Hatai;K. Komurasaki;Y. Arakawa
在重复脉冲（RP）激光推进中，当高能激光束在推力器中聚焦时，产生激光支撑爆轰（LSD）波。这种LSD波将激光能量转化为爆炸波的焓，然后将脉冲施加到推进器的壁上。因此，了解LSD波的能量吸收结构和维持条件是很重要的，尽管Ushio等人之前做过一些可视化实验，但仍不清楚这一点。本文采用2波长马赫-曾德尔干涉法研究了LSD区域的电子密度分布。同时，通过发射光谱实验测量了激光诱导等离子体的温度，并基于局部热平衡假设进行了计算。结果表明，在LSD中，电子密度在激波后有一个峰值（高达2×1024[m−3]）。被照射的激光在到达这个峰的位置之前可以被完全吸收。为…
In Repetitive Pulsed (RP) laser propulsion, when the high energy laser beam is focused in the thruster, Laser Supported Detonation (LSD) wave is generated. This LSD wave converts the laser energy to the enthalpy of the blast wave, which will then apply impulse to the wall of the thruster. Therefore, the energy absorption structure and sustaining condition of LSD wave are important to be understood, which was still not clear though some visualized experiments have been conducted by Ushio et al. before. In this paper, 2‐wavelength Mach‐Zehnder interferometry is brought to investigate the electron density distribution of LSD area. At the same time, the temperature of the laser induced plasma is measured by an emission spectroscopy experiment, and calculated based on the assumption of local thermal equilibrium. The results show that in LSD, the electron density has a peak (as high as 2×1024[m−3]) behind the shock wave. The irradiated laser can be entirely absorbed before reaching the position of this peak. As...