Electron Density Measurements Behind Strong Shock Waves by H-ß Profile Matching
Electron Density Measurements Behind Strong Shock Waves by H-ß Profile Matching
复制标题
通过 H-ß 轮廓匹配测量强冲击波背后的电子密度
DOI：
10.2514/2.6753
复制
发表时间：
2003
影响因子：
2.1
通讯作者：
H. Otsu
中科院分区：
文献类型：
--
作者：
K. Fujita;S. Sato;T. Abe;H. Otsu
使用氮气作为测试气体，在自由活塞双隔膜激波管中进行发射光谱，以测量强激波背后的电子密度。冲击波后面的时间冻结光谱由图像增强电荷耦合器件相机拍摄，门宽为 100 ns。激光纹影诊断用于检测冲击波的到来，并将观测到的光谱与距冲击波前沿的距离准确地关联起来。电子密度是通过线轮廓匹配技术、利用斯塔克效应加宽的H-线来测量的。使用该测量系统，在 12 km/s 的冲击速度下获得了 §0:6 mm 的高空间分辨率的电子密度分布。实验结果表明，特别是在高激波速度下，测量到的激波前沿后面的电子密度比广泛使用的热和化学非平衡模型预测的增加得更快。指出了高冲击速度下传统电离模型的几个缺点。
Emission spectroscopy was performed in a free-piston double-diaphragm shock tube to measure the electron density behind a strong shock wave, using nitrogen as the test gas. Time-frozen spectra from behind the shock wave were taken by an image-intensie ed charge-coupled device camera with a gate width of 100 ns. The laser schlieren diagnostics was used to detect the shock arrival and to correlate observed spectra with the distance from theshock front accurately. Theelectron density wasmeasured by meansof a lineproe le matching technique, using the H-¯ line broadened by the Stark effect. Using this measurement system, the electron density distribution was obtained with a high spatial resolution of §0:6 mm at a shock velocity of 12 km/s. Experimental results show that, especially at high shock velocities, the measured electron density increases more quickly behind the shock front than predicted by the thermal and chemical nonequilibrium models widely used. Several drawbacks in the conventional ionization model at high shock velocities are pointed out.
强冲击波后N2旋转弛豫的实验研究
DOI：
--
发表时间：
2008
期刊：
影响因子：
--
作者：
Yamada;G.
通讯作者：
G.
超轨道再入飞行中产生的强冲击波背后的非平衡现象
DOI：
--
发表时间：
2004
期刊：
Journal of Thermophysics and Heat Transfer 3・18
影响因子：
--
作者：
Atsushi Matsuda;Kazuhisa Fujita;Shunichi Sato;Takashi Abe
通讯作者：
Takashi Abe