Arc Wind-Tunnel Flow Diagnostics by Cavity-Enhanced Absorption Spectroscopy
Arc Wind-Tunnel Flow Diagnostics by Cavity-Enhanced Absorption Spectroscopy
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DOI：
10.2514/1.39362
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发表时间：
2009-05-01
期刊：
影响因子：
2.5
通讯作者：
Arakawa, Yoshihiro
中科院分区：
文献类型：
--
作者：
Takayanagi, Hiroki;Matsui, Makoto;Arakawa, Yoshihiro
在电弧风洞中应用腔增强吸收光谱技术测量了粒子数密度和温度分布。在真空室上安装布鲁斯特窗，在放置在真空室外部的一对高反射率镜之间构造腔。因此，灵敏度提高了超过2个数量级相比，传统的单程激光吸收光谱。用腔增强吸收光谱法估算的0.2%稀释氧的温度分布与用单程激光吸收光谱法估算的氩的温度分布有很好的一致性。
Cavity-enhanced absorption spectroscopy was applied to an arc wind-tunnel How to measure the number density and the temperature distributions. With installed Brewster windows on a vacuum chamber, a cavity was constructed between a pair of high-reflectance mirrors placed outside of the chamber. Consequently, sensitivity was improved by more than 2 orders of magnitude compared with conventional single-pass laser absorption spectroscopy. The temperature distribution of 0.2% diluted oxygen estimated by cavity-enhanced absorption spectroscopy shows a good agreement with that of argon estimated by single-pass laser absorption spectroscopy.