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oai:jaxa.repo.nii.ac.jp:00004017 2023-06-21T08:49:50Z 1398:1530:1536 1543:1874:1880 1887:1891 9:789:868:877

吸収飽和誘起蛍光法による光学的に厚いプラズマ流中の温度分布計測 Temperature Measurement in Optically Thick Plasma Flows by a Laser Induced Fluorescence Combined with Laser Absorption Spectroscopy 伊藤, 彦 金子, 剛 野村, 哲史 小紫, 公也 Schonherr, Tony 小泉, 宏之 Ito, Gen Kaneko, Tsuyoshi Nomura, Satoshi Komurasaki, Kimiya Schonherr, Tony Koizumi, Hiroyuki 第45回流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2013 (2013年7月4日-5日. タワーホール船堀), 東京 45th Fluid Dynamics Conference / Aerospace Numerical Simulation Symposium 2013 (July 4-5, 2013. Tower Hall Funabori), Tokyo, Japan Laser Induced Fluorescence (LIF) method is not applicable to optically thick plasma flow because its fluorescence profile is distorted by three effects; absorption of laser, re-absorption of fluorescence and absorption saturation. In this study, LIF was combined with Laser Absorption Spectroscopy (LAS) to measure spatially resolved translational temperature in an optically thick argon plume. By utilizing absorption data of a probe laser beam through the plume, distortion of LIF profile was corrected, and accurate translational temperature was obtained. This measurement method was applied to optically thick argon plasma flow in various conditions such as changing input power and measurement points. These results show good agreement with Abel-inversed LAS, and the validation of this method was established. The translational temperature without correction was up to a fifth of corrected one. Due to distorted fluorescence profile, it is considered that measured translational temperature by LIF was overestimated. It is revealed that with increasing optical thickness of plasma, the effects of absorption and re-absorption have more impact on fluorescence profile than absorption saturation. Indeed, axial distribution of translational temperature was obtained easily and quickly. The measurement time of this method is about one tenth of that using Abel inversion. LIF combined with LAS is an effective method to obtain axial distribution of translational temperature of optically thick plasma flow made by wind tunnel facilities such that operation time is limited. 形態: カラー図版あり Physical characteristics: Original contains color illustrations 資料番号: AA0062268017 レポート番号: JAXA-SP-13-011 宇宙航空研究開発機構(JAXA) Japan Aerospace Exploration Agency (JAXA) 2014-03-31 jpn conference paper https://jaxa.repo.nii.ac.jp/records/4017 1349-113X AA11984031 宇宙航空研究開発機構特別資料: 第45回流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2013論文集 JAXA Special Publication JAXA-SP-13-011 95 98 https://jaxa.repo.nii.ac.jp/record/4017/files/62268017.pdf application/pdf 742.7 kB 2020-01-16