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Other TitleTemperature Measurement in Optically Thick Plasma Flows by a Laser Induced Fluorescence Combined with Laser Absorption Spectroscopy
Author(jpn)伊藤, 彦; 金子, 剛; 野村, 哲史; 小紫, 公也; Schonherr, Tony; 小泉, 宏之
Author(eng)Ito, Gen; Kaneko, Tsuyoshi; Nomura, Satoshi; Komurasaki, Kimiya; Schonherr, Tony; Koizumi, Hiroyuki
Author Affiliation(jpn)東京大学大学院新領域創成科学研究科; 東京大学大学院新領域創成科学研究科; 宇宙航空研究開発機構航空本部空力技術研究グループ(JAXA); 東京大学大学院新領域創成科学研究科; 東京大学大学院工学系研究科; 東京大学大学院工学系研究科
Author Affiliation(eng)Graduate School of Frontier Sciences, The University of Tokyo; Graduate School of Frontier Sciences, The University of Tokyo; Aerodynamics Research Group, Institute of Aeronautical Technology, Japan Aerospace Exploration Agency (JAXA); Graduate School of Frontier Sciences, The University of Tokyo; Graduate School of Engineering, The University of Tokyo; Graduate School of Engineering, The University of Tokyo
Issue Date2014-03-31
Japan Aerospace Exploration Agency (JAXA)
Publication title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
Start page95
End page98
Publication date2014-03-31
AbstractLaser 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.
Description会議情報: 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
形態: カラー図版あり
Meeting Information: 45th Fluid Dynamics Conference / Aerospace Numerical Simulation Symposium 2013 (July 4-5, 2013. Tower Hall Funabori), Tokyo, Japan
Physical characteristics: Original contains color illustrations
Document TypeConference Paper
JAXA Category特別資料
NASA Subject CategoryInstrumentation and Photography
Report NoJAXA-SP-13-011

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