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微小重力下での温度勾配中の泡の挙動実験結果
https://jaxa.repo.nii.ac.jp/records/41091
https://jaxa.repo.nii.ac.jp/records/41091589cc982-be5e-46d6-b12a-d12009d49d20
名前 / ファイル | ライセンス | アクション |
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04116017.pdf (254.1 kB)
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Item type | テクニカルレポート / Technical Report(1) | |||||
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公開日 | 2015-03-26 | |||||
タイトル | ||||||
タイトル | 微小重力下での温度勾配中の泡の挙動実験結果 | |||||
言語 | ||||||
言語 | jpn | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 微小重力 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 温度勾配 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 温度依存性 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 泡 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 移動速度 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | マランゴニ数依存性 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 高温壁 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 泡生成 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 相互作用 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | マランゴニ対流 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 電荷 | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | microgravity | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | temperature gradient | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | temperature dependence | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | bubble | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | moving speed | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Marangoni number dependence | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | hot wall | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | bubble generation | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | interaction | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Marangoni convection | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | electric charge | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_18gh | |||||
資源タイプ | technical report | |||||
その他のタイトル(英) | ||||||
その他のタイトル | Experimental results on behavior of bubbles in temperature gradient under microgravity | |||||
著者 |
東, 久雄
× 東, 久雄× 吉原, 正一× 大西, 充× 荻原, 裟千男× Azuma, Hisao× Yoshihara, Shoichi× Onishi, Mitsuru× Ogihara, Sachio |
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著者所属 | ||||||
航空宇宙技術研究所 | ||||||
著者所属 | ||||||
航空宇宙技術研究所 | ||||||
著者所属 | ||||||
航空宇宙技術研究所 | ||||||
著者所属 | ||||||
航空宇宙技術研究所 | ||||||
著者所属(英) | ||||||
en | ||||||
National Aerospace Laboratory | ||||||
著者所属(英) | ||||||
en | ||||||
National Aerospace Laboratory | ||||||
著者所属(英) | ||||||
en | ||||||
National Aerospace Laboratory | ||||||
著者所属(英) | ||||||
en | ||||||
National Aerospace Laboratory | ||||||
出版者 | ||||||
出版者 | 宇宙開発事業団 | |||||
出版者(英) | ||||||
出版者 | National Space Development Agency of Japan (NASDA) | |||||
書誌情報 |
宇宙開発事業団技術報告 en : NASDA Technical Memorandum p. 803-808, 発行日 1994-10-20 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | 微小重力下での泡の挙動を理解するため、スペースシャトル内でシリコンオイル中に注射器により泡を注入し、マランゴニ数Maの広い範囲0<<Ma<1500において泡の移動速度を観察した。容器壁は加熱され、容器壁の近傍で最大約20度C/mの温度勾配が形成された。実験の結果、次の3つの注目すべき泡挙動が観察された。(1)注射針の先からは、多数の小さな泡が形成される。(2)全ての泡は形成されるとすぐに高温壁の方へ移動し、壁の所で留まる。(3)泡の間に相互に干渉が認められる。これら3点について検討を行い、以下の結論を得た。高温壁から比較的離れた泡が壁に付着した泡に引き付けられる現象から、付着した泡の周りのマランゴニ流により大量の熱が突然輸送され、温度場を変化させて遠方の泡に影響を与えているものと考えられる。また、マランゴニ数が大きい範囲で泡の移動速度を観察した結果、移動速度は理論値より小さかったが、これは泡間の相互干渉によるものと思われる。逆に高温壁の近くでは理論値より遥かに大きな値が得られたが、これは壁に付着した泡にそれより離れた泡が引き付けられるものと考えられる。 | |||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | In order to understand behavior of bubbles under microgravity, moving speed of bubbles injected into silicon oil by a syringe was measured for wide range of Marangoni number, Ma (0 much less than Ma less than 1,500) in the space shuttle. The container wall was heated and about 20 C/m of maximum temperature gradient was obtained near the container wall. As the experimental results, following three noticeable behaviors of bubbles were observed: (1) many small bubbles was formed from extreme point of syringe; (2) all bubbles moved to the hot wall as soon as they were formed and stayed there; and (3) interaction between bubbles was observed. Based on that bubbles which are far from the hot wall are attracted by the bubbles attached to the wall, it is estimated that large amount of heat is suddenly transported by Marangoni convection around attached bubbles, thereby temperature field is changed and bubbles far from the wall are influenced. Further, as result of measurement on moving speed of bubbles in range of large Marangoni number, the measured value is lower than theoretical one. This is considered due to interaction between bubbles. On the other hand, the measured value near the hot wall is much higher than the theoretical one. This is considered due to attracting of bubbles far from the hot wall by bubbles attached to the wall. | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1345-7888 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AN00364784 | |||||
資料番号 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 資料番号: AA0004116017 | |||||
レポート番号 | ||||||
内容記述タイプ | Other | |||||
内容記述 | レポート番号: NASDA-TMR-940002 V.2 |