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常温音速ノズルにおける非平衡流
https://jaxa.repo.nii.ac.jp/records/37424
https://jaxa.repo.nii.ac.jp/records/37424ed16f794-41dc-4e15-a44d-11c5d50ce200
名前 / ファイル | ライセンス | アクション |
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nalsp0043027.pdf (378.7 kB)
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Item type | 会議発表論文 / Conference Paper(1) | |||||
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公開日 | 2015-03-26 | |||||
タイトル | ||||||
タイトル | 常温音速ノズルにおける非平衡流 | |||||
言語 | ||||||
言語 | jpn | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 気体質量流量計測 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 微量質量流量 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 高精度計測標準 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 非平衡流 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 数値シミュレーション | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 音速ノズル | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | CO2 ガス流れ | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 非粘性流 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 分子振動 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 振動温度 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 振動緩和時間 | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | gas mass flow measurement | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | very low mass flow rate | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | high accuracy measurement standard | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | non equilibrium flow | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | numerical simulation | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | sonic nozzle | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | CO2 gas flow | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | inviscid flow | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | molecular vibration | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | vibrational temperature | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | vibrational relaxation time | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_5794 | |||||
資源タイプ | conference paper | |||||
その他のタイトル(英) | ||||||
その他のタイトル | Non-equilibrium flow in the sonic nozzle at normal temperature | |||||
著者 |
横川, 彰寛
× 横川, 彰寛× 西岡, 通男× Yokokawa, Akihiro× Nishioka, Michio |
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著者所属 | ||||||
大阪府立大学 工学部 航空宇宙工学科 | ||||||
著者所属 | ||||||
大阪府立大学 工学部 航空宇宙工学科 | ||||||
著者所属(英) | ||||||
en | ||||||
Osaka Prefecture University Department of Aerospace Engineering, College of Engineering | ||||||
著者所属(英) | ||||||
en | ||||||
Osaka Prefecture University Department of Aerospace Engineering, College of Engineering | ||||||
出版者 | ||||||
出版者 | 航空宇宙技術研究所 | |||||
出版者(英) | ||||||
出版者 | National Aerospace Laboratory (NAL) | |||||
書誌情報 |
航空宇宙技術研究所特別資料 en : Special Publicationa of National Aerospace Laboratory 巻 43, p. 91-94, 発行日 1999-11 |
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会議概要(会議名, 開催地, 会期, 主催者等) | ||||||
内容記述タイプ | Other | |||||
内容記述 | 航空宇宙技術研究所 7-9 Oct. 1998 (23th). 24-26 Mar. 1999 (24th) 東京 日本 | |||||
会議概要(会議名, 開催地, 会期, 主催者等)(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | National Aerospace Laboratory 7-9 Oct. 1998 (23th). 24-26 Mar. 1999 (24th) Tokyo Japan | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | この研究は質量流量計測法としての音速ノズルに関するものである。気体流の非常に微量な質量流量の場合について、高精度の標準を設定してほしいという緊急な要望があり、計量研究所の研究者はスロート直径0.3mmの音速ノズルを用いた高精度の検定を行ってきた。臨界質量流量の検定標準に対する表式を導き、この表式の誤差はCO2以外の種々の気体について0.1%以内の誤差で正確であることを示した。CO2の場合は2〜3%であった。本研究の主目的はCO2の場合の大きな誤差の原因の解明にある。引用した大きな誤差原因に関しては、音速ノズルが非常に小さいことから、分子振動を含んだ緩和現象に注目した。非粘性ノズル流のプロセスと分子振動緩和プロセスを記述する微分方程式システムを導出した。N2とCO2の場合の解を使って、引用した誤差はCO2のみで起り、振動緩和過程がCO2の臨界質量流れにおおきな役割りを果たしていることが判明した。 | |||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | The present investigation is concerned with the problem of sonic nozzle as a means for measuring mass-flow rate. For the case of very low mass-flow rate for gas flow there is urgent demands of establishing a high accuracy standard, and researchers in National Research Laboratory of Metrology have conducted accurate calibrations for sonic nozzle with throat diameters as small as 0.3 mm. They derived an expression for the critical mass-flow rate for calibration standard and they found it very accurate within an error of 0.1 percent for various gases except CO2, for which the error is found to be from two to three percent. The main purpose of the present study is to clarify the cause of the large error for case of CO2. As for the cause of the cited large error, considering that the sonic nozzles are very small in scale, an attention is focussed on relaxation phenomena involving molecular vibration. A system of differential equations is derived for describing the inviscid nozzle flow process and the vibrational relaxation process. With obtaining the solutions for the cases of N2 and CO2 it is shown that the cited error does appear for CO2 only, indicating that the vibrational relaxation process has a great effect on the critical mass-flow for the case of CO2. | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0289-260X | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AN10097345 | |||||
資料番号 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 資料番号: AA0001960027 | |||||
レポート番号 | ||||||
内容記述タイプ | Other | |||||
内容記述 | レポート番号: NAL SP-43 |