著者

髙橋 政浩 富岡 定毅 Takahashi Masahiro Tomioka Sadatake

出版者

宇宙航空研究開発機構(JAXA)

雑誌

宇宙航空研究開発機構特別資料: 第51回流体力学講演会/第37回航空宇宙数値シミュレーション技術シンポジウム論文集 = JAXA Special Publication: Proceedings of the 51st Fluid Dynamics Conference / the 37th Aerospace Numerical Simulation Symposium (ISSN:24332232)

巻号頁・発行日

vol.JAXA-SP-19-007, pp.157-164, 2020-02-04

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第51回流体力学講演会/第37回航空宇宙数値シミュレーション技術シンポジウム (2019年7月1日-3日. 早稲田大学早稲田キャンパス国際会議場), 新宿区, 東京

著者

中谷 辰爾 野村 俊貴 引地 悠太 田中 信太郎 崔 敏鎬 今村 宰 津江 光洋 富岡 定毅

出版者

一般社団法人 日本航空宇宙学会

雑誌

日本航空宇宙学会論文集 (ISSN:13446460)

巻号頁・発行日

vol.61, no.6, pp.151-158, 2013 (Released:2014-06-27)

参考文献数

38

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Experiments on the effects of thermally cracked components of n-dodecane on the ignition and the combustion performance of a scram jet model combustor at Mach 2 were performed. Gaseous components of the thermally cracked n-dodecane at various temperature and 1MPa were measured by a gas chromatograph. Surrogate mixtures including hydrogen, methane, ethane and ethylene were injected into the supersonic air stream in the model combustor, and ignition and combustion behaviors were investigated at total temperatures of 1800 to 2400K. Pressure measurements on the combustor wall and optical observations of combustion using a high speed video camera were conducted. Results indicated that three combustion modes of intensive, transient and weak combustions were observed. Ignition was observed in the boundary layer positioned at the downstream of the cavity, and the flame propagated upward to the cavity. The ignition performance of ethylene was superior to methane and ethane, and their performances were elucidated from the reactivities predicted by a 0-dimensional calculation of chemical reactions for stoichiometric mixtures. An increase in the methane concentration reduced the ignition performance, and an increase in ethylene enhanced the ignition and combustion.

著者

小室 智幸 高木 翔平 高橋 政浩 富岡 定毅 佐藤 和雄 伊藤 勝宏 Komuro Tomoyuki Takagi Shohei Takahashi Masahiro Tomioka Sadatake Sato Kazuo Ito Katsuhiro

出版者

宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)

雑誌

平成24年度宇宙輸送シンポジウム: 講演集録 = Proceedings of Space Transportation Symposium: FY2012

巻号頁・発行日

2013-01

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平成24年度宇宙輸送シンポジウム (2013年1月17日-1月18日. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)), 相模原市, 神奈川県

著者

高木 翔平 富岡 定毅 工藤 賢司 村上 淳郎 升谷 五郎 Takagi Shohei Tomioka Sadatake Kudo Kenji Murakami Atsuo Masuya Goro

出版者

宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)

雑誌

平成24年度宇宙輸送シンポジウム: 講演集録 = Proceedings of Space Transportation Symposium: FY2012

巻号頁・発行日

pp.1-8, 2013-01

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平成24年度宇宙輸送シンポジウム (2013年1月17日-1月18日. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS)), 相模原市, 神奈川県

著者

谷 香一郎 富岡 定毅 植田 修一 齋藤 俊仁 加藤 周徳 高崎 浩一 吉田 誠 Tani Kouichiro Tomioka Sadatake Ueda Syuichi Saito Toshihito Kato Kanenori Takasaki Kouichi Yoshida Makoto

出版者

宇宙航空研究開発機構(JAXA)

雑誌

宇宙航空研究開発機構特別資料: 第91回風洞研究会議論文集 = JAXA Special Publication (ISSN:1349113X)

巻号頁・発行日

vol.JAXA-SP-15-014, pp.24-29, 2016-03-01

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第91回風洞研究会議 (2015年5月21日-22日)

著者

河内 俊憲 三谷 徹 平岩 徹夫 富岡 定毅 升谷 五郎

出版者

一般社団法人 日本航空宇宙学会

雑誌

日本航空宇宙学会論文集 (ISSN:13446460)

巻号頁・発行日

vol.51, no.595, pp.403-411, 2003 (Released:2003-09-26)

参考文献数

15

被引用文献数

2 6

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A one-dimensional theoretical method for an evaluation of the net thrust of a scramjet engine is presented. To calculate the thrust performance of the engine analytically, an efficiency characterizing compression process, such as recovery factor in total pressure or kinetic energy efficiency etc., is necessary. In the previous theoretical method, this efficiency was roughly assumed. Although the effect of aerodynamic parameters and configuration parameters on the thrust can be investigated with this rough assumption, the net thrust evaluated with this method was not enough accurate to be compared with the measured thrust in experiments. The total pressure loss is chosen as the efficiency in this paper. This total pressure loss is evaluated from the engine internal drag with the wind tunnel experiment, which is due to irreversible process through the engines. The theoretical maximum thrust of the engines can be calculated with this new method.

著者

神永 晋 富岡 定毅 山岬 裕之

出版者

一般社団法人 日本航空宇宙学会

雑誌

日本航空宇宙学会論文集 (ISSN:13446460)

巻号頁・発行日

vol.53, no.623, pp.554-561, 2005 (Released:2006-01-06)

参考文献数

16

被引用文献数

1

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Flow behavior and thrust performance of MHD energy bypass scramjet engine was examined numerically. MHD generator was placed at the isolator to enhance the flow compression. Kinetic energy was converted to electrical energy in the MHD generator. Extracted electrical energy was consumed at the MHD accelerator placed at the downstream of the combustor. When MHD energy bypass system was used, the flow was decelerated and compressed in the MHD generator. Effect of velocity and Mach number on wall friction was analyzed and decrease of friction force was pointed out. Also, high pressure in the combustor resulted in increase of pressure contribution to net thrust. Despite of positive effects, decelerating Lorentz force in the MHD generator was comparably large and no significant difference in net thrust performance is observed.