著者

石田 尚 善甫 啓一 上道 茜 松原 悠 埴生 孝慈 尾澤 岬 天野 千恵 榎田 翼 佐藤 翔 西浦 ミナ子 赤瀬 直子 三波 千穂美 逸村 裕 山田 信博

出版者

北海道大学 高等教育推進機構 高等教育研究部 科学技術コミュニケーション教育研究部門(CoSTEP)

雑誌

科学技術コミュニケーション (ISSN:18818390)

巻号頁・発行日

vol.11, pp.63-73, 2012-06

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In the last decade, scientists are expected to present their researches. It is symbolized as the term: "science communications" and "inter-discipline communications." We suggest and explain "Presentation Competition of Graduate Students" (PCGS). In October 2011, we, Tsukuba Graduate students' Network, conducted PCGS during a university festival and proved its effects. As results, various multi-discipline communications have been promoted among University of Tsukuba. In our university, there are few cases of the collaborated researches which leverage the opportunities that the university has almost every discipline. In this paper, we suggest PCGS as a solution of the problems and demonstrate the details about the implementation plans, strategies and results. We also inspect the impacts as evaluations with the interviews of each concerned, e.g. speaker, judge and visitor. We expect that the PCGS will be held at other universities.

著者

角谷 雄哉 佐藤 良太 秋山 茉莉花 松原 悠 藤田 佑樹 藤野 未来 善甫 啓一 田中 みさよ 上道 茜

出版者

北海道大学高等教育推進機構 高等教育研究部 科学技術コミュニケーション教育研究部門(CoSTEP)

雑誌

科学技術コミュニケーション = Japanese Journal of Science Communication (ISSN:18818390)

巻号頁・発行日

vol.16, pp.77-89, 2014-12

著者

石田 尚 善甫 啓一 上道 茜 松原 悠 埴生 孝慈 尾澤 岬 天野 千恵 榎田 翼 佐藤 翔 西浦 ミナ子 赤瀬 直子 三波 千穂美 逸村 裕 山田 信博

出版者

北海道大学高等教育推進機構 高等教育研究部 科学技術コミュニケーション教育研究部門(CoSTEP)

雑誌

科学技術コミュニケーション (ISSN:18818390)

巻号頁・発行日

no.11, pp.63-73, 2012-06

---

In the last decade, scientists are expected to present their researches. It is symbolized as the term:"science communications" and "inter-discipline communications." We suggest and explain "PresentationCompetition of Graduate Students" (PCGS). In October 2011, we, Tsukuba Graduate students’Network, conducted PCGS during a university festival and proved its effects. As results, various multidisciplinecommunications have been promoted among University of Tsukuba. In our university, thereare few cases of the collaborated researches which leverage the opportunities that the university hasalmost every discipline. In this paper, we suggest PCGS as a solution of the problems and demonstratethe details about the implementation plans, strategies and results. We also inspect the impacts asevaluations with the interviews of each concerned, e.g. speaker, judge and visitor. We expect that thePCGS will be held at other universities.

著者

新木 悠斗 上道 茜 山﨑 由大 金子 成彦

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.84, no.861, pp.17-00507-17-00507, 2018 (Released:2018-05-25)

参考文献数

8

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As a method for mining offshore gas fields, a floating production, storage and offloading (FPSO) system is attracting attention. However, sloshing in the oil-gas separator installed in FPSOs excited by sea waves is expected to cause significant difficulties. To suppress sloshing wave heights, one possibility may be to install perforated plates in a tank. In this study, a method is proposed for the accurate estimation of the first resonant wave height in the horizontal cylindrical tank with a perforated plate under pitching excitation in less time. To accomplish this purpose, the pressure loss due to the perforated plate in the open channel must be estimated accurately. Therefore, the pressure loss is modeled using steady CFD calculations considering the effects of the distribution of the flow velocity and the distribution of the inflow angle. The first order sloshing wave height is calculated in the theoretical analysis by substituting the pressure loss calculated in steady CFD. The wave heights determined using the pressure loss utilized by steady CFD are compared with the experimental value measured with a small-scale model. Using the method proposed in this study, the first resonant wave height of sloshing wave height is calculated accurately in less time.

著者

上道 茜 金築 一平 金子 成彦

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会論文集 (ISSN:21879761)

巻号頁・発行日

vol.84, no.861, pp.17-00514-17-00514, 2018 (Released:2018-05-25)

参考文献数

15

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Hydrogen combustion is attracting attentions because of zero CO2 emission. Recently, a gas turbine which uses hydrogen-rich fuel is being developed. In our previous study, we examined the influence of hydrogen-containing ratio on combustion oscillation for fuel mixtures of hydrogen and town gas (13A) experimentally. In the experiment, pressure oscillations were measured by a sensor which is installed at the bottom of the combustor. It is found that two oscillation frequencies near 200 Hz and 400 Hz were simultaneously detected in the case of hydrogen-containing fuels, whereas single oscillation frequency around 350 Hz was observed in the case of only 13A fuel. To understand this difference of oscillating frequencies, we conducted acoustic analysis using one-dimensional different diameter acoustic model. However, this simplest model could not reproduce three types of oscillating frequencies obtained by the experiment. Besides, we used an acoustic impedance of the bottom of the combustion chamber as an acoustic boundary condition. The acoustic impedance is measured experimentally under the noncombustion (cold) condition and corrected by combustion temperature obtained by equilibrium calculation. As a result of applying the corrected acoustic impedance, the three types of oscillating frequencies could be reproduced by acoustic analysis. Furthermore, to express the difference among fuel mixtures, delay times, flame positions, and the mean temperature in the chamber were calculated by the CFD simulation. Consequently, it is found that the acoustic analysis result could reproduced the difference among fuel mixtures; hydrogen makes the oscillating frequencies a little higher, because temperature becomes higher and delay time becomes shorter.

著者

羽生 宏人 和田 英一 丹羽 崇博 近藤 靖雄 川村 尚史 丸山 信也 岡村 彩乃 山科 早英良 永井 康仁 中道 達也 上道 茜 田中 成明 小林 直樹 笠原 次郎 森田 泰弘

出版者

一般社団法人 日本航空宇宙学会

雑誌

航空宇宙技術 (ISSN:18840477)

巻号頁・発行日

vol.9, pp.15-21, 2010 (Released:2010-05-14)

参考文献数

6

被引用文献数

1

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The educational hybrid-rocket was successfully launched and it also landed within the predicted area. Aerodynamic characteristics of the rocket designed by students of Tsukuba University were evaluated by the wind tunnel testing with the support of Tokai University. The flight path affected by the environmental condition, especially wind direction and velocity, was simulated with the original calculation program. The altitude of the rocket was measured with the optical equipment and the apex was 123 m although the calculation indicated 198 m. We expected that the insufficient filling or the volatilization of Nitrous oxide as an oxidizer led to this result. And then, the apex was verified with a function of the oxidizer filling ratio. The results showed that 81.2 % of the oxidizer volume in comparison with the firing test condition was accumulated in the tank at the launch.

著者

角谷 雄哉 佐藤 良太 秋山 茉莉花 松原 悠 藤田 佑樹 藤野 未来 善甫 啓一 田中 みさよ 上道 茜

出版者

北海道大学高等教育推進機構 高等教育研究部 科学技術コミュニケーション教育研究部門(CoSTEP)

雑誌

科学技術コミュニケーション (ISSN:18818390)

巻号頁・発行日

vol.16, pp.77-89, 2014-12

著者

羽生 宏人 和田 英一 丹羽 崇博 近藤 靖雄 川村 尚史 丸山 信也 岡村 彩乃 山科 早英良 永井 康仁 中道 達也 上道 茜 田中 成明 小林 直樹 笠原 次郎 森田 泰弘

出版者

THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES

雑誌

航空宇宙技術 (ISSN:18840477)

巻号頁・発行日

vol.9, pp.15-21, 2010

被引用文献数

1

---

The educational hybrid-rocket was successfully launched and it also landed within the predicted area. Aerodynamic characteristics of the rocket designed by students of Tsukuba University were evaluated by the wind tunnel testing with the support of Tokai University. The flight path affected by the environmental condition, especially wind direction and velocity, was simulated with the original calculation program. The altitude of the rocket was measured with the optical equipment and the apex was 123 m although the calculation indicated 198 m. We expected that the insufficient filling or the volatilization of Nitrous oxide as an oxidizer led to this result. And then, the apex was verified with a function of the oxidizer filling ratio. The results showed that 81.2 % of the oxidizer volume in comparison with the firing test condition was accumulated in the tank at the launch.