著者

新井 雅隆 天谷 賢児 長倉 邦仁

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. B編 (ISSN:03875016)

巻号頁・発行日

vol.64, no.622, pp.1925-1931, 1998-06-25

被引用文献数

2

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Laser induced fluorescence method was applied for the measurement of NO concentration in the propane and methane diffusion flames. A tunable, narrow band ArF excimer laser was used to excite the D (υ′=0) ←X (υ″=1) band of NO molecule. Emission spectrum of the induced light by a laser beam was measured by a spectroscope. Spectrum of the induced light from the diffusion flame was compared with that of the premixed flame. Although the spectrum had only NO fluorescence components on premixed flame, a lot of strong spectrum components related to the laser induced incandescence of the soot and laser induced breakdown appeared in the spectrum from the diffusion flame. NO fluorescence component was picked out from the emission spectrum with traversing the irradiate position of laser beam in order to obtain the accurate distribution of NO fluorescence on the flame axis. In this paper this method was named as S-LIF method. A planer laser induced fluorescence (P-LIF) method was tried to measure the distribution of NO fluorescence on the flame axis. In the P-LIF method, an interference filter was used to remove the obstructive light component from the LIF image. NO fluorescence distribution measured by P-LIF method was compared with that of S-LIF method. As the result, the P-LIF image qualitatively agreed with the data of S-LIF. It was confirmed that the interference filter did not remove completely the obstructive light components.

著者

青山 拓哉 天谷 賢児 福永 明 檜山 浩國 濱田 聡美

出版者

一般社団法人 日本機械学会

雑誌

日本機械学会関東支部総会講演会講演論文集 2016.22 (ISSN:24242691)

巻号頁・発行日

pp._OS0108-1_-_OS0108-2_, 2016-03-10 (Released:2017-06-19)

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Evaporation behavior of small droplet on wafer with various film was investigated. The droplet evaporation process was categorized into two types, i.e. constant contact radius (CCR) and constant contact angle (CCA) types. In the previous research, the evaporation behavior of relatively large droplets have reported and it was confirmed that the behavior was able to predict by a simple diffusion model. In this study, the same model was applied to the small droplet. As a result, the developed model was agreed with the experimental data in the case of relatively small droplets.

著者

天谷 賢児 宝田 恭之 松村 修二 澁澤 香代 小曽根 操 宗村 正弘 根津 紀久雄 大沢 善康

出版者

一般社団法人 日本エネルギー学会

雑誌

日本エネルギー学会大会講演要旨集 (ISSN:24238317)

巻号頁・発行日

vol.21, pp.292-293, 2012

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Micro hydroelectric generation facilities with battery systems were developed for the electric power supply of the EV and micro-EV. Micro-EV was developed as single driver vehicle for the town use only. These vehicles were used for the CO_2 reduction experiments and for the enhancement of regional community power. Solar energy systems were also used for mobility of micro-EV. In this paper, the some experimental trial about the EV utilization for the community development is reported.

著者

松元 宏行 弓仲 康史 天谷 賢児

出版者

公益社団法人 日本工学教育協会

雑誌

工学教育 (ISSN:13412167)

巻号頁・発行日

vol.69, no.2, pp.2_24-2_31, 2021 (Released:2021-03-28)

参考文献数

22

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Enhancement of communication and teamwork skills are important themes in higher education. For example, the Accreditation Board for Engineering and Technology (ABET) and the Japan Accreditation Board for Engineering Education (JABEE) have adopted these skills as significant criteria in their accreditation program. They are also listed in generic skills as the significant competence of students. Gunma University’s School of Science and Technology implemented an Employability Program from 2010 as a requirement for all first-year students. Under the auspices of this program, coursework in career planning and career design are offered to enhance student abilities in these areas. This study focuses on the enhancement of communication and teamwork skills through group discussions and poster presentations based on problem surveys. Student perceptions of communication skills and teamwork were investigated through a questionnaire. Results showed that students perceived improvement in those vital skills.

著者

小竹 裕人 関 庸一 天谷 賢児 清水 宏康

出版者

一般社団法人 日本エネルギー学会

雑誌

日本エネルギー学会大会講演要旨集 第25回日本エネルギー学会大会 (ISSN:24238317)

巻号頁・発行日

pp.244-245, 2016-08-02 (Released:2017-03-01)

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Low-speed electric bus was developed for building the low-carbon society. The bus has eight wheels with in-wheel motors, and its maximum speed is 19km/h. Demonstration and social experiments were carried out in the Kiryu city in order to investigate the enhancement effect of local community. In this study, we revealed the re-vitalization effect of local community by the introduction of low-speed electric bus on the basis of a questionnaire survey.

著者

新井 雅隆 天谷 賢児 長瀧 翼 沖田 秀樹

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. B編 (ISSN:03875016)

巻号頁・発行日

vol.71, no.702, pp.737-743, 2005-02-25

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Ignition and combustion characteristics of diesel spray impinging on an inclined wall were experimentally investigated. Ignition position and appearance position of the luminous flame kernel were stereoscopically observed using a two-way fiber optical system. Flat impingement wall was fixed in a high temperature, high pressure combustion chamber. Inclined angle of the flat wall was set at 30 degees or right angle against the center axis of the injection spray. Distance from nozzle tip to the impingement point on the wall was set at 50mm. Effect of ambient temperature on ignition position was investigated. As the result, ignition positions were observed near the spray periphery in the both cases of 30 degrees and right angle impingements. However, the luminous flame appeared near the wall surface at downword side of inclined wall because the fuel rich region was formed around the downword side of spray impingement point.

著者

川口 知宏 長瀧 翼 天谷 賢児 古畑 朋彦 新井 雅隆

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. B編 (ISSN:03875016)

巻号頁・発行日

vol.72, no.717, pp.1378-1383, 2006-05-25

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Ignition and combustion characteristics of diesel spray impinging on a wall were experimentally investigated. Ignition position and appearance position of the luminous flame kernel were stereoscopically observed using a two-way fiber optical system. Flat

著者

佐藤 桂司 林田 和宏 天谷 賢児 新井 雅隆

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. B編 (ISSN:03875016)

巻号頁・発行日

vol.70, no.692, pp.1051-1057, 2004-04-25

被引用文献数

12

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In this paper, separation of laser-induced fluorescence (LIF) due to PAHs and incandescence (LII) due to soot by time-resolved measurement was demonstrated for the propane diffusion flame. Laser-induced fluorescence method for the measurement of polycyclic aromatic hydrocarbons (PAHs) in diffusion flame was developed. A KrF excimer laser was used for excite the PAHs. Strong laser-induced incandescence due to soot was appeared with fluorescence signal due to PAHs. In order to separate the signals into LII and the PAHs-LIF detected from diffusion flame, time-resolved measurement was carried out. A pico-second gate CCD camera with a image intensifier was used taking a time-resolved image. From the two different images, which were taken at different time-delay, PAHs-LIF and LII were obtained. Intensity distributions of PAHs-LIF and LII were measured on the flame axis. Overlap region of the LIF and LII was observed around the onset position of the yellow flame. In this region, LIF intensity decreased and LII intensity increased along the flow direction. It seemed that this region was transition region from the PAHs to soot and was attributed the presence of soot precursor.