著者

和栗 雄太郎 藤井 勝 網谷 竜夫 恒屋 礼二郎

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 (ISSN:00290270)

巻号頁・発行日

vol.25, no.156, pp.820-826, 1959-08-25 (Released:2008-03-28)

参考文献数

3

被引用文献数

25 54

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Regarding the penetrating distance of fuel spray of Diesel engine, the old theory dealing with the motion of a fuel droplet in still air is recognized not to coincide with the actual phenomenon because of extremely small size of atomized fuel droplets and very high density of gas in cylinder. In this paper, the characteristics of spray penetration are discussed from the viewpoint of momentum theory based on the idea that air induced into fuel jet stream makes a kind of mixed gas together with fuel droplets. As the results of a series of experiments, the following conclusions have been reached : (1) Theory of momentum for the spray penetration holds good, and effects of elements which control the penetrating distance can be expressed by relatively simple relations consisting of non-dimensional numbers. (2) The distance of spray penetration is proportional to square roots of each of nozzle orifice diameter, injection velocity and time after injection begins, and also is influenced by density of gas in cylinder, but the effect of viscosity of gas on the penetrating distance which remained uncertain is very little. (3) Excess air coefficient of spray mixture increases in proportion to penetrating distance, and the ratio between cylinder bore and such a penetrating distance that excess air coefficient becomes one (1) gives a base of similarity of fuel spray distribution in cylinder. In the design, accordingly, nozzle orifice diameter may be determined only in proportion to cylinder bore.

著者

恒屋 礼二郎 堤 満康

雑誌

長崎総合科学大学紀要 = The Bulletin of Nagasaki Institute of Applied Science

巻号頁・発行日

vol.41, no.2, pp.279-293, 2001-03

著者

恒屋 礼二郎 堤 満康 仲尾 晋一郎

雑誌

長崎総合科学大学紀要 = The Bulletin of Nagasaki Institute of Applied Science

巻号頁・発行日

vol.42, no.1・2合併, pp.57-75, 2001-12-20

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Based on the studying and manufacturing of the NIAS G-1 glider reported in the former paper, the NIAS G-3 to G-5 gliders were newly designed and manufactured by the students, then the G-5 glider participated in the 22nd Birdman Rally Contest. Before designing these gliders, a few kinds of studies were carried out such as comparative flight tests of the delta wing typed, swept wing typed and ordinary wing typed gliders as well as wind tunnel tests of some kinds of wing sections. This paper deals with the details of the studies mentioned above and reports the results of the Birdman Rally Contest.

著者

恒屋 礼二郎 堤 満康 仲尾 晋一郎

出版者

長崎総合科学大学図書刊行委員会

雑誌

長崎総合科学大学紀要 (ISSN:0387527X)

巻号頁・発行日

vol.42, no.1, pp.57-75, 2001-12

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Based on the studying and manufacturing of the NIAS G-1 glider reported in the former paper, the NIAS G-3 to G-5 gliders were newly designed and manufactured by the students, then the G-5 glider participated in the 22nd Birdman Rally Contest. Before designing these gliders, a few kinds of studies were carried out such as comparative flight tests of the delta wing typed, swept wing typed and ordinary wing typed gliders as well as wind tunnel tests of some kinds of wing sections. This paper deals with the details of the studies mentioned above and reports the results of the Birdman Rally Contest.

著者

表原 功 恒屋 礼二郎

出版者

養賢堂

雑誌

エンジンテクノロジーレビュー (ISSN:18841961)

巻号頁・発行日

vol.1, no.2, pp.90-103, 2009-06