著者

渡邉 力夫 林 浩平 岩尾 正樹 井河 恵大 冨田 信之

出版者

一般社団法人 日本航空宇宙学会

雑誌

宇宙技術 (ISSN:13473832)

巻号頁・発行日

vol.7, pp.45-52, 2008 (Released:2008-10-11)

参考文献数

9

---

When liquid nitrogen and heated water are mixed in a chamber, pressure increase due to evaporation expansion inside the chamber becomes high enough to generate thrust force for rocket propulsion. This thrust system is safer and environment-friendly compared to conventional rocket engines utilizing combustion process. This new type of rocket engine system is called "Water-Liquid Nitrogen rocket engine system" and it can be used for small payload mission with expected altitude of several kilometers. In this paper, experimentally obtained thrust characteristics are shown and analyzed. As a result, relations between the thrust force and the mixing chamber pressure are clarified. Also, it is found that the present injector can attain only half of the theoretically expected specific impulse due to insufficient mixing efficiency.

著者

小井沼 久哉 渡邉 力夫 竹前 俊昭 冨田 信之

出版者

一般社団法人日本機械学会

雑誌

年次大会講演論文集 : JSME annual meeting

巻号頁・発行日

vol.2000, no.4, pp.527-528, 2000-07-31

---

Sloshing motion inside of tank of water rocket has a significant influence on the flight characteristics of the rocket Sloshing characteristics of water rocket was studied on the ground test and its influence on the flight was observed by the flight test. It was identified that rocket with conventional nozzle has large sloshing motion inside of the tank and its flight was unstable. On the other hand, rocket with newly developed nozzle has small sloshing motion and its flight was quite stable.

著者

渡邉 力夫 澁谷 優樹 菅原 洋平

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会誌 (ISSN:13405551)

巻号頁・発行日

vol.136, no.1, pp.4-7, 2016

---

1.はじめに 東京の最高気温が連日35度を超えていた8月初頭であるにもかかわらず,涼しい風が吹く高原らしい爽やかさを体感できるJR小海線「野辺山駅」は,JR線の駅としては最高標高