JAXA Repository / AIREX 未来へ続く、宙(そら)への英知
65207005.pdf909.41 kB
Other TitleCylindrical exploding detonation wave propagating in large-bore plate combustor
Author(jpn)桟敷, 和弥; 寺坂, 昭宏; 脇田, 督司; 戸谷, 剛; 永田, 晴紀
Author(eng)Sajiki, Kazuya; Terasala, Akihiro; Wakita, Masashi; Totani, Tsuyoshi; Nagata, Harunori
Author Affiliation(jpn)北海道大学; 北海道大学; 北海道大学; 北海道大学; 北海道大学
Author Affiliation(eng)Hokkaido University; Hokkaido University; Hokkaido University; Hokkaido University; Hokkaido University
Issue Date2012-03-30
Japan Aerospace Exploration Agency (JAXA)
Publication title宇宙航空研究開発機構特別資料: 第43回流体力学講演会: 航空宇宙数値シミュレーション技術シンポジウム2011論文集
JAXA special publication: Proceedings of 43rd Fluid Dynamics Conference / Aerospace Numerical Simulation Symposium 2011
Start page27
End page32
Publication date2012-03-30
AbstractDetonation initiation is one of the important problems of pulse detonation engines. A reflector installed near a predetonator exit is effective to maintain detonation waves. The incident detonation wave from the predetonator transforms its shape from planer to cylindrical and cylindrical to toroidal around the reflector. To prevent the detonation wave downstream of reflector from disappearing, it is important to form a cylindncal detonation wave upstream of the reflector. In this paper, the authors used a large-bore plate combustor and varied the following parameters to find the necessary condition to form a cylindrical detonation wave: the quantity of the driver gas and time from the ball valve opening to the ignition. To evaluate the quantity of the driver gas, an overfilling distance is used. The overfilling distance is the radius of the 10 mm high cylinder whose volume is equivalent to the total amount of the driver gas used in the experiment. Results indicate that the mixing between the driver and target gases affects the ability of successful transition. When a cylindrical detonation wave is formed, an annular soot track structure appears in the vicinity of the predetonator exit. This structure and velocity of detonation waves show that the transformation of the incident detonation wave into the cylindrical detonation wave resuls from the twice reflection from the plates of the combustor. To form a cylindrical detonation Wave, the driver gas should fill the volume much larger than the annular structure area.
DescriptionPhysical characteristics: Original contains color illustrations
Meeting Information: 43rd Fluid Dynamics Conference / Aerospace Numerical Simulation Symposium 2011 (July 7-8, 2011. Waseda University, International Conference Center), Tokyo Japan
形態: カラー図版あり
会議情報: 第43回流体力学講演会/航空宇宙数値シミュレーション技術シンポジウム2011 (2011年7月7日-8日. 早稲田大学国際会議場) 東京
Document TypeConference Paper
JAXA Category特別資料
Report NoJAXA-SP-11-015

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.