JAXA Repository / AIREX 未来へ続く、宙(そら)への英知
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Other TitleAn Investigation on Engine Configuration utilizing Aerodynamic Effect of Shock Waves in a Scramjet Engine
Author(jpn)佐藤, 茂; 宗像, 利彦; 石河, 深雪
Author(eng)Sato, Shigeru; Munakata, Toshihiko; Ishikawa, Miyuki
Author Affiliation(jpn)宇宙航空研究開発機構宇宙輸送ミッション本部宇宙輸送系推進技術研究開発センター角田; 日立東日本ソリューションズ; スペースサービス
Author Affiliation(eng)Kakuda, Space Transportation Propulsion Research and Development Center, Space Transportation Mission Directorate, Japan Aerospace Exploration Agency (JAXA); Hitachi East Japan Solutions; Space Service
Issue Date2010-02-26
PublisherJapan Aerospace Exploration Agency (JAXA)
Publication titleJAXA special publication: Proceedings fo 41st Fluid Dynamics Conference / Aerospace Numerical Simulation Symposium 2009
宇宙航空研究開発機構特別資料: 第41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2009論文集
Publication date2010-02-26
AbstractJapan Aerospace Exploration Agency has been investigating scramjet engines in Kakuda Space Center using RamJet Engine Test Facility (RJTF) et al since National Aerospace Laboratory days. The engine performance tested at the flight condition of Mach 6 in RJTF showed very important characteristics depending on internal geometry. Recently Sato and others found in the result of CFD research that there was a hot area caused by 3-dimensional interaction of the shock wave from cowl leading edge and the shock wave from strut leading edge and that the area covered fuel injection area. This hot area named "hot triangle" can bring the good transition from weak combustion to intensive combustion in the engine. It is very important to consider the hot triangle when engine geometry is designed. The hot triangle was realized in the engine configuration equipped with a 5/5-height strut, that is, "the original-height strut". Once the hot triangle is kept, some part of the strut which does not contribute the hot triangle can be cut off. In this report the authors propose inverted struts which have shorter height than the original one but attached on the cowl. The authors used CFD method to find hot triangles which may appear in an inverted 1/5-height and an inverted 2/5-height strut. It is found that the inverted 2/5-height strut gives the same effect as the original one. According to this result, the shorter strut can give smaller drag and increase the net thrust of the engine.
DescriptionOriginal contains color illustrations
Meeting Information: 18 June-19 June, 2009, Japan Aerospace Exploration Agency
形態: カラー図版あり
会議情報: 平成21年6月18-19日. 宇宙航空研究開発機構調布航空宇宙センター
Document TypeConference Paper
JAXA Category特別資料
Report NoJAXA-SP-09-011

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