ロケット-ラムジェット複合サイクルエンジンの研究開発(<特集>次世代航空機エンジンの基盤技術)

概要

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Feasibility study on future transportation vehicle (termed as reference system) is undergoing at Japan Aerospace Exploration Agency, setting the target on reusable, manned launch vehicles. Two-staged vehicle to low earth orbit is the final target of the current study, with hydrocarbon fuel (namely ethanol) in scope for easy and low-cost operation, and finer system packaging due to high density. To compensate loss in specific impulse associated with usage of hydrocarbon fuel, airbreathing technology is fitted to the booster stage of the vehicle, i.e., application of a RBCC (Rocket Based Combined Cycle) engine. This engine is to embed rocket engines within a ramjet-duct, with various operation modes according to flight speed. Research has been conducted at JAXA to establish design methodology of this engine system with an emphasis on aerodynamic design with hydrogen/oxygen as its propellants. Status of the R&D activity is herein reported.
2014-03-20