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Evaluation of an Ejector Ramjet Based Propulsion System for Air-Breathing Hypersonic FlightA Rocket Based Combined Cycle (RBCC) engine system is designed to combine the high thrust to weight ratio of a rocket along with the high specific impulse of a ramjet in a single, integrated propulsion system. This integrated, combined cycle propulsion system is designed to provide higher vehicle performance than that achievable with a separate rocket and ramjet. The RBCC engine system studied in the current program is the Aerojet strutjet engine concept, which is being developed jointly by a government-industry team as part of the Air Force HyTech program pre-PRDA activity. The strutjet is an ejector-ramjet engine in which small rocket chambers are embedded into the trailing edges of the inlet compression struts. The engine operates as an ejector-ramjet from takeoff to slightly above Mach 3. Above Mach 3 the engine operates as a ramjet and transitions to a scramjet at high Mach numbers. For space launch applications the rockets would be re-ignited at a Mach number or altitude beyond which air-breathing propulsion alone becomes impractical. The focus of the present study is to develop and demonstrate a strutjet flowpath using hydrocarbon fuel at up to Mach 7 conditions.
Document ID
19980018678
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Thomas, Scott R.
(NASA Lewis Research Center Cleveland, OH United States)
Perkins, H. Douglas
(NASA Lewis Research Center Cleveland, OH United States)
Trefny, Charles J.
(NASA Lewis Research Center Cleveland, OH United States)
Date Acquired
August 17, 2013
Publication Date
December 1, 1997
Publication Information
Publication: Future Aerospace Technology in the Service of the Alliance
Volume: 3
Subject Category
Aircraft Propulsion And Power
Distribution Limits
Public
Copyright
Other
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