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Performance and Weight Estimates for an Advanced Open Rotor EngineNASA s Environmentally Responsible Aviation Project and Subsonic Fixed Wing Project are focused on developing concepts and technologies which may enable dramatic reductions to the environmental impact of future generation subsonic aircraft. The open rotor concept (also historically referred to an unducted fan or advanced turboprop) may allow for the achievement of this objective by reducing engine fuel consumption. To evaluate the potential impact of open rotor engines, cycle modeling and engine weight estimation capabilities have been developed. The initial development of the cycle modeling capabilities in the Numerical Propulsion System Simulation (NPSS) tool was presented in a previous paper. Following that initial development, further advancements have been made to the cycle modeling and weight estimation capabilities for open rotor engines and are presented in this paper. The developed modeling capabilities are used to predict the performance of an advanced open rotor concept using modern counter-rotating propeller designs. Finally, performance and weight estimates for this engine are presented and compared to results from a previous NASA study of advanced geared and direct-drive turbofans.
Document ID
20120014381
Document Type
Technical Memorandum (TM)
Authors
Hendricks, Eric S. (NASA Glenn Research Center Cleveland, OH, United States)
Tong, Michael T. (NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
August 26, 2013
Publication Date
September 1, 2012
Subject Category
Aircraft Propulsion and Power
Report/Patent Number
AIAA Paper 2012-3911
E-18415
NASA/TM-2012-217710
Meeting Information
48th Joint Propulsion Conference and Exhibit(Atlanta, GA)
Funding Number(s)
WBS: WBS 561581.02.08.03.42.03
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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