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Modeling and Control Design for a Turboelectric Single Aisle Aircraft Propulsion SystemA nonlinear dynamic model with full flight envelope controller is developed for the propulsion system of a partially turboelectric single-aisle aircraft. The propulsion system model consists of two turbofan engines with a large percentage of power extraction, feeding an electric tail fan for boundary layer ingestion. The dynamic model is compared against an existing steady state design model. An electrical system model using a simple power flow approach is integrated into existing modeling tools used for dynamic simulation of the turbomachinery of the vehicle. In addition to the simple power flow model of the electrical system, a more detailed model is used for comparison at a key vehicle transient flight condition. The controller is a gain scheduled proportional-integral type that is examined throughout the flight envelope for performance metrics such as rise time and operability margins. Potential improvements in efficiency for the vehicle are explored by adjusting the power split between the energy used for thrust by the turbofans and that extracted to supply power to the tail fan. Finally, an operability study of the vehicle is conducted using a 900 nautical mile mission profile for a nominal vehicle configuration, a deteriorated propulsion system at the end of its operating life, and an optimized power schedule with improved efficiency.
Document ID
20180005436
Document Type
Conference Paper
External Source(s)
Authors
Connolly, Joseph W. (NASA Glenn Research Center Cleveland, OH, United States)
Chapman, Jeffryes W. (NASA Glenn Research Center Cleveland, OH, United States)
Stalcup, Erik J. (NASA Glenn Research Center Cleveland, OH, United States)
Hunker, Keith R. (NASA Glenn Research Center Cleveland, OH, United States)
Chicatelli, Amy K. (Vantage Partners, LLC Brook Park, OH, United States)
Thomas, George L. (Vantage Partners, LLC Brook Park, OH, United States)
Date Acquired
September 21, 2018
Publication Date
July 9, 2018
Subject Category
Aircraft Propulsion and Power
Report/Patent Number
GRC-E-DAA-TN58010
Meeting Information
AIAA Propulsion and Energy - IEEE Electric Aircraft Technologies Symposium(Cincinnati, OH)
Funding Number(s)
WBS: WBS 081876.02.03.50.05.01.02
CONTRACT_GRANT: NNC12BA01B
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
Turboelectric
Control

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