NTRS - NASA Technical Reports Server

Back to Results
Turbine Electrified Energy Management (TEEM) For Enabling More Efficient Engine DesignsNASA is investing in Electrified Aircraft Propulsion (EAP) research as part of an effort to assist industry in meeting the future needs of a global aviation market. The integration of electric machines into traditional turbine-based propulsion provides opportunities to change system architectures effecting radical improvements in propulsive efficiency. However, less consideration has been afforded to the utilization of these electrical machines to improve the thermal efficiency and performance of the gas turbine engine. Noting this deficit, a novel operability concept is proposed and is referred to as Turbine Electrified Energy Management (TEEM). The concept is a transient control technology that supplements the main fuel control for the suppression of the natural off-design dynamics associated with changes in engine operating state. Here the electric machines, used as engine actuators during the transient, add or extract torque from the engine shafts to maintain the speed-flow characteristics of steady-state design operation. This greatly reduces the need to maintain transient stall margin stack in the compressors, among other potential benefits. This paper demonstrates the feasibility of the concept in dynamic simulation using a Numerical Propulsion System Simulation (NPSS) engine model of a NASA hybrid electric propulsion concept known as the Parallel Hybrid Electric Turbofan (hFan).
Document ID
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Culley, Dennis E.
(NASA Glenn Research Center Cleveland, OH, United States)
Kratz, Jonathan L.
(NASA Glenn Research Center Cleveland, OH, United States)
Thomas, George L.
(N and R Engineering and Management Services Parma Heights, OH, United States)
Date Acquired
April 25, 2019
Publication Date
July 9, 2018
Subject Category
Aircraft Propulsion And Power
Meeting Information
Meeting: AIAA Propulsion and Energy Forum
Location: Cincinnati, OH
Country: United States
Start Date: July 9, 2018
End Date: July 11, 2018
Sponsors: American Institute of Aeronautics and Astronautics (AIAA)
Funding Number(s)
WBS: 109492.
Distribution Limits
Public Use Permitted.
LEW 19715-1
Patent Application
Technical Review
NASA Peer Committee
No Preview Available