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Presented By: Aerospace Engineering

AE Graduate Seminar Series - Boundary Layer Ingestion for Transport Aircraft: Power Balance, Wind Tunnel Tests, and Analysis Framework

Alejandra Uranga, Gabilan Assistant Professor, USC

Alejandra Uranga, Gabilan Assistant Professor, USC

Boundary layer ingestion (BLI), in which part of an aircraft airframe's boundary layer is ingested by the propulsors, has the potential to provide significant improvements in fuel efficiency compared to conventional engine installations. The wind tunnel tests of the D8 "double-bubble" aircraft in back-to-back BLI and non-BLI configurations constitute a proof-of-concept for the use of BLI in transport aircraft. These were carried out as part of a NASA N+3 project led by MIT in collaboration with Aurora Flight Sciences and Pratt & Whitney.

This presentation will cover the wind tunnel experiments, with emphasis on the quantification of the power-saving benefit of BLI. It will introduce the power balance method for analyzing highly-integrated aircraft configurations, and how it was applied to the D8 tests to determine the aerodynamic benefit of BLI. The different sources of benefits with BLI will be related to the dissipation sources in the flowfield, and an analysis framework for aircraft with BLI will be presented.

About the speaker...
Alejandra Uranga is a Gabilan Assistant Professor in the Department of Aerospace and Mechanical Engineering at USC. Before joining USC in 2016, she was a Research Engineer at MIT in the Department of Aeronautics and Astronautics. While at MIT, she was the project technology lead and co-PI for design, development, simulation, and wind tunnel testing of the D8 double-bubble advanced transport aircraft concept under the NASA N+3 program.

She holds a PhD degree in Aeronautics and Astronautics from MIT, and a Master's of Applied Sciences in Mechanical Engineering from the University of Victoria, BC, Canada. She completed her undergraduate education at the Université Paris 7 Denis Diderot, Paris, France, with an associate's degree in Mathematics, and has a B.S. in Aerospace Engineering from the Florida Institute of Technology. Her research interests are in aerodynamics, novel aircraft design, and integrated propulsion systems, for which she favors a combined computational and experimental approach.

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