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Aerodynamic Shape Optimization of the STARC-ABL Concept for Minimal Inlet DistortionThe NASA single-aisle turboelectric aircraft with an aft boundary layer propulsor (STARC-ABL) concept utilizes a novel electrically driven aft fan that ingests the fuselage boundary-layer for increased propulsive efficiency. In this paper we examine how aerodynamic shaping of the fuselage diffuser and nacelle inlet can reduce the flow distortion at the aft fan. Adjoint-based aerodynamic shape optimization with the ARP1420 distortion metric objective is used to automatically determine the optimal shapes for minimal fan-face distortion. Single and multipoint optimizations are carried out for simplified body-duct and wing-body-duct configurations. These two configurations highlight the importance of including the wing downwash effects when designing the propulsor. The optimizations showed the body-duct configuration can obtain cruise distortion values of approximately 1% while the wing-body-duct configuration can obtain distortion values of just over 2%.

Document ID
Document Type
Conference Paper
Kenway, Gaetan K. W.
(Science and Technology Corp. Moffett Field, CA, United States)
Kiris, Cetin
(NASA Ames Research Center Moffett Field, CA, United States)
Cadieux, Francois
(Science and Technology Corp. Moffett Field, CA, United States)
Date Acquired
May 5, 2020
Publication Date
January 8, 2018
Subject Category
Aircraft Design, Testing And Performance
Report/Patent Number
Meeting Information
Meeting: AIAA SciTech 2018
Location: Kissimmee, FL
Country: United States
Start Date: January 8, 2018
End Date: January 12, 2018
Sponsors: American Institute of Aeronautics and Astronautics (AIAA)
Funding Number(s)
Distribution Limits
Public Use Permitted.
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