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Computational Analysis of Powered Lift Augmentation for the LEAPTech Distributed Electric Propulsion WingA computational study of a distributed electric propulsion wing with a 40deg flap deflection has been completed using FUN3D. Two lift-augmentation power conditions were compared with the power-off configuration on the high-lift wing (40deg flap) at a 73 mph freestream flow and for a range of angles of attack from -5 degrees to 14 degrees. The computational study also included investigating the benefit of corotating versus counter-rotating propeller spin direction to powered-lift performance. The results indicate a large benefit in lift coefficient, over the entire range of angle of attack studied, by using corotating propellers that all spin counter to the wingtip vortex. For the landing condition, 73 mph, the unpowered 40deg flap configuration achieved a maximum lift coefficient of 2.3. With high-lift blowing the maximum lift coefficient increased to 5.61. Therefore, the lift augmentation is a factor of 2.4. Taking advantage of the fullspan lift augmentation at similar performance means that a wing powered with the distributed electric propulsion system requires only 42 percent of the wing area of the unpowered wing. This technology will allow wings to be 'cruise optimized', meaning that they will be able to fly closer to maximum lift over drag conditions at the design cruise speed of the aircraft.
Document ID
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Deere, Karen A.
(NASA Langley Research Center Hampton, VA, United States)
Viken, Sally A.
(NASA Langley Research Center Hampton, VA, United States)
Carter, Melissa B.
(NASA Langley Research Center Hampton, VA, United States)
Viken, Jeffrey K.
(NASA Langley Research Center Hampton, VA, United States)
Wiese, Michael R.
(Craig Technologies, Inc. Hampton, VA, United States)
Farr, Norma L.
(Craig Technologies, Inc. Hampton, VA, United States)
Date Acquired
June 28, 2017
Publication Date
June 5, 2017
Subject Category
Report/Patent Number
Meeting Information
Meeting: AIAA Aviation 2017 Forum
Location: Denver, CO
Country: United States
Start Date: June 5, 2017
End Date: June 9, 2017
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
WBS: WBS 107210.02.06.07
Distribution Limits
Public Use Permitted.
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