NDLI: Drag reduction through distributed electric propulsion

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Drag reduction through distributed electric propulsion

Content Provider	NASA Technical Reports Server (NTRS)
Author	Stoll, Alex M. Bevirt, JoeBen Moore, Mark D. Fredericks, William J. Borer, Nicholas K.
Copyright Year	2014
Description	One promising application of recent advances in electric aircraft propulsion technologies is a blown wing realized through the placement of a number of electric motors driving individual tractor propellers spaced along each wing. This configuration increases the maximum lift coefficient by providing substantially increased dynamic pressure across the wing at low speeds. This allows for a wing sized near the ideal area for maximum range at cruise conditions, imparting the cruise drag and ride quality benefits of this smaller wing size without decreasing takeoff and landing performance. A reference four-seat general aviation aircraft was chosen as an exemplary application case. Idealized momentum theory relations were derived to investigate tradeoffs in various design variables. Navier-Stokes aeropropulsive simulations were performed with various wing and propeller configurations at takeoff and landing conditions to provide insight into the effect of different wing and propeller designs on the realizable effective maximum lift coefficient. Similar analyses were performed at the cruise condition to ensure that drag targets are attainable. Results indicate that this configuration shows great promise to drastically improve the efficiency of small aircraft.
File Size	5806348
Page Count	9
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20140011507
Archival Resource Key	ark:/13960/t5hb44c49
Language	English
Publisher Date	2014-06-16
Access Restriction	Open
Subject Keyword	Aircraft Design, Testing And Performance Propellers Aircraft Landing Aerodynamic Coefficients Design Analysis Takeoff Lift Electric Motors Wings Riding Quality Drag Reduction Simulation Tradeoffs Dynamic Pressure Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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