• search hit 1 of 1
Back to Result List

Wind-Tunnel Study of a Wing-Embedded Lifting Fan Remaining Open in Cruise Flight

  • It is investigated whether a nonrotating lifting fan remaining uncovered during cruise flight, as opposed to being covered by a shutter system, can be realized with limited additional drag and loss of lift during cruise flight. A wind-tunnel study of a wing-embedded lifting fan has been conducted at the Side Wind Test Facility Göttingen of DLR, German Aerospace Center in Göttingen using force, pressure, and stereoscopic particle image velocimetry techniques. The study showed that a step on the lower side of the wing in front of the lifting fan duct increases the lift-to-drag ratio of the whole model by up to 25% for all positive angles of attack. Different sizes and inclinations of the step had limited influence on the surface pressure distribution. The data indicate that these parameters can be optimized to maximize the lift-to-drag ratio. A doubling of the curvature radius of the lifting fan duct inlet lip on the upper side of the wing affected the lift-to-drag ratio by less than 1%. The lifting fan duct inlet curvature can therefore be optimized to maximize the vertical fan thrust of the rotating lifting fan during hovering without affecting the cruise flight performance with a nonrotating fan.

Export metadata

Additional Services

Share in Twitter Search Google Scholar
Metadaten
Author:B. Hoeveler, André Bauknecht, C. Christian Wolf, Frank Janser
DOI:https://doi.org/10.2514/1.C035422
ISSN:1533-3868
Parent Title (English):Journal of Aircraft
Publisher:AIAA
Place of publication:Reston, Va.
Document Type:Article
Language:English
Year of Completion:2020
Date of the Publication (Server):2020/08/12
Volume:57
Issue:4
Link:https://doi.org/10.2514/1.C035422
Zugriffsart:bezahl
Institutes:FH Aachen / Fachbereich Luft- und Raumfahrttechnik
FH Aachen / ECSM European Center for Sustainable Mobility
collections:Verlag / American Institute of Aeronautics and Astronautics (AIAA)