High Lift Common Research Model for Wind Tunnel Testing: An Active Flow Control Perspective

This paper provides an overview of a research and development effort sponsored by the NASA Advanced Air Transport Technology Project to achieve the required high-lift performance using active flow control (AFC) on simple hinged flaps while reducing the cruise drag associated with the external mechan...

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Bibliographic Details
Published inNASA Center for AeroSpace Information (CASI). Conference Proceedings
Main Authors Lin, John C, Melton, Latunia P, Viken, Sally A, Andino, Marlyn Y, Koklu, Mehti, Hannon, Judith A, Vatsa, Veer N
Format Conference Proceeding
LanguageEnglish
Published Hampton NASA/Langley Research Center 09.01.2017
Subjects
Active control
Air transportation
Aircraft
Blowing
Configurations
Drag reduction
Fairings
Flaps
Flow control
High lift
R&D
Research & development
Subsonic aircraft
Transport aircraft
Wind tunnel testing
Wind tunnels
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Summary:This paper provides an overview of a research and development effort sponsored by the NASA Advanced Air Transport Technology Project to achieve the required high-lift performance using active flow control (AFC) on simple hinged flaps while reducing the cruise drag associated with the external mechanisms on slotted flaps of a generic modern transport aircraft. The removal of the external fairings for the Fowler flap mechanism could help to reduce drag by 3.3 counts. The main challenge is to develop an AFC system that can provide the necessary lift recovery on a simple hinged flap high-lift system while using the limited pneumatic power available on the aircraft. Innovative low-power AFC concepts will be investigated in the flap shoulder region. The AFC concepts being explored include steady blowing and unsteady blowing operating in the spatial and/or temporal domain. Both conventional and AFC-enabled high-lift configurations were designed for the current effort. The high-lift configurations share the cruise geometry that is based on the NASA Common Research Model, and therefore, are also open geometries. A 10%-scale High Lift Common Research Model (HL-CRM) is being designed for testing at the NASA Langley Research Center 14- by 22-Foot Subsonic Tunnel during fiscal year 2018. The overall project plan, status, HL-CRM configurations, and AFC objectives for the wind tunnel test are described.