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The DLR Project LamAiR: Design of a NLF Forward Swept Wing for Short and Medium Range Transport Application

Seitz, Arne and Kruse, Martin and Wunderlich, Tobias and Bold, Jens and Heinrich, Lars (2011) The DLR Project LamAiR: Design of a NLF Forward Swept Wing for Short and Medium Range Transport Application. 29th AIAA Applied Aerodynamics Conference, 27.-30. Juni 2011, Hawaii, USA.

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The LamAiR (Laminar Aircraft Research) project deals with the design of a laminar wing for short and medium range transport aircraft operated in the transonic regime. It is well known that extensive laminar flow on wings of such aircraft still can be achieved by natural means, i.e. solely by contour shaping of the airfoil sections. But with Reynolds numbers being in the order of 25 millions in cruise condition the leading edge sweep of the wing should not be higher than approximately 20deg in order to limit the growth of cross-flow instabilities and, hence, prevent early transition. Consequently, the design cruise Mach number for laminar wings of conventionally aft-swept configurations cannot exceed values of about 0.75 and it is expected that the high-speed off-design performance is rather poor. Within the DLR project LamAiR it is therefore investigated if these aerodynamic shortcomings can be overcome by employing forward sweep in combination with aeroelas-tic tailoring using CFRP (Carbon Fiber Reinforced Plastics) materials. In particular the goal is to design a forward swept laminar wing having a design Mach number of 0.78 and the capability of reaching Mach 0.80 in high-speed off-design. The present paper gives an overview on the current status of the project as well as prospects for future work.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:The DLR Project LamAiR: Design of a NLF Forward Swept Wing for Short and Medium Range Transport Application
AuthorsInstitution or Email of Authors
Seitz, ArneDLR AS
Kruse, MartinDLR AS
Wunderlich, TobiasDLR AS
Bold, JensDLR FA
Heinrich, LarsDLR FA
Date:June 2011
Refereed publication:No
In ISI Web of Science:No
Series Name:AIAA Conference Paper
Keywords:laminar flow, forward swept wing, transport aircraft, aeroelastic tailoring
Event Title:29th AIAA Applied Aerodynamics Conference
Event Location:Hawaii, USA
Event Type:international Conference
Event Dates:27.-30. Juni 2011
Organizer:AIAA, American Institute of Aeronautics and Astronautics
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignement
DLR - Research theme (Project):L -- no assignement
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Functional Lightweight Structures
Institute of Aerodynamics and Flow Technology > Configuration Design
Deposited By: Dr.-Ing. Arne Seitz
Deposited On:25 Jan 2012 09:50
Last Modified:12 Dec 2013 21:35

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