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Parametric Design Study of Rigid Single Element Devices at High Speed and Aerodynamic Assessment at Low Speed Including Investigations on Moving Parts

Büscher, Alexander and Streit, Thomas (2005) Parametric Design Study of Rigid Single Element Devices at High Speed and Aerodynamic Assessment at Low Speed Including Investigations on Moving Parts. DLR-Interner Bericht. IB-124-2005/915.

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Abstract

A parametric analysis of several types of rigid winglet geometries was cariied out at cruise condition using a rapid databased aerodynamic prediction method. The optimised configurations were obtained according to an effective drag approach, which takes into account aerodynamic improvements and structural penalties. The most promising device found was a highly swept, off-loaded anhedral wing tip device with a reduced chord length. For low speed assessment study, both clean and take-off configurations were used. The designed winglet has shown poor flow behaviour at low spped regime due to the design objetive at cruise. To improve the performance at low speed, moving parts and redesigned winglet airfoils were performed. The design study of both geometry modifications is described. The results obtained were confirmed by RANS computations. The resulting geometry provides great benefit at high and low speeds relative to the reference geometry. additionally, a brief design work of a conventional wing tip device was conducted to gain a better understanding of the benefit of the anhedral winglet. Finally, a wing tip shape study was carried out using a Shark winglet.

Item URL in elib:https://elib.dlr.de/46771/
Document Type:Monograph (DLR-Interner Bericht)
Additional Information:Technical Report M-DAW, References MDAW-DLR-303-D032, M-DAW-TUB-306-D035
Title:Parametric Design Study of Rigid Single Element Devices at High Speed and Aerodynamic Assessment at Low Speed Including Investigations on Moving Parts
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Büscher, AlexanderInstitute of Fluid Mechanics, Braunschweig Technical UniversityUNSPECIFIED
Streit, ThomasUNSPECIFIEDUNSPECIFIED
Date:August 2005
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:M-DAW, wing tip device, winglet, design, assessment, novel device, anhedral
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Flight Physics (old)
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Configuration Design
Deposited By: Streit, Dr.rer.nat. Thomas
Deposited On:11 Jan 2007
Last Modified:27 Apr 2009 13:24

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