Study of a c-wing configuration for passive drag and load alleviation

Skinner, S.N. and Zare-Behtash, H. (2018) Study of a c-wing configuration for passive drag and load alleviation. Journal of Fluids and Structures, 78, pp. 175-196. (doi:10.1016/j.jfluidstructs.2017.12.018)

Skinner, S.N. and Zare-Behtash, H. (2018) Study of a c-wing configuration for passive drag and load alleviation. Journal of Fluids and Structures, 78, pp. 175-196. (doi:10.1016/j.jfluidstructs.2017.12.018)

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Abstract

Non-planar wing configurations are often hypothesised as a means for improving the aerodynamic efficiency of large transport aircraft; C-wings may have the ability to exploit and unify drag reduction, aeroelasticity, and dynamics and control but their capacity to do so is ambiguous. The purpose of this work is to provide an experimental demonstration with the aim of verifying the C-wing configurations practical application. Thus, the main objective of this investigation is to quantify the C-wing’s ability for drag and load alleviation relative to a planar wing of equivalent wingspan, lift, and root bending moment at Re = 1.5 × 106 . Surface clay flow visualisations have been used to provide insight into the flow over the wing surface. Aerodynamic performance metrics show that despite the C-wing operating with a 19.1% higher wing wetted area, a peak total drag reduction of 9.5% at α = 6 ◦ is achieved in addition to a 1.1% reduction in the wing root bending moment for equivalent lift. Force platform measurements in combination with laser vibrometry enabled a detailed understanding of the vibrational characteristics between the model and the wind tunnel. It is shown that the C-wing can passively attenuate buffet induced vibrations of the main-wing by up to 68.6% whilst simultaneously reducing total drag without a significant increase in wing weight or root bending moment.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:SKINNER, SHAUN and Zare-Behtash, Dr Hossein
Authors: Skinner, S.N., and Zare-Behtash, H.
Subjects:Q Science > Q Science (General)
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TJ Mechanical engineering and machinery
College/School:College of Science and Engineering > School of Engineering > Aerospace Sciences
Journal Name:Journal of Fluids and Structures
Publisher:Elsevier
ISSN:0889-9746
ISSN (Online):1095-8622
Published Online:04 February 2018
Copyright Holders:Copyright © 2017 Elsevier Ltd.
First Published:First published in Journal of Fluids and Structures 78: 175-196
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
647261National Wind Tunnel FacilityFrank CotonEngineering and Physical Sciences Research Council (EPSRC)EP/L024888/1VPO (ACADEMIC & EDUCATIONAL INNOVATION)
755651Aerodynamic Optimisation of Novel Non-planar Wing Configurations for Drag reduction and Load AlleviationHossein Zare-BehtashRoyal Aeronautical Society (ROYAERSO)21-657/A-SKIENG - AEROSPACE SCIENCES