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Lessons learned from wind tunnel testing of a droop-nose morphing wingtip

Vasista, Srinivas and Riemenschneider, Johannes and Van de Kamp, Bram and Monner, Hans Peter and Cheung, R.C.M. and Wales, C. and Cooper, J.E. (2016) Lessons learned from wind tunnel testing of a droop-nose morphing wingtip. In: Lessons learned from wind tunnel testing of a droop-nose morphing wingtip, 9799. SPIE. Active and Passive Smart Structures and Integrated Systems 2016, 20-24 March 2016, Las Vegas, United States. DOI: 10.1117/12.2219163

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Official URL: http://spie.org/Publications/Proceedings/Paper/10.1117/12.2219163?origin_id=x4325&start_volume_number=9700

Abstract

This work presents the lessons learned from wind tunnel tests of a droop-nose morphing wingtip as part of the EU project NOVEMOR. The design followed a sequential chain and was largely driven through optimization tools, including a glass-fiber composite skin optimization tool and a topology optimization tool for the design of internal super-elastic and aluminium compliant mechanisms. The device was tested in the low speed tunnel at the University of Bristol to determine the structural response under aerodynamic loading. Measurements of strain from strain gauges show that the structure is capable of handing the aerodynamic loads though also show an imbalance of strain between the components. Measurements of surface pressures show a small variation of cp with the 2° droop morphing variation as per the target. The wind tunnel testing showed that further developments to the design chain are necessary, in particular the need for a concurrent as opposed to sequential chain for the design of the various components. Considerations of other problem formulations, the inclusion of nonlinear finite element analysis, and ways to interpret the structural boundary of the topology optimization results with more confidence are required. The utilization of super-elastic materials in morphing structures may also prove to be highly beneficial for their performance.

Item URL in elib:https://elib.dlr.de/104689/
Document Type:Conference or Workshop Item (Speech)
Title:Lessons learned from wind tunnel testing of a droop-nose morphing wingtip
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Vasista, SrinivasInstitut für Faserverbundleichtbau und Adaptronik - AdaptronikUNSPECIFIED
Riemenschneider, JohannesInstitut für Faserverbundleichtbau und Adaptronik - AdaptronikUNSPECIFIED
Van de Kamp, BramInstitut für Faserverbundleichtbau und Adaptronik - AdaptronikUNSPECIFIED
Monner, Hans PeterInstitut für Faserverbundleichtbau und Adaptronik - AdaptronikUNSPECIFIED
Cheung, R.C.M.Department of Aerospace Engineering, University of BristolUNSPECIFIED
Wales, C.Department of Aerospace Engineering, University of BristolUNSPECIFIED
Cooper, J.E.Department of Aerospace Engineering, University of BristolUNSPECIFIED
Date:15 April 2016
Journal or Publication Title:Lessons learned from wind tunnel testing of a droop-nose morphing wingtip
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:9799
DOI :10.1117/12.2219163
Publisher:SPIE
Status:Published
Keywords:Morphing, compliant mechanism, droop-nose, topology optimization
Event Title:Active and Passive Smart Structures and Integrated Systems 2016
Event Location:Las Vegas, United States
Event Type:international Conference
Event Dates:20-24 March 2016
Organizer:SPIE
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures and Materials
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Adaptronics
Deposited By: Vasista, Srinivas
Deposited On:08 Nov 2016 12:36
Last Modified:08 Nov 2016 12:36

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