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ACTUATION OF AN ADAPTIVE SHOCK CONTROL BUMP USING PRESSURIZED CHAMBERS

Alves de Sousa, Nuno and Afzal, Suleman and Kintscher, Markus (2017) ACTUATION OF AN ADAPTIVE SHOCK CONTROL BUMP USING PRESSURIZED CHAMBERS. In: Proceedings of ICEDyn 2017 - International Conference on Structural Engineering Dynamics, 59. Instituto de Engenharia Mecânica (IDMEC), Instituto Superior Técnico, University of Lisbon. ICEDyn 2017 - International Conference on Structural Engineering Dynamics, July 3rd-5th 2017, Ericeira, Portugal.

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Abstract

The dawn of research on shock and boundary layer interaction control dates back to the 1970s, when humped transonic aerofoils were first studied as a means to improve the performance of supercritical aerofoil technology at off-design conditions. Since then, shock control bumps (SCBs) have been found to be promising devices for such kind of flow control. They have a smearing effect on the shock wave structure achieved through isentropic pre-compression of the flow upstream of the main shock and can significantly lower wave drag without incurring unacceptable viscous losses. However, their performance is strongly dependent on a set of geometrical parameters which must be adjusted according to the ever-changing flight conditions. A concept for an adaptive SCB is therefore presented. The proposed actuation mechanism aims at a compact, lightweight and simple structure which could be integrated in the spoiler region of near-future aircraft without major design changes required. Numerical optimization of a simplified analytical model of the structure is used to investigate the SCB adaptation to various aerodynamic target shapes. Compromises between geometrical conformity and both structural and actuation related requirements are studied. Furthermore, an outlook is given on design issues related to three-dimensional effects on a finite-width SCB.

Item URL in elib:https://elib.dlr.de/115483/
Document Type:Conference or Workshop Item (Speech)
Title:ACTUATION OF AN ADAPTIVE SHOCK CONTROL BUMP USING PRESSURIZED CHAMBERS
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Alves de Sousa, Nunoinstituto superior tecnico, universidade lisaboaUNSPECIFIED
Afzal, SulemanInstituto Superior Técnico, Universidade de LisboaUNSPECIFIED
Kintscher, Markusmarkus.kintscher (at) dlr.dehttps://orcid.org/0000-0003-0600-0135
Date:2017
Journal or Publication Title:Proceedings of ICEDyn 2017 - International Conference on Structural Engineering Dynamics
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:59
Publisher:Instituto de Engenharia Mecânica (IDMEC), Instituto Superior Técnico, University of Lisbon
Status:Published
Keywords:Shock control bump; wave drag minimization; morphing spoiler; pressure actuated adaptive structure; structural optimization
Event Title:ICEDyn 2017 - International Conference on Structural Engineering Dynamics
Event Location:Ericeira, Portugal
Event Type:international Conference
Event Dates:July 3rd-5th 2017
Organizer:IDMEC/Instituto Superior Técnico
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: Kintscher, Dr.-Ing. Markus
Deposited On:23 Nov 2017 14:41
Last Modified:23 Nov 2017 14:41

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