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Active Flow Control via Piezo-Actuated Airfoils for High-Lift

Behr, Christian and Wierach, Peter and Sinapius, Michael (2014) Active Flow Control via Piezo-Actuated Airfoils for High-Lift. AIAA SciTech 2014, 13.-17. Jan. 2014, Washington, D.C., USA.

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Abstract

This paper presents the development process of a dynamically actuated lip for active blowing at high-lift flaps. The system consists of MEMS pressure sensors to determine the flow conditions and adaptive lips to regulate the mass flow and the velocity of a wall near stream over the internally blown Coanda flap. By the oscillating lip the mass flow in the blowing slot changes dynamically, consequently the momentum exchange of the boundary layer over a high lift flap required mass flow can be reduced. In a first functional demonstrator piezo ceramic d33-stack actuators, operating at low voltage levels, are bonded to a metal substrate in a bending transducer configuration for basic experiments to determine the nominal displacement and the blocking force of the adaptive lip. Prospective all control systems shall be coupled to large-area sensor-actuator-arrays and integrated conformable into the structure. The efficiency increase of an internally blown Coanda flap by using unsteady blowing will be investigated during water channel tests which are in preparation. In this context an appropriate waterproof electrical insulation is evaluated by environmental tests. The first flow investigations will be implemented in a water tunnel in order to reduce the flow velocity and the system’s control frequency by a factor of 10 compared to a wind tunnel. Compared to the prior art, an expansion of the frequency range is expected and the benefits due to the compact and highly integrated design demand a high aerodynamic efficiency of this configuration.

Item URL in elib:https://elib.dlr.de/98882/
Document Type:Conference or Workshop Item (Speech)
Title:Active Flow Control via Piezo-Actuated Airfoils for High-Lift
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Behr, Christianc.behr (at) dlr.deUNSPECIFIED
Wierach, Peterpeter.wierach (at) dlr.deUNSPECIFIED
Sinapius, Michaelmichael.sinapius (at) dlr.deUNSPECIFIED
Date:2014
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:adaptive structures, smart materials, piezoelectric actuators
Event Title:AIAA SciTech 2014
Event Location:Washington, D.C., USA
Event Type:international Conference
Event Dates:13.-17. Jan. 2014
Organizer:AIAA
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 > Multifunctional Materials
Deposited By: Behr, Christian
Deposited On:09 Nov 2015 08:10
Last Modified:09 Nov 2015 08:10

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