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Active Reduction of Turbulent Boundary Layer Induced Noise

Algermissen, Stephan and Misol, Malte and Unruh, Oliver (2010) Active Reduction of Turbulent Boundary Layer Induced Noise. Other.

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Official URL: http://www.dlr.de/fa/Portaldata/17/Resources/dokumente/institut_2010/Innovationsbericht_2010_fuers_Internet.pdf

Abstract

The turbulent boundary layer (TBL) is one of the dominant noise sources in high subsonic aircrafts. Especially in modern aircrafts, where common materials for fuselages are currently substituted by carbon-fiber-reinforced-plastics (CFRP), it is essential to avoid a decrease of passenger comfort as a result of an inferior transmission loss of the new materials. Increasing the transmission loss of CFRP panels, they can be equipped with active structural acoustic control (ASAC) systems. These systems consist of a control unit and surface mounted actuators and sensors. Structural vibrations of the panel are measured by the sensors and filtered by the control unit to estimate the radiated sound power in the far field. The transfer path from actuators over the structure to the sensors is called the controlled plant. Based on this information and a mathematical model of the controlled plant, the controller calculates the signals for the actuators in order to reduce the noise radiation.

Item URL in elib:https://elib.dlr.de/113665/
Document Type:Monograph (Other)
Title:Active Reduction of Turbulent Boundary Layer Induced Noise
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Algermissen, StephanStephan.Algermissen (at) dlr.dehttps://orcid.org/0000-0002-0507-8195
Misol, MalteMalte.Misol (at) dlr.dehttps://orcid.org/0000-0001-8056-1569
Unruh, OliverUNSPECIFIEDUNSPECIFIED
Date:2010
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:34
Editors:
EditorsEmail
UNSPECIFIEDDeutsches Zentrum für Luft- und Raumfahrt e. V.
Status:Published
Keywords:Active control, noise reduction, turbulent boundary layer (TBL), carbon fibre reinforced plastics (CFRP)
Institution:DLR-Institut für Faserverbundleichtbau und Adaptronik
Department:Adaptronik
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, L - Simulation and Validation
Location: Braunschweig
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Adaptronics
Deposited By: Misol, Dr. Malte
Deposited On:14 Aug 2017 09:44
Last Modified:31 Jul 2019 20:11

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