elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Numerical and Experimental Insights into the Noise Generation of a Circulation Control Airfoil

Rossian, Lennart and Suryadi, Alexandre and Rossignol, Karl-Stephane and Ewert, Roland and Herr, Michaela and Delfs, Jan Werner and Kumar, Pradeep (2018) Numerical and Experimental Insights into the Noise Generation of a Circulation Control Airfoil. In: 24th AIAA/CEAS Aeroacoustics Conference, 2018. American Institute of Aeronautics and Astronautics Inc.. 2018 AIAA/CEAS Aeroacoustics Conference at AIAA AVIATION Forum 2018 Atlanta, GA, USA, 25.-29. Jun. 2018, Atlanta, Georgia, USA. DOI: 10.2514/6.2018-3139 ISBN 978-162410560-9

[img] PDF
10MB

Official URL: https://arc.aiaa.org/doi/abs/10.2514/6.2018-3139

Abstract

With the advances in reduction of propulsion related noise from aircraft, airframe noise gets more and more into focus. During approach and landing, the high-lift system of the wings becomes one major acoustic source region contributing to the overall emitted noise. One promising approach to reduce this airframe noise is to change the complete high-lift system from a classic three element slat-wing-flap configuration to a slot-less system with active blowing and droop nose. Preceding experimental investigations have shown, that such a configuration may provide a noise reduction above 2 kHz on the model scale. In the present paper both numerical and experimental investigations concerning the acoustics of a high-lift wing with droop nose and active blowing are presented. Thereby, an insight into the acoustic source mechanisms for different aerodynamic setups is provided that in the future will serve as a basis for the design of a low-noise high-lift configuration. It was found, that in principle three source mechanisms are to be considered. In the low to mid frequency domain, mostly turbulence-geometry interaction noise such as trailing edge noise, jet-nozzle interaction noise and curvature noise from the flow being bent around the flap are supposed to be the driving mechanisms. Moreover, the high frequency domain is found to be dominated by mixing noise from the high speed jet.

Item URL in elib:https://elib.dlr.de/125431/
Document Type:Conference or Workshop Item (Speech)
Title:Numerical and Experimental Insights into the Noise Generation of a Circulation Control Airfoil
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Rossian, LennartLennart.Rossian (at) dlr.deUNSPECIFIED
Suryadi, AlexandreAlexandre.Suryadi (at) dlr.deUNSPECIFIED
Rossignol, Karl-StephaneKarl-Stephane.Rossignol (at) dlr.deUNSPECIFIED
Ewert, RolandRoland.Ewert (at) dlr.deUNSPECIFIED
Herr, MichaelaMichaela.Herr (at) dlr.deUNSPECIFIED
Delfs, Jan WernerJan.Delfs (at) dlr.deUNSPECIFIED
Kumar, Pradeeppradeep.kumar (at) tu-bs.deUNSPECIFIED
Date:2018
Journal or Publication Title:24th AIAA/CEAS Aeroacoustics Conference, 2018
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
DOI :10.2514/6.2018-3139
Publisher:American Institute of Aeronautics and Astronautics Inc.
Series Name:AIAA Paper
ISBN:978-162410560-9
Status:Published
Keywords:Aeroacoustics of Circulation Control Airfoil, Coanda flap, Compuational Aeroacoustics, Jet curvature noise
Event Title:2018 AIAA/CEAS Aeroacoustics Conference at AIAA AVIATION Forum 2018 Atlanta, GA, USA
Event Location:Atlanta, Georgia, USA
Event Type:international Conference
Event Dates:25.-29. Jun. 2018
Organizer:AIAA American Institute of Aeronautics and Astronautics
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 - Simulation and Validation
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Technical Acoustics
Deposited By: Delfs, Prof.Dr. Jan Werner
Deposited On:03 Jan 2019 14:18
Last Modified:31 Jul 2019 20:23

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.