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

Fuselage Excitation during Cruise Flight Conditions: Influence of Different TBL Wavenumber-Frequency Models on Structural Response

Klabes, Alexander and Herr, Michaela and Callsen, Sören and Appel, Christina (2017) Fuselage Excitation during Cruise Flight Conditions: Influence of Different TBL Wavenumber-Frequency Models on Structural Response. In: CD-ROM Conference Proceedings, pp. 1-14. INTER-NOISE 2017, 46th International Congress and Exposition on Noise Control Engineering, 27.-30. August 2017, Hong Kong, China.

[img] PDF - Registered users only
1MB

Official URL: http://internoise2017.org/

Abstract

In the last fifty years many semi-empirical models to predict surface-pressure fluctuations beneath turbulent boundary-layers (TBL) have been developed for a large variety of test conditions. Nowadays, the relevance of the TBL as a source of cabin interior noise is steadily increasing due to quieter aircraft engines. Beside the auto-spectra, which characterize the strength of the TBL excitation at one point, spatio-temporal information is important to describe the excitation. For numerical structural excitation response calculations the spatio-temporal information is typically modeled in terms of the wavenumber-frequency spectrum. It gives information about the development of turbulence over space and time. This paper briefly reviews available published models to estimate this behavior. Furthermore, the influence of these different models, when numerically coupled to structures, is systematically examined. Firstly, systematical testing is performed on simply supported flat plates by using two methods; a method developed by Graham and a commercial software package using Statistical Energy Analysis (SEA). Secondly, tests on Airbus aircraft structures are performed by using SEA. Necessary aerodynamic input data are not taken from flat plate estimates but from CFD calculations as performed with DLR's in-house RANS solver TAU. Finally, calculation results of the structural vibration are compared with measured structural vibrations of the aircraft primary structure at cruise flight conditions. Beside the results from published semi-empirical wavenumber-frequency models also predictions with DLR's Fast Random Particle-Mesh Method (FRPM) of the spatio-temporal TBL behavior are presented for Airbus aircraft in cruise flight conditions.

Item URL in elib:https://elib.dlr.de/116567/
Document Type:Conference or Workshop Item (Speech)
Title:Fuselage Excitation during Cruise Flight Conditions: Influence of Different TBL Wavenumber-Frequency Models on Structural Response
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Klabes, AlexanderAlexander.Klabes (at) dlr.deUNSPECIFIED
Herr, MichaelaMichaela.Herr (at) dlr.deUNSPECIFIED
Callsen, Sörensoeren.callsen (at) airbus.comUNSPECIFIED
Appel, ChristinaChristina.Appel (at) dlr.deUNSPECIFIED
Date:August 2017
Journal or Publication Title:CD-ROM Conference Proceedings
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-14
Status:Published
Keywords:Turbulent Boundary Layer, TBL, Fuselage Excitation, Semi-Empirical Model, Flight Tests, Computational Fluid Dynamics, Statistic Energy Analysis
Event Title:INTER-NOISE 2017, 46th International Congress and Exposition on Noise Control Engineering
Event Location:Hong Kong, China
Event Type:international Conference
Event Dates:27.-30. August 2017
Organizer:International Institute of Noise Control Engineering (I-INCE)
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 - Flight Physics
Location: Braunschweig
Institutes and Institutions:Institute for Aerodynamics and Flow Technology > Technical Acoustics
Deposited By: Herr, Michaela
Deposited On:05 Dec 2017 15:02
Last Modified:05 Dec 2017 15:02

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.