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Assessment of acoustic quality of differently designed control devices

Pott-Pollenske, M. und Dobrzynski, W. (2003) Assessment of acoustic quality of differently designed control devices. DLR-Interner Bericht. 124-03/39, 65 S.

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Kurzfassung

Novel wing designs will incorporate advanced wing-tip devices for a quick wake-vortex break down and an increased wing performance through different devices, e.g. differential flap setting, airbrakes (vented spoilers), large winglets, mini trailing-edge devices and sub-boundary layer vortex generators. Advanced wing configurations will enhance the aircraft's capability to perform noise abatement flight procedures, but may also generate excess aerodynamic noise. To provide first information on spectral noise characteristics of different devices, noise measurements were performed to check-out the devices' aeroacoustic characteristics. This study was performed in DLR's Aeroacoustic Wind Tunnel (AWB) on a 1/10.6 scaled A340 model wing in high lift configuration. All different devices were tested individually by means of an acoustic mirror. The following major results were obtained: (1) As a means to enhance the decay of wake vortices but avoid excess aerodynamic noise generation, DFS (except for the 0°/32° configuration) is superior over different spoiler settings or any of the tested individual wake vortex devices. (2) Noise from mini TEDs gain importance for deflection angles above 60°. (3) Even small spoiler deflections cause significant excess noise generation. (4) SBVGs were found to be essentially uncritical with respect to excess aerodynamic noise generation.

Dokumentart:Berichtsreihe (DLR-Interner Bericht)
Zusätzliche Informationen: LIDO-Berichtsjahr=2004,
Titel:Assessment of acoustic quality of differently designed control devices
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Pott-Pollenske, M.NICHT SPEZIFIZIERT
Dobrzynski, W.NICHT SPEZIFIZIERT
Datum:2003
Seitenanzahl:65
Status:veröffentlicht
Stichwörter:Airframe Noise, Control devices, wind tunnel testing
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Luftfahrt
HGF - Programmthema:L VU - Luftverkehr und Umwelt (alt)
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L VU - Luftverkehr und Umwelt
DLR - Teilgebiet (Projekt, Vorhaben):L - Leiser Luftverkehr (alt)
Standort: Köln-Porz , Braunschweig , Göttingen
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik
Hinterlegt von: Claudia Grant
Hinterlegt am:31 Jan 2006
Letzte Änderung:14 Jan 2010 19:28

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