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How to satisfy the takeoff noise requirements for a supersonic transport

Michel, Ulf (1987) How to satisfy the takeoff noise requirements for a supersonic transport. AIAA 11th Aeroacoustics Conference, 19. - 21. Oktober 1987, Palo Alto, California, USA.

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Kurzfassung

The noise during takeoff of a supersonic transport is calculated for the flyover and the lateral reference noise measurement points defined by ICAO Annex 16. Only the contribution of jet mixing noise is considered. The influences of the following parameters are considered: jet speed, aircraft weight, aircraft wing loading, aircraft lift-to-drag ratio, and the amount of power cutback after takeoff. The influence of the takeoff procedure is also studied. It is shown that jet speed has the largest influence of all parameters and that values of about 400 m/s or less are required to satisfy the noise limits that are currently valid for subsonic aircraft. Such low jet speeds can be achieved by choosing large engine bypass ratios or by employing ejector mixers with large nozzle exit diameters. The first solution may be difficult to realize technically for a supersonic transport, the second solution requires that the mixer can be fully retracted, which may be impossible because of its size.

Dokumentart:Konferenzbeitrag (Paper)
Titel:How to satisfy the takeoff noise requirements for a supersonic transport
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Michel, Ulfulf.michel@dlr.de
Datum:19 Oktober 1987
Status:veröffentlicht
Stichwörter:jet noise, supersonic transport, noise limits
Veranstaltungstitel:AIAA 11th Aeroacoustics Conference
Veranstaltungsort:Palo Alto, California, USA
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:19. - 21. Oktober 1987
Veranstalter :American Institute of Aeronautics and Astronautics
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: Berlin-Adlershof
Institute & Einrichtungen:Institut für Antriebstechnik > Triebwerksakustik
Hinterlegt von: Prof. Dr.-Ing. Ulf Michel
Hinterlegt am:14 Apr 2010 16:26
Letzte Änderung:14 Apr 2010 16:26

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