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Investigation of the impact of a Variable Area Fan Nozzle on the overall performance of an UHBR-Highlift-Configuration

Ritter, Sebastian und Schriever, Raimund (2016) Investigation of the impact of a Variable Area Fan Nozzle on the overall performance of an UHBR-Highlift-Configuration. 54th AIAA Aerospace Sciences Meeting, 2016-01-04 - 2016-01-08, San Diego, California, USA. doi: 10.2514/6.2016-0763.

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Kurzfassung

It is well known that a high bypass-ratio (BPR) is necessary for efficiency enhancement of commercial aircraft engines. This can also be seen in the properties of the current re-engined midrange aircraft. Compared to their predecessors (BPR � 5 to 6), the new generation of mid-range aircraft with about 150 to 200 seats feature a take-o� BPR of �10 to 12. A frequently studied but as yet not adopted technology uniquely aimed at these types of engines is the variable area fan nozzle (VAFN). This concept allows an adjustment of the engine operating point and the nozzle flow via a variable nozzle geometry. Previous studies show that it can eliminate flutter problems and provide an additional degree of freedom in optimizing the thermodynamic e�ciency of an aircraft engine. But what is the effect of the employment of these concept on the external aerodynamics and hence on the e�ciency of the whole aircraft? This is discussed in the present paper for a VAFN-layout utilized for wind-tunnel testing that uses a mere translative adjustment of the nacelle aftbody for changing the nozzle area. The CFD-results for several VAFN-settings of two high-lift configurations with a close coupled UHBR-TPS engine (BPR � 15 to 20) show an impact on the overall airframe lift and drag due to the jet flow, differing from that of a fixed nozzle engine. The comparison with the fixed nozzle engine also shows different flow conditions at the engine intake. The discussion of the outcomes is done by including the estimation of the impact on fan aerodynamics and the produced thrust.

elib-URL des Eintrags:https://elib.dlr.de/109501/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Investigation of the impact of a Variable Area Fan Nozzle on the overall performance of an UHBR-Highlift-Configuration
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Ritter, Sebastiansebastian.ritter (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Schriever, RaimundRaimund.Schriever (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:Januar 2016
Referierte Publikation:Ja
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
DOI:10.2514/6.2016-0763
Status:veröffentlicht
Stichwörter:Variable area fan nozzle VAFN UHBR Low-Speed MOVE.ON
Veranstaltungstitel:54th AIAA Aerospace Sciences Meeting
Veranstaltungsort:San Diego, California, USA
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:4 Januar 2016
Veranstaltungsende:8 Januar 2016
Veranstalter :AIAA
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Flugzeuge
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Aircraft Research
DLR - Teilgebiet (Projekt, Vorhaben):L - Simulation und Validierung (alt)
Standort: Braunschweig
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > Transportflugzeuge
Entwicklungsbetrieb > Entwicklung und Prüfung
Hinterlegt von: Ritter, Sebastian
Hinterlegt am:13 Dez 2016 10:00
Letzte Änderung:24 Apr 2024 20:14

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