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Experimental and numerical studies of the low speed wind tunnel DNW-NWB’s open test section towards an aeroacoustic facility

Ciobaca, Vlad und Melber-Wilkending, Stefan und Wichmann, Georg und Bergmann, Andreas und Küpper, Albert (2012) Experimental and numerical studies of the low speed wind tunnel DNW-NWB’s open test section towards an aeroacoustic facility. In: AIAA Paper 2012-2174. 18th AIAA/CEAS Aeroacoustics Conference (33rd AIAA Aeroacoustics Conference), , 4-6 June 2012, Colorado Springs, Colorado . doi: 10.2514/6.2012-2174.

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Offizielle URL: http://arc.aiaa.org/doi/abs/10.2514/6.2012-2174

Kurzfassung

This paper presents results of experimental and numerical investigations performed in the open-jet of the low speed atmospheric wind tunnel DNW-NWB prior the revision to accommodate a high-performance aeroacoustic test section. The investigations aim to assess the accuracy of the computations for open tunnel test sections and include a basic study of the empty tunnel as well as a study of a complex flow topology, the full 3D high-lift model of Do728 in landing configuration. The basic study addresses aerodynamic measurements of the open-jet flow in the empty tunnel which include pressure distributions along the tunnel axis and in cut planes downstream the rectangular nozzle as well as limited hot-wire measurements for the shear layers. The steady RANS simulations have a computational domain restricted to settling chamber, nozzle, test section and collecting system and are in very good agreement with the experimental findings. The pressure along the tunnel axis which has a bath-tube-shape-like with gradients after the nozzle and before the collector has still place for aerodynamic improvements. The investigations with the 3D high-lift Do728 model are devoted to cross-comparisons with the aerodynamic closed test section setup and to a better understanding of the flow deviations of the open-jet at high angles of attack and high lift force. It is shown that the flow is still well captured by the collecting system and that the numerics predict well the flow physics prior to maximum lift. The implications of this work are discussed related to the latter modification of the DNW-NWB facility to allow accurate aerocoustic testing as well as towards the optimization of the collecting system. First results of the ongoing work to optimize the collector’s geometry are presented.

elib-URL des Eintrags:https://elib.dlr.de/78065/
Dokumentart:Konferenzbeitrag (Paper)
Titel:Experimental and numerical studies of the low speed wind tunnel DNW-NWB’s open test section towards an aeroacoustic facility
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Ciobaca, Vladvlad.ciobaca (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Melber-Wilkending, Stefanstefan.melber (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Wichmann, Georggeorg.wichmann (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Bergmann, Andreasandreas.bergmann (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Küpper, Albertalbert.kuepper (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:2012
Erschienen in:AIAA Paper 2012-2174
Referierte Publikation:Nein
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
DOI:10.2514/6.2012-2174
Status:veröffentlicht
Stichwörter:experiment, low speed wind tunnel, in-tunnel simulations, open test section, RANS, high-lift, DNW-NWB
Veranstaltungstitel:18th AIAA/CEAS Aeroacoustics Conference (33rd AIAA Aeroacoustics Conference),
Veranstaltungsort: Colorado Springs, Colorado
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:4-6 June 2012
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Starrflügler (alt)
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Starrflüglerforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Flugphysik (alt)
Standort: Braunschweig
Institute & Einrichtungen:Institut für Aerodynamik und Strömungstechnik > Transportflugzeuge
Deutsch-Niederländische Windkanäle
Hinterlegt von: Ciobaca, Vlad
Hinterlegt am:09 Aug 2013 14:44
Letzte Änderung:10 Jul 2023 15:00

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