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Validation of a Zonal Approach Computing the Sound Radiation from Lined Ducts

Buske, Clemens und Richter, Christoph und Thiele, Frank und Yu, Chao und Zhuang, Mei (2010) Validation of a Zonal Approach Computing the Sound Radiation from Lined Ducts. AIAA Journal, Vol. 48 (No. 12), Seiten 2899-2908. DOI: 10.2514/1.J050478.

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A zonal approach for the prediction of the far-field radiation from flows in lined ducts is investigated. The approach combines a high-order computational aeroacoustics scheme with the recently developed acoustic intensitybased method for the calculation of far-field radiations. The advantage over the application of an acoustic analogy is the usage of an open control surface for the acoustic input. The capability of the current hybrid approach was validated on the basis of two benchmark cases. One considers the sound radiation from a two-dimensional semiinfinite duct in which a small fraction of the walls close to outlet nozzle is lined. The second problem concerns the sound radiation from a bypass enginelike annular duct with lined and hardwalled configurations of the infinite centerbody and sheared flow conditions. A broadband time-domain impedance boundary condition based on the extended Helmholtz resonator model and the Ingard–Myers boundary condition is implemented in the computational aeroacoustic code to model the acoustic linings. Although mesh refinement may improve the solutions, the good agreements of analytical solutions and numerical results, in particular for the radiation characteristics, verify this approach as an accurate and efficient prediction tool.

Titel:Validation of a Zonal Approach Computing the Sound Radiation from Lined Ducts
AutorenInstitution oder E-Mail-Adresse der Autoren
Buske, ClemensDLR
Richter, ChristophTU Berlin
Thiele, FrankTU Berlin
Yu, ChaoPPG Industries
Zhuang, MeiOhio State University
Datum:12 Dezember 2010
Erschienen in:AIAA Journal
Referierte Publikation:Ja
In Open Access:Nein
In ISI Web of Science:Ja
Band:Vol. 48
DOI :10.2514/1.J050478
Seitenbereich:Seiten 2899-2908
Stichwörter:Computational Aeroacoustics, Duct Flow, Far-Field Sound Prediction
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Starrflügler
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L AR - Starrflüglerforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Simulation & Validierung
Standort: Göttingen
Institute & Einrichtungen:Institut für Antriebstechnik
Hinterlegt von: Clemens Buske
Hinterlegt am:03 Feb 2011 12:00
Letzte Änderung:26 Mär 2013 13:26

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