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Design and Evaluation of a Zero Mass Flow Liner

Burgmayer, Ralf und Bake, Friedrich und Enghardt, Lars (2022) Design and Evaluation of a Zero Mass Flow Liner. In: 28th AIAA/CEAS Aeroacoustics Conference, 2022. American Institute of Aeronautics and Astronautics, Inc.. 28th AIAA/CEAS Aeroacoustics 2022 Conference, 2022-06-14 - 2022-06-17, Southampton, England. doi: 10.2514/6.2022-2820. ISBN 978-162410664-4.

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Offizielle URL: https://arc.aiaa.org/doi/10.2514/6.2022-2820

Kurzfassung

In this study, the concept of a Zero Mass Flow Liner is evaluated. The concept enables impedance control by the induction of periodic bias flow through the perforated facing sheet of the liner. The periodic bias flow is generated by a secondary high amplitude acoustic actuation. By means of the periodic bias flow, the liner can be tuned to different operating points in a given range of grazing flow velocities. The equivalent fluid impedance model for perforated plates is modified to account for the effects of periodic bias flow and grazing flow. An optimization routine, based on a genetic algorithm, is implemented. The method is applicable to any liner concept and uses the impedance of the lined surface as boundary condition in a numerical simulation. Thereby, a set of liner parameters is derived in order to obtain the desired damping characteristics. Based on the results of the optimization, a Zero Mass Flow Liner is manufactured and consequently evaluated experimentally. The damping characteristics are evaluated in form of the dissipated energy along the lined surface. Prediction and measurements show agreement. The Zero Mass Flow Liner delivers broad band dissipation of high peak value over a range of grazing flow Mach numbers. Under grazing flow conditions, the effect of periodic bias flow is reduced. This poses high energy requirements in high Mach number flow regimes which might restrict the applicability of the Zero Mass Flow concept to grazing flows of low Mach numbers.

elib-URL des Eintrags:https://elib.dlr.de/187528/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Design and Evaluation of a Zero Mass Flow Liner
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Burgmayer, RalfRalf.Burgmayer (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Bake, FriedrichFriedrich.Bake (at) bam.dehttps://orcid.org/0000-0002-3235-428XNICHT SPEZIFIZIERT
Enghardt, LarsLars.Enghardt (at) dlr.deNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:13 Juni 2022
Erschienen in:28th AIAA/CEAS Aeroacoustics Conference, 2022
Referierte Publikation:Ja
Open Access:Ja
Gold Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Nein
DOI:10.2514/6.2022-2820
Verlag:American Institute of Aeronautics and Astronautics, Inc.
Name der Reihe:AIAA Acoustic Liners
ISBN:978-162410664-4
Status:veröffentlicht
Stichwörter:aircraft, noise reduction, acoustic liner, high sound pressure amplitudes, grazing flowm, bias flow, impedance model, numerical simulation, experimental validation
Veranstaltungstitel:28th AIAA/CEAS Aeroacoustics 2022 Conference
Veranstaltungsort:Southampton, England
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:14 Juni 2022
Veranstaltungsende:17 Juni 2022
Veranstalter :American Institute of Aeronautics and Astronautics, Inc.
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Umweltschonender Antrieb
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L CP - Umweltschonender Antrieb
DLR - Teilgebiet (Projekt, Vorhaben):L - Triebwerkskonzepte und -integration
Standort: Berlin-Charlottenburg
Institute & Einrichtungen:Institut für Antriebstechnik > Triebwerksakustik
Hinterlegt von: Burgmayer, Ralf
Hinterlegt am:25 Jul 2022 11:29
Letzte Änderung:24 Apr 2024 20:48

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