Wagner, Alexander und Martinez Schramm, Jan und Dittert, Christian und C. B. Sousa, Victor und Patel, Danish und Scalo, Carlo (2018) Experimental and numerical acoustic characterization of ultrasonically absorptive porous materials. In: 12th AIAA/ASME Joint Thermophysics and Heat Transfer Conference, 2018. AIAA Aviation and Aeronautics Forum and Exposition 2018, 2018-06-25 - 2018-06-29, Atlanta, USA. doi: 10.2514/6.2018-2948.
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Offizielle URL: http://www.aiaa.org/EventDetail.aspx?id=15032387957
Kurzfassung
The paper addresses the experimental and numerical acoustic characterization of ultrasonically absorptive porous materials with random microstructure such as carbon fiber reinforced carbon ceramic C/C or C/C-SiC. The present study carries on a preceding experimental study of the authors by improving and extending the established experimental method and by conducting complementary numerical studies. The latter uses a new inverse Helmholtz Solver associated with an incident planar acoustic wave to estimate the complex acoustic impedance at the open surface of an arbitrarily shaped cavity. The experimental approach is complemented by high speed schlieren visualization and Mach-Zehnder Interferometer measurements to qualitatively and quantitatively assess the interaction between an ultrasonic wave packet and a porous surface. The main emphasis of the paper is to assess the potential and the limitations of the experimental methods and the comparison of the experimental results to the numerically obtained absorption characteristics.
elib-URL des Eintrags: | https://elib.dlr.de/119025/ | ||||||||||||||||||||||||||||
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Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||||||||||||||||||||||
Titel: | Experimental and numerical acoustic characterization of ultrasonically absorptive porous materials | ||||||||||||||||||||||||||||
Autoren: |
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Datum: | 2018 | ||||||||||||||||||||||||||||
Erschienen in: | 12th AIAA/ASME Joint Thermophysics and Heat Transfer Conference, 2018 | ||||||||||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||||||||||
Open Access: | Ja | ||||||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||||||||||
In ISI Web of Science: | Nein | ||||||||||||||||||||||||||||
DOI: | 10.2514/6.2018-2948 | ||||||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||||||
Stichwörter: | Hypersonic Boundary-Layer Transition, HEG, ultrasonically absorptive coating, porous materials, acoustic absorption | ||||||||||||||||||||||||||||
Veranstaltungstitel: | AIAA Aviation and Aeronautics Forum and Exposition 2018 | ||||||||||||||||||||||||||||
Veranstaltungsort: | Atlanta, USA | ||||||||||||||||||||||||||||
Veranstaltungsart: | internationale Konferenz | ||||||||||||||||||||||||||||
Veranstaltungsbeginn: | 25 Juni 2018 | ||||||||||||||||||||||||||||
Veranstaltungsende: | 29 Juni 2018 | ||||||||||||||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||||||||||
HGF - Programm: | Raumfahrt | ||||||||||||||||||||||||||||
HGF - Programmthema: | Raumtransport | ||||||||||||||||||||||||||||
DLR - Schwerpunkt: | Raumfahrt | ||||||||||||||||||||||||||||
DLR - Forschungsgebiet: | R RP - Raumtransport | ||||||||||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | R - Raumfahrzeugsysteme - Anlagen u. Messtechnik (alt) | ||||||||||||||||||||||||||||
Standort: | Göttingen , Stuttgart | ||||||||||||||||||||||||||||
Institute & Einrichtungen: | Institut für Aerodynamik und Strömungstechnik > Raumfahrzeuge, GO Institut für Bauweisen und Strukturtechnologie > Raumfahrt - System - Integration | ||||||||||||||||||||||||||||
Hinterlegt von: | Bachmann, Barbara | ||||||||||||||||||||||||||||
Hinterlegt am: | 06 Jul 2018 11:38 | ||||||||||||||||||||||||||||
Letzte Änderung: | 24 Apr 2024 20:23 |
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