Rein, Martin (2008) Cold spray deposition: A study of supersonic jet impingement. Center of Excellence for Research and Education on Complex Functional Mechanical Systems Seminar, 2008-02-20, Kyoto (Japan). (nicht veröffentlicht)
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Kurzfassung
Transonic flow phenomena and the generation of sound occurring during the impingement of a supersonic free jet on a plate have been studied both, experimentally and numerically. This happened under conditions typical of the cold spray deposition process. Therefore, also particle-laden jets were considered. Under certain conditions a recirculation bubble is formed in the shock layer ahead of the plate. Numerical computations of this flow that have been performed with the DLR TAU-code, are compared with shadowgraphs. Experimental results obtained with a newly developed multi-exposure method combined with synchronized pressure measurements, show that the formation of recirculation bubbles is typically connected with self-excited flow oscillations. Based on a spectral analysis, different mechanisms of self-excited oscillations are discussed and compared with related phenomena reported in the literature. The importance of flow oscillations on the behaviour of a particle cloud that is formed ahead of the plate in the case of two-phase flows, will also be explained.
elib-URL des Eintrags: | https://elib.dlr.de/53629/ | ||||||||
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Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||
Titel: | Cold spray deposition: A study of supersonic jet impingement | ||||||||
Autoren: |
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Datum: | 20 Februar 2008 | ||||||||
Open Access: | Nein | ||||||||
Gold Open Access: | Nein | ||||||||
In SCOPUS: | Nein | ||||||||
In ISI Web of Science: | Nein | ||||||||
Status: | nicht veröffentlicht | ||||||||
Stichwörter: | supersonic jet, impingement, sound generation, transonic flows, shock waves | ||||||||
Veranstaltungstitel: | Center of Excellence for Research and Education on Complex Functional Mechanical Systems Seminar | ||||||||
Veranstaltungsort: | Kyoto (Japan) | ||||||||
Veranstaltungsart: | Andere | ||||||||
Veranstaltungsdatum: | 20 Februar 2008 | ||||||||
Veranstalter : | The 21st Centuary COE Program | ||||||||
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 - Militärische Technologien (alt) | ||||||||
Standort: | Göttingen | ||||||||
Institute & Einrichtungen: | Institut für Aerodynamik und Strömungstechnik > Hochgeschwindigkeitskonfigurationen | ||||||||
Hinterlegt von: | Rein, Prof.Dr. Martin | ||||||||
Hinterlegt am: | 07 Apr 2008 | ||||||||
Letzte Änderung: | 24 Apr 2024 19:16 |
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