Stadler, Hannes und Bauknecht, Andre und Siegrist, Silvan und Flesch, Robert und Wolf, Christian C. und van Hinsberg, Nils und Jacobs, Markus (2017) Background‑oriented schlieren imaging of flow around a circular cylinder at low Mach numbers. Experiments in Fluids, 58 (114), Seiten 1-12. Springer Nature. doi: 10.1007/s00348-017-2398-7. ISSN 0723-4864.
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Offizielle URL: https://doi.org/10.1007/s00348-017-2398-7
Kurzfassung
The background-oriented schlieren (BOS) imaging method has, for the first time, been applied in the investigation of the flow around a circular cylinder at low Mach numbers (M < 0.1). The measurements were conducted in the high pressure wind tunnel, Göttingen, with static pressures ranging from 0.1 MPa to 6.0 MPa and covered a range of the Reynolds numbers of 0.1 × 106 ≤ Re ≤ 6.0 × 106. Even at ambient pressure and the lowest Reynolds number investigated, density gradients associated with the flow around the cylinder were recorded. The signal-to-noise ratio of the evaluated gradient field improved with increasing stagnation pressure. The Separation point could easily be identified with this non-intrusive measurement technique and corresponds well to simultaneous surface pressure measurements. The resulting displacement field is in principle of qualitative nature as the observation angle was parallel to the cylinder axis only in a single point of the recorded images. However, it has been possible to integrate the density field along the surface of the cylinder by successive imaging at incremental angular positions around the cylinder. This density distribution has been found to agree well with the pressure measurements and with potential theory where appropriate.
elib-URL des Eintrags: | https://elib.dlr.de/113959/ | ||||||||||||||||||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||||||||||||||
Titel: | Background‑oriented schlieren imaging of flow around a circular cylinder at low Mach numbers | ||||||||||||||||||||||||||||||||
Autoren: |
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Datum: | 17 August 2017 | ||||||||||||||||||||||||||||||||
Erschienen in: | Experiments in Fluids | ||||||||||||||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||||||||||||||
Open Access: | Nein | ||||||||||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||||||||||||||||||
Band: | 58 | ||||||||||||||||||||||||||||||||
DOI: | 10.1007/s00348-017-2398-7 | ||||||||||||||||||||||||||||||||
Seitenbereich: | Seiten 1-12 | ||||||||||||||||||||||||||||||||
Herausgeber: |
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Verlag: | Springer Nature | ||||||||||||||||||||||||||||||||
ISSN: | 0723-4864 | ||||||||||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||||||||||
Stichwörter: | BOS, Windkanal, Zylinder | ||||||||||||||||||||||||||||||||
HGF - Forschungsbereich: | Energie | ||||||||||||||||||||||||||||||||
HGF - Programm: | Erneuerbare Energie | ||||||||||||||||||||||||||||||||
HGF - Programmthema: | Konzentrierende solarthermische Technologien | ||||||||||||||||||||||||||||||||
DLR - Schwerpunkt: | Energie | ||||||||||||||||||||||||||||||||
DLR - Forschungsgebiet: | E SW - Solar- und Windenergie | ||||||||||||||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | E - Neue Wärmeträgerfluide (alt) | ||||||||||||||||||||||||||||||||
Standort: | Jülich | ||||||||||||||||||||||||||||||||
Institute & Einrichtungen: | Institut für Solarforschung > Punktfokussierende Systeme Institut für Aerodynamik und Strömungstechnik > Hubschrauber, GO Institut für Aeroelastik > Aeroelastische Experimente Deutsch-Niederländische Windkanäle | ||||||||||||||||||||||||||||||||
Hinterlegt von: | Uhlig, Tamara | ||||||||||||||||||||||||||||||||
Hinterlegt am: | 19 Sep 2017 14:59 | ||||||||||||||||||||||||||||||||
Letzte Änderung: | 02 Nov 2023 13:30 |
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