Pelz, P. F. ; Taubert, Paul (2018)
Vortex-Induced Transient Stall.
In: Archive of Applied Mechanics
doi: 10.1007/s00419-018-1468-5
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
This study analyzes the induced flow by a coaxial vortex ring inside a circular tube applying vortex theory and potential flow theory. The vortex ring itself is generated by bound vortices rotating with the angular frequency Ω. Two results emerge out of the analytic research: first it is shown that induction causes the rotation of the vortex ring. It rotates at the sub-synchronous frequency Ωind<0.5Ω. Second, the ring vortex itself induces an axial velocity at the tube wall. Superimposed with the axial main flow, this results in a stagnation point. Since the vortex strength increases in time, the stagnation point moves upstream. This kinematic effect may falsely be interpreted as a dynamic boundary layer separation. Hence, the results may give new insights into transient stall phenomena in axial turbomachinery.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2018 |
| Autor(en): | Pelz, P. F. ; Taubert, Paul |
| Art des Eintrags: | Bibliographie |
| Titel: | Vortex-Induced Transient Stall |
| Sprache: | Englisch |
| Publikationsjahr: | 1 Oktober 2018 |
| Verlag: | Springer |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Archive of Applied Mechanics |
| DOI: | 10.1007/s00419-018-1468-5 |
| URL / URN: | https://link.springer.com/article/10.1007/s00419-018-1468-5 |
| Kurzbeschreibung (Abstract): | This study analyzes the induced flow by a coaxial vortex ring inside a circular tube applying vortex theory and potential flow theory. The vortex ring itself is generated by bound vortices rotating with the angular frequency Ω. Two results emerge out of the analytic research: first it is shown that induction causes the rotation of the vortex ring. It rotates at the sub-synchronous frequency Ωind<0.5Ω. Second, the ring vortex itself induces an axial velocity at the tube wall. Superimposed with the axial main flow, this results in a stagnation point. Since the vortex strength increases in time, the stagnation point moves upstream. This kinematic effect may falsely be interpreted as a dynamic boundary layer separation. Hence, the results may give new insights into transient stall phenomena in axial turbomachinery. |
| Fachbereich(e)/-gebiet(e): | 16 Fachbereich Maschinenbau 16 Fachbereich Maschinenbau > Institut für Fluidsystemtechnik (FST) (seit 01.10.2006) 16 Fachbereich Maschinenbau > Institut für Fluidsystemtechnik (FST) (seit 01.10.2006) > Kavitation und generische Strömungen in Turbomaschinen |
| Hinterlegungsdatum: | 04 Okt 2018 12:05 |
| Letzte Änderung: | 12 Feb 2020 14:25 |
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