Two spiral vortex breakdowns in confined swirling flow
Two different scenarios of spiral vortex breakdown are observed experimentally and further investigated numerically in the swirl flow into a conical diffuser. The primary spiral vortex breakdown is observed near the inlet of the conical diffuser in cases of the cone angle β > 3 °. The secondary s...
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| Veröffentlicht in: | Physics of fluids (1994) 2023-06, Vol.35 (6) |
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| Hauptverfasser: | , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | Two different scenarios of spiral vortex breakdown are observed experimentally and further investigated numerically in the swirl flow into a conical diffuser. The primary spiral vortex breakdown is observed near the inlet of the conical diffuser in cases of the cone angle
β
>
3
°. The secondary spiral vortex breakdown occurs at the exit of the cone at
β
≤
3
°. Also, the coexistence of two spiral vortices is observed. For the first time, we have visualized and explained the reasons of these observations. |
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| ISSN: | 1070-6631 1089-7666 |
| DOI: | 10.1063/5.0154809 |