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- Title
Observation of large-scale hydrodynamic structures in a vortex tube and the Ranque effect.
- Authors
Arbuzov, V. A.; Dubnishchev, Yu. N.; Lebedev, A. V.; Pravdina, M. Kh.; Yavorskiı, N. I.
- Abstract
The existence of large-scale structures in the form of a vortical double helix in a swirling Ranque flow is observed for the first time. The structure of the vortical double helix is visualized in real time by the method of Hilbert bichromatic filtering. The experimental result is interpreted on the basis that the most probable physical mechanism for the spatial energy separation in the gas flow (i.e., for the so-called Ranque effect) is viscous heating of the gas in a thin boundary layer at the walls of the vortex chamber and the adiabatic cooling at the center owing to the formation of an intense vortex braid near the axis.
- Subjects
HYDRODYNAMICS; VORTEX tubes
- Publication
Technical Physics Letters, 1997, Vol 23, Issue 12, p938
- ISSN
1063-7850
- Publication type
Article
- DOI
10.1134/1.1261939