Generation of Large-Scale High-Velocity Vortex Rings by Initiating an Explosive
- Authors: Akhmetov D.G.1, Kotelnikova M.S.1, Nikulin V.V.1, Plastinin A.V.1, Chashnikov E.A.1, Kop’ev V.F.2, Zaitsev M.Y.2
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Affiliations:
- Lavrentyev Institute of Hydrodynamics, Siberian Branch
- Central Aerohydrodynamic Institute
- Issue: Vol 55, No 4 (2019)
- Pages: 390-394
- Section: Article
- URL: https://ogarev-online.ru/0010-5082/article/view/153258
- DOI: https://doi.org/10.1134/S0010508219040038
- ID: 153258
Cite item
Abstract
By initiating explosive charges in a cylindrical tube with one end face being plugged, vortex rings with diameters of the order of 1 m and initial velocity of motion greater than 100 m/s are obtained. Such rings emit a clearly heard acoustic signal, which is of interest for studying generation of acoustic waves by vortices and scaling mechanisms of noise generation. Vortex rings are generated due to exhaustion of a high-velocity gas jet formed after shock wave propagation over the tube. The measured vortex velocities are found to be weakly dependent on the explosive mass, i.e., as the mass increases, the fraction of energy transformed to the vortex ring energy becomes smaller.
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About the authors
D. G. Akhmetov
Lavrentyev Institute of Hydrodynamics, Siberian Branch
Email: nikulin@hydro.nsc.ru
Russian Federation, Novosibirsk, 630090
M. S. Kotelnikova
Lavrentyev Institute of Hydrodynamics, Siberian Branch
Email: nikulin@hydro.nsc.ru
Russian Federation, Novosibirsk, 630090
V. V. Nikulin
Lavrentyev Institute of Hydrodynamics, Siberian Branch
Author for correspondence.
Email: nikulin@hydro.nsc.ru
Russian Federation, Novosibirsk, 630090
A. V. Plastinin
Lavrentyev Institute of Hydrodynamics, Siberian Branch
Email: nikulin@hydro.nsc.ru
Russian Federation, Novosibirsk, 630090
E. A. Chashnikov
Lavrentyev Institute of Hydrodynamics, Siberian Branch
Email: nikulin@hydro.nsc.ru
Russian Federation, Novosibirsk, 630090
V. F. Kop’ev
Central Aerohydrodynamic Institute
Email: nikulin@hydro.nsc.ru
Russian Federation, Moscow, 107005
M. Yu. Zaitsev
Central Aerohydrodynamic Institute
Email: nikulin@hydro.nsc.ru
Russian Federation, Moscow, 107005
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