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Large-eddy simulati...
Large-eddy simulation of three-dimensional vortical structures for an impinging transverse jet in the near region
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- Fan, Jing-yu, 1972 (författare)
- Shanghai University
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- Zhang, Yan, 1976 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Wang, D. Z. (författare)
- Shanghai University
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(creator_code:org_t)
- 2007-06-01
- 2007
- Engelska.
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Ingår i: Shuidonglixue Yanjiu yu Jinzhan / Journal of Hydrodynamics Ser. A. - : Springer Science and Business Media LLC. - 1000-4874. ; 19:3, s. 314-321
- Relaterad länk:
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http://dx.doi.org/10...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The three-dimensional vortical structures for an impinging transverse jet in the near region were numerically investigated by means of Large-Eddy Simulation (LES). The LES results reproduced the skewed jet shear layer vortices close to the jet nozzle and the scarf vortex in the near-wall zone, in good agreement with the experimental observations. Different vortical modes in the skewed jet shear layer close to the jet nozzle were identified depending upon the velocity ratio between jet and crossflow, namely changing from an approximately axisymmetric mode to a helical one with the velocity ratios varying from 20 to 8. Moreover, the scarf vortex wrapped around the impinging jet in the near-wall zone showed distinct asymmetry with regard to its bilateral spiral legs within the near region. And the entrainment of the ambient crossflow fluids by the scarf vortex in the near-wall zone was appreciably influenced by its asymmetry and in a large part occurred on the surface of the spiral roller structures in the course of spreading downstream.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering (hsv//eng)
Nyckelord
- Large-Eddy Simulation (LES)
- crossflow
- vortical
- structure
- entrainment
- impinging jet
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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