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2019•Journal of Physics Conference SeriesOpen access

Large eddy simulation of the vortex breakdown in a turbulent swirling jet

K I Borynyak

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Abstract

Abstract The paper presents the results of Large eddy simulation of a free swirling jet with Reynolds number Re = 104 for different swirl numbers. The swirl is organized via the rotation of the nozzle. The case has been divided onto two parts: rotating tube with honeycomb section using dynamic mesh and jet simulation with rotating nozzle using the initial conditions obtained in first part. Simulations were carried for six swirl numbers: 0, 0.15, 0.225, 0.3, 0.46, 0.63. The vortex breakdown with a central recirculation zone formation is observed in the last case.

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Abstract The paper presents the results of Large eddy simulation of a free swirling jet with Reynolds number Re = 104 for different swirl numbers. The swirl is organized via the rotation of the nozzle. The case has been divided onto two parts: rotating tube with honeycomb section using dynamic mesh and jet simulation with rotating nozzle using the initial conditions obtained in first part. Simulations were carried for six swirl numbers: 0, 0.15, 0.225, 0.3, 0.46, 0.63. The vortex breakdown with a central recirculation zone formation is observed in the last case.

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Available abstract

Abstract The paper presents the results of Large eddy simulation of a free swirling jet with Reynolds number Re = 104 for different swirl numbers. The swirl is organized via the rotation of the nozzle. The case has been divided onto two parts: rotating tube with honeycomb section using dynamic mesh and jet simulation with rotating nozzle using the initial conditions obtained in first part. Simulations were carried for six swirl numbers: 0, 0.15, 0.225, 0.3, 0.46, 0.63. The vortex breakdown with a central recirculation zone formation is observed in the last case.

Key concepts: Nozzle, Large eddy simulation, Jet (fluid), Mechanics, Turbulence, Vortex, Reynolds number, Physics

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