Simulation of large-scale vortex structures in a model chamber of the tangential type

The work is aimed at studying large-scale helical vortex structures emerging in a high turbulent intensively swirling flow in detail. The paper presents numerical simulation of vortex structures by various methods of turbulence. It is shown that the LES method most accurately describes flows in a chamber with a swirling flow. As a result of studies, a strong influence of the geometric parameters of the chamber on the shape of the vortex structures is shown. Steady-state vortex structures are formed in a chamber with a diaphragmatic outlet, while the vortices perform small-scale oscillations around their own axis, called the precession of a vortex core.