We perform Large-eddy simulations of an annular swirling turbulent jet for S = 0, S = 0.3 and S = 1, where S is swirl number. The Reynolds number based on the bulk velocity in the feeding channel and the outer diameter was 8900. The analysis showed that the region around the stagnation point in the end of the recirculation zone has a high level of turbulent kinetic energy. The length of the recirculation zone decreases in case for low swirl (S = 0.3) compared to the non-rotating case, while for the higher rotation rate (S = 1) the recirculation bubble becomes enormously long. Spectral analysis showed two peaks corresponding to the Kelvin-Helmholtz instability and some low-frequency oscillations of the recirculating zone.
|Number of pages||6|
|Journal||Journal of Physics: Conference Series|
|Publication status||Published - 19 Mar 2018|
|Event||6th International Conference on Heat and Mass Transfer and Hydrodynamics in Swirling Flows - Novosibirsk, Russian Federation|
Duration: 21 Nov 2017 → 23 Nov 2017
- COHERENT STRUCTURES
- VORTEX BREAKDOWN