INVESTIGATION OF CHARACTERISTICS OF CONCENTRATED VORTEX IN THE TANGENTIAL CHAMBER USING PIV TECHNIQUE AND COMPUTER SIMULATION

The work is focused on a detailed study of the characteristics of the vortex flow in the chamber tangential type, modeling, in particular, the common furnace coal-fired boilers. It was shown that the vortex structure formed in the chamber with diaphragm is a vortex filament with the relative radius r_m / R = 0,1 and a length of about the size of the camera l / R = 6. During researches it was measured the velocity field and vortices using a static method of diagnosis flow PIV, and performed the verification of calculated data obtained using the LES and DES methods for simulation of turbulent flows in the CFD package Star CCM +. Calculated velocity profiles and vortex precession frequency agree with experimental data, which indicates the correctness of chosen approach of modeling of turbulent swirling flow.

Keywords:
vortex structures, vortex filament, swirl flow, turbulence modeling, combustion chamber. 
УДК 532.527(2)

INVESTIGATION OF CHARACTERISTICS OF CONCENTRATED VORTEX IN THE TANGENTIAL CHAMBER USING PIV TECHNIQUE AND COMPUTER SIMULATION