The Calculated Estimate of Pressure Oscillations Behind the Power Plant Combustion Chamber Burner

The aim of the study was to determine the fluctuation characteristics of the burner. Calculations were carried out in the ANSYS Fluent software using Large Eddy Simulation (LES) approach. Calculations were performed on four different modes with different pressure drop on the burner. Then at two sections were calculated changes of swirl and Strouhal numbers from the Reynolds number. The results allowed to develop an approach to determining the fluctuation characteristics of the combustion chamber burner devices at the design stage. The calculated technique can be used to estimate the amplitude-frequency characteristics of the burner and forming its design changes in order to eliminate oscillations in the combustion chamber as a higher order acoustic system.