Tymoshchenko O. Development of thermophysical fundamentals for gas combustion in microjet burner devices of low power

The dissertation is devoted to the development of the main principals of the thermophysics of gas combustion in low-power burners. A complex of computational and experimental studies of the working processes of such burners with various modifications of cylindrical flame stabilizers - smooth, with annular rectangular niches on the side surfaces of the stabilizers and with flow turbulators on their stalling edges has been performed. Special attention is paid to the comparative analysis of transfer processes in burners with flat and smooth cylindrical flame stabilizers. The results of CFD modeling of working processes for a series of burners with smooth flame stabilizers with a power from 30 to 200 kW are presented. A study to establish the regularities of the effect of annular niche cavities on the characteristics of flow, mixture formation of fuel and oxidizer, fuel burnout and formation of temperature fields in the combustion zone was carried out. Comparison of the main parameters of the working processes of the investigated burners in the presence and absence of plate flow turbulators installed on the trailing edges of the flame stabilizers is carried out. Based on the results of the studies performed, the efficient design and operating parameters of various modifications of the series of low-power burners were determined and the corresponding technical solutions were developed. The results of the work were introduced on dryers of shaped elements of the lining of power equipment, boilers such as NIISTU, E-1.0-0.9GN-2, etc.