АННОТАЦИЯ
A. TARASOV, О. LYTVYNENKO, I. MУHAYLOVA
A PAPER TITLE PUT HERE WITH TIMES NEW ROMAN 10 A PAPER TITLE PUT HERE WITH TIMES NEW ROMAN 10
ABSTRACT Consideration was given to the known methods that are widely used for computation of the metering characteristics of the openings designed for gas turbine cooling systems. The methods are based on the use of such notions as the flow coefficient and the hydraulic resistance coefficient. The use of the latter is preferable for the design of cooling systems, because it correlates the air rate with the total pressure drop in the channels. To use the flow coefficient for the general cooling system computation algorithm the relation between it and the hydraulic resistance coefficient was established. Due to the fact that the extensive experimental data on the hydraulic resistance of openings are related to noncondensable media the method was developed that enables their use taking into account the compressibility. The method consists in the division of overall losses of the total pressure in the diaphragm into the elements, in particular opening
Modern CFD methods for calculating combustion processes make it possible to take into account changes in temperatures, heat loads, rates of coolants, as well as further changes in fuel quality. To develop the skills of CFD design and understanding of combustion processes among future specialists in thermophysical specialties, work was carried out to simulate the burner device of a waste heat boiler. For the study, the design of the gas burner of the waste heat boiler RB-70-4.0-440, which operates as a part of the power unit at the LLC “Rubezhansky Cardboard and Container Plant” in the city of Rubezhnoe, was selected. When constructing a geometric model, the hydraulic resistance to the flow of the supply and distribution manifolds was taken into account. To simplify the calculations, the problem was carried out in a two-dimensional, axisymmetric formulation. Analyzing the computational combustion models, the Non-Premixe Combustion model was chosen, which made it possible to take into account the entry of fuel and oxidizer into the reaction zone by two different flows, as well as turbulent diffusion flame propagation. Six variants of models were investigated: the first three variants with a flame tube with a solid disc with diameters of 32, 48, 56 mm, the next three variants, had a burner with a discontinuous disk 32 mm in diameter at a distance of 6, 16, 32 mm from the flame tube. As a result of the research, the optimal shape of the burner was chosen, which corresponds to model 4, and provides a high-quality combustion process, as evidenced by the high temperature of the torch and the lowest temperature at the disk. The conducted research gives future masters the skills of modeling combustion processes in power equipment.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.