МЕТОД ПОВЕРХНОСТЕЙ РАВНЫХ РАСХОДОВ В СТРОИТЕЛЬНОЙ АЭРОДИНАМИКЕ
МЕТОД ПОВЕРХНОСТЕЙ РАВНЫХ РАСХОДОВ В СТРОИТЕЛЬНОЙ АЭРОДИНАМИКЕ
DOI:
https://doi.org/10.22337/2587-9618-2024-20-1-57-67Ключевые слова:
высотные сооружения, численные методы расчета, закрученные течения, смешение газовАннотация
The problem of combustion of natural fuels is now an extremely important environmental issue. Flue gas emitted into the atmosphere has a negative impact on the environment. The consequences can range from precipitation containing acidic compounds to increased levels of lung disease in the population. A solution to this problem of fuel combustion in thermal power plants can be a design called a combined high-rise structure. It combines two components: the cooling tower and the chimney itself. The study of the flow gases nature in such a structure is an extremely important task, since the process of mixing the smoke with the additionally supplied air in the pipe determines the concentration of the emission of harmful substances into the atmosphere. This article is devoted to the numerical study of gas dynamics in the structures under consideration. A generalization of equal rate surfaces method to describe the internal aerodynamics of the structure is presented. The problem statement is based on the viscous compressible gas model. The flow is described by the Navier-Stokes system of equations, which is written in a parabolic form and supplemented by an algebraic turbulence model. The numerical solution is carried out by the finite difference method. Various variants of the structure geometry and initial conditions are considered. The favorable effect of the initial swirling of the flow on the intensive mixing of flue gases and the decrease in the concentration of harmful substances at the outlet of the chimney was noted. Based on this research, recommendations for the design and profiling of structures under construction have been developed.
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