Моделювання процесів теплообміну в топках водотрубних котлів дКВР(де)-10/14
Journal Title: Вісник Національного університету "Львівська політехніка". Серія "Теорія та практика будівництва" - Year 2016, Vol 0, Issue 844
Abstract
Тhe results of a numerical study of heat transfer in water-tube boiler DKVR(DE)-10/14 furnace are provided. The geometric model of the inner cavity of furnaces and burners is constructed with help of boiler and burner GMG-7 drawings. The mathematical model of radiate and convective heat transfer with gravity in the gas path of the boiler on the basis of the Reynolds averaged incompressible Navier – Stokes equations is formed. The model incorporate continuity, momentum, energy and chemical components transfer equations of the gas mixture stored in a stationary manner. Model equations are locked by Newton’s law for a tensor pressure, Fourier law for heat flow, Fick law for mass flow, the Clapeyron law for the thermodynamic state of a gas mixture, k-ε Launder and Spalding turbulence model and Magnussen and Hjertager turbulent combustion model. Such results of numerical simulations as the gas flow temperature distribution in the boiler specific sections and the surface specific heat fluxe distribution on the furnace walls are presented. Determined the structure of the torch and the zone with the maximum temperature and heat. The calculations are also performed for the furnace to a dead-end tubular secondary emitter. It is shown that radiation heat flux density is increased by 15–20 %, the flue gas temperature is reduced to 970°C.
Authors and Affiliations
A. Redko, S. Pavlovskiiy, N. Kulikova, V. Kostyuk, O. Kirilash
Keywords
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