Abstract
This paper presents the results of calculations of velocity and temperature fields in the radiation chamber of an energy-intensive technological tubular oven during the combustion of methane in air using acoustic burners of floor flame. The calculation method is based on the joint numerical solution of difference analogs of three-dimensional equations of energy transfer by radiation, convection and turbulent thermal conductivity, the movement of flue gases and the methane combustion model in the air. The radiation selectivity of flue gases is taken into account using a six-band model. The paper contains a diagram showing the organization of a three-dimensional modelling of acoustic burners. It also represents the isotherms of combustion products, the lines of the velocity vectors in the radiation chamber, distributions of surface densities of heat fluxes to the heating surface.
Highlights
IntroductionThe main structural elements of radiation chambers of tubular ovens in petrochemical industry (conversion, reforming, pyrolysis, etc.) work at the limit of the possibilities of structural materials
The main structural elements of radiation chambers of tubular ovens in petrochemical industry work at the limit of the possibilities of structural materials
In our opinion for solving these problems it is better to use the differential method based on mathematical models of interrelated processes of radiation-convective heat transfer, turbulent movement of combustion products and burning fuel in the combustion chamber
Summary
The main structural elements of radiation chambers of tubular ovens in petrochemical industry (conversion, reforming, pyrolysis, etc.) work at the limit of the possibilities of structural materials. In order to create energy-saving technologies and ensure the reliability of furnace structures it is necessary to analyze the effect of numerous operating and structural parameters on a complex heat and mass transfer process in the radiation chamber of the tubular oven. In our opinion for solving these problems it is better to use the differential method based on mathematical models of interrelated processes of radiation-convective heat transfer, turbulent movement of combustion products and burning fuel in the combustion chamber. The possibility of thermal calculation of tube ovens with acoustic burners of a floor flame using the differential method [3] is shown in our works [1, 2]. The paper [5] highlights the main achievements in computational fluid dynamics, discusses advanced scientific innovations
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