Comparative analysis of the influence of turbulence models on the description of the nitrogen oxides formation during the combustion of swirling pulverized coal flow


Тип публикации: статья из журнала

Год издания: 2016

Идентификатор DOI: 10.1088/1742-6596/754/11/112006

Ключевые слова: Coal, Combustion, Fluid dynamics, Heat radiation, Heat transfer, Hydrodynamics, Lagrange multipliers, Nitrogen oxides, Oceanography, Optical properties, Pulverized fuel, Reynolds number, Turbulence models, Comparative analysis, Incompressible liquids, Interfacial interaction, Reynolds stress models, Root mean square values, Spherical harmonics method, SST turbulence models, Thermal radiation transfer, Coal combustion

Аннотация: The paper presents the results of numerical research on the influence of the two- parametric k-?, and k-? SST turbulence models as well as Reynolds stress model (RSM) on the description of the nitrogen oxides formation during the combustion of pulverized coal in swirling flow. For the numerical simulation of turbulent flow of an inПоказать полностьюcompressible liquid, we used the Reynolds equation taking into account the interfacial interactions. To solve the equation of thermal radiation transfer, the P1 approximation of spherical harmonics method was employed. The optical properties of gases were described based on the sum of gray gases model. To describe the motion of coal particles we used the method of Lagrange multipliers. Burning of coke residue was considered based on diffusion - kinetic approximation. Comparative analysis has shown that the choice of turbulence model has a significant impact on the root mean square (RMS) values of the velocity and temperature pulsation components. This leads to significant differences in the calculation of the nitrogen oxides formation process during the combustion of pulverized coal. © Published under licence by IOP Publishing Ltd.

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Журнал: All-Russian Conference with the School for Young Scientists Thermophysics and Physical Hydrodynamics 2016, TPH 2016 (19 September 2016 through 25 September 2016

Выпуск журнала: Vol. 754, Is. 11

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