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

All-Russian Conference with the School for Young Scientists “Thermophysics and Physical Hydrodynamics –2016”

Kuznetsov, V.^1 ; Chernetskaya, N.^2 ; Chernetskiy, M.^1,2

Siberian Federal University, 79 Svobodny, Krasnoyarsk

660041, Russia^1

Kutateladze Institute of Thermophysics, Novosibirsk

630090, Russia^2

关键词: Comparative analysis;    Incompressible liquids;    Interfacial interaction;    Reynolds stress models;    Root mean square values;    Spherical harmonics method;    SST turbulence models;    Thermal radiation transfer;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/754/11/112006/pdf
DOI  :  10.1088/1742-6596/754/11/112006

来源: IOP

【 摘 要 】

The paper presents the results of numerical research on the influence of the two- parametric k-, and k-ω 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 incompressible 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.