13 research outputs found
Numerical methods application to study processes in the CFB boilers combustion chambers
This paper presents the application of numerical calculation of a hybrid Euler-Lagrange approach to model the gas-solid flow combined with a combustion process in the CFB boiler that has been resolved by applying the ANSYS FLUENT 14.0. In this work, the numerical modelling of furnace processes at various speeds of airflow supply from below was estimated. For the design speed adopted values of 0.5, 1.5, 2.5 and 5 m/s. The research object is the combustion chamber of boiler unit with CFB, with steam capacity of 230 t/h
The Study of Dynamic Processes in the Boiler Furnace with Circulating Fluidized Bed
The paper presents a numerical simulation of the furnace with a circulating fluidized bed. Numerical study carried out on all volume of the combustion chamber. The results contours of particulate matter concentration and of velocities, as well as a graphical representation of changes in the concentration of particles on the bed height are shown. Simulation performed in Eulerian - Eulerian and Lagrange representation on a 3D model
Numerical Simulation of Physical and Chemical Processes in Fluidized Bed
The paper presents a numerical simulation of the furnace with a circulating fluidized bed. Numerical study carried out for the bottom of the combustion chamber with the varying heights of volume filling. The results contours of particulate matter concentration and of velocities, as well as a graphical representation of changes in the concentration of particles on the bed height are shown. Simulation performed in Eulerian - Eulerian representation on a 2D model
3D CFD simulation of aerodynamics of a 406 MW[t] CFB boiler
Modeling of various processes in CFB boilers (combustion, aerodynamics, hydrodynamics, etc.) is connected with the solution of systems of differential equations with a large number of unknowns that leads to their simplification and, accordingly, affect the quality of the calculation. The work consists of several parts and aims to assess the applicability of some or other mathematical algorithms to obtain a quantitative simulation of processes in power boilers with circulating fluidized bed. In part, presented in this article, the simulation of CFB boiler aerodynamics using ANSYS FLUENT is considered
Study of in-furnace gas-dynamic processes with different design of vortex burners
The paper considers the combustion chamber of the boiler unit designed for burning Ekibastuz coal by vortex burners with opposed wall firing. Since Ekibastuz coal is not highly reactive, and also has a high content of the mineral part, then vortex burners are used for its combustion. The use of standard two-channel burners leads to increased generation of nitrogen oxides, therefore, in this article the combustion processes of burning Ekibastuz coal using multi-channel burners are considered. The studies were carried out using numerical methods
Study of in-furnace gas-dynamic processes with different design of vortex burners
The paper considers the combustion chamber of the boiler unit designed for burning Ekibastuz coal by vortex burners with opposed wall firing. Since Ekibastuz coal is not highly reactive, and also has a high content of the mineral part, then vortex burners are used for its combustion. The use of standard two-channel burners leads to increased generation of nitrogen oxides, therefore, in this article the combustion processes of burning Ekibastuz coal using multi-channel burners are considered. The studies were carried out using numerical methods
Research of parameters of the steam boiler BKZ-220-100 at joint burning of natural gas and low-grade fuel
In this article the research of prospects of use of low-grade brown coal of the Talovsky Deposit of the Tomsk region as fuel for local power is carried out. The study is carried out by checking calculations of the steam boiler BKZ-220-100. The result of the study is to obtain data on the parameters of the boiler during the combustion of brown talovsky coal as the main fuel, as well as in a mixture with natural gas or Kuznetsk coal
Evaluation of burning conditions of high-humidity non-project fuel in chamber furnace based on numerical simulation
Relevance of this research is due to the number of issues of the fuel and energy complex, first of all to depletion of project fuel for many thermal power plants, increase of the cost of imported fuel, including operating costs, and tasks of focusing the region on the use of its own capabilities. Goal of the research: pre-project selection of characteristics of high-humidity lignite from Talovsky deposit on the basis of which we can assess the capabilities of its efficient burning in high power boilers by using numerical simulation of processes in the boiler furnace at several variations of moisture content in original fuel, and consider the necessity of reconstruction of the system of dust preparing, and the reduction of existing layout of burners. Comparison of chemical and physical processes flowing at the combustion of project and non-project fuel helps to develop the base for researches with current technologies of combustion of solid fuel. Research technique: numerical simulation in specific application package FIRE 3D based on Euler-Lagrangian approach, finite-difference method, Β«k-eΒ» turbulence model, P1-approximation spherical-harmonic method and on normative method of thermal design of boilers. The results: allocation of temperature fields in furnace volume, oxygen and solids concentration, aerodynamic structure of flow were obtained. The basis for comparative research of existing technology of solid fuel burning, especially for local low-grade coal, was established. Findings: peak maximum efficacy of burning is at humidity of the working mass of Talovsky coal about 30 %, this fact should be considered at research of different technologies and burning products
Analysis of approaches to numerical modeling of pulverized coal fuel combustion in a turbulent flow
ΠΠΊΡΡΠ°Π»ΡΠ½ΠΎΡΡΡ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΠΎΠ±ΡΡΠ»ΠΎΠ²Π»Π΅Π½Π° Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΠΎΡΡΡΡ ΡΠΎΡΠ½ΠΎΠ³ΠΎ Π²ΠΎΡΠΏΡΠΎΠΈΠ·Π²Π΅Π΄Π΅Π½ΠΈΡ ΠΌΠ°ΡΠ΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΈΠΌΠΈ ΠΌΠΎΠ΄Π΅Π»ΡΠΌΠΈ ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΡΡ
ΠΈΠ·ΠΌΠ΅ΡΠ΅Π½ΠΈΠΉ, ΡΠ°ΠΊ ΠΊΠ°ΠΊ ΡΠΈΡΠ»Π΅Π½Π½ΠΎΠ΅ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ ΡΠΈΡΠΎΠΊΠΎ ΠΏΡΠΈΠΌΠ΅Π½ΡΠ΅ΡΡΡ ΠΊΠ°ΠΊ Π΄Π»Ρ ΡΠ°Π·ΡΠ°Π±ΠΎΡΠΊΠΈ Π½ΠΎΠ²ΡΡ
ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΠΈΠΉ ΡΠΆΠΈΠ³Π°Π½ΠΈΡ ΡΠ²Π΅ΡΠ΄ΠΎΠ³ΠΎ ΡΠΎΠΏΠ»ΠΈΠ²Π°, ΡΠ°ΠΊ ΠΈ Π΄Π»Ρ ΠΌΠΎΠ΄Π΅ΡΠ½ΠΈΠ·Π°ΡΠΈΠΈ ΡΡΡΠ΅ΡΡΠ²ΡΡΡΠΈΡ
ΠΊΠΎΡΠ΅Π»ΡΠ½ΡΡ
Π°Π³ΡΠ΅Π³Π°ΡΠΎΠ². Π ΠΊΠ°ΠΊ ΠΈΠ·Π²Π΅ΡΡΠ½ΠΎ, ΠΏΡΠ΅Π΄ΡΠΊΠ°Π·Π°Π½Π½ΡΠ΅ ΡΠΈΡΠ»Π΅Π½Π½ΡΠΌ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΡ ΠΏΡΠ»Π΅ΡΠ³ΠΎΠ»ΡΠ½ΠΎΠ³ΠΎ ΡΠ°ΠΊΠ΅Π»Π° Π½Π°ΠΏΡΡΠΌΡΡ Π·Π°Π²ΠΈΡΡΡ ΠΎΡ ΡΠΎΠ³ΠΎ, ΠΊΠ°ΠΊ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΡΠ΅ΡΡΡ Ρ
ΠΈΠΌΠΈΡ Π³ΠΎΡΠ΅Π½ΠΈΡ Π² ΡΡΡΠ±ΡΠ»Π΅Π½ΡΠ½ΠΎΠΌ ΠΏΠΎΡΠΎΠΊΠ΅. Π¦Π΅Π»Ρ: ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ ΡΠΎΡΠ½ΠΎΡΡΠΈ Π²ΠΎΡΠΏΡΠΎΠΈΠ·Π²Π΅Π΄Π΅Π½ΠΈΡ ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΡΡ
ΠΈΠ·ΠΌΠ΅ΡΠ΅Π½ΠΈΠΉ Π΄Π»Ρ ΡΠ΅ΡΡΡΠ΅Ρ
ΠΏΠΎΠ΄Ρ
ΠΎΠ΄ΠΎΠ² ΠΊ ΡΠΈΡΠ»Π΅Π½Π½ΠΎΠΌΡ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π²ΠΎΡΠΏΠ»Π°ΠΌΠ΅Π½Π΅Π½ΠΈΡ ΠΈ Π²ΡΠ³ΠΎΡΠ°Π½ΠΈΡ Π³ΠΎΡΡΡΠΈΡ
ΠΊΠΎΠΌΠΏΠΎΠ½Π΅Π½ΡΠΎΠ² ΠΏΡΠ»Π΅ΡΠ³ΠΎΠ»ΡΠ½ΠΎΠ³ΠΎ ΡΠΎΠΏΠ»ΠΈΠ²Π° Π² ΡΡΡΠ±ΡΠ»Π΅Π½ΡΠ½ΠΎΠΌ ΠΏΠΎΡΠΎΠΊΠ΅. ΠΠ±ΡΠ΅ΠΊΡΡ: ΡΠ΅ΠΌΠΏΠ΅ΡΠ°ΡΡΡΡ, ΠΊΠΎΠ½ΡΠ΅Π½ΡΡΠ°ΡΠΈΠΈ Π³Π°Π·ΠΎΠ²ΡΡ
ΠΊΠΎΠΌΠΏΠΎΠ½Π΅Π½ΡΠΎΠ² (CO2, O2, CO ΠΈ NOx), Π°ΠΊΡΠΈΠ°Π»ΡΠ½ΡΠ΅ ΠΈ ΡΠ°Π½Π³Π΅Π½ΡΠΈΠ°Π»ΡΠ½ΡΠ΅ ΠΊΠΎΠΌΠΏΠΎΠ½Π΅Π½ΡΡ ΡΠΊΠΎΡΠΎΡΡΠΈ Π²Π½ΡΡΡΠΈ ΡΠΎΠΏΠΊΠΈ IFRF 2,4 ΠΠΡ. ΠΠ΅ΡΠΎΠ΄Ρ: ΡΡΠ°Π²Π½Π΅Π½ΠΈΠ΅ ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΠΎ ΠΈΠ·ΠΌΠ΅ΡΠ΅Π½Π½ΡΡ
ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠΎΠ² ΠΏΡΠ»Π΅ΡΠ³ΠΎΠ»ΡΠ½ΠΎΠ³ΠΎ ΡΠ°ΠΊΠ΅Π»Π° ΠΈ ΠΏΡΠ΅Π΄ΡΠΊΠ°Π·Π°Π½Π½ΡΡ
ΡΠΈΡΠ»Π΅Π½Π½ΡΠΌ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ. Π§ΠΈΡΠ»Π΅Π½Π½ΠΎΠ΅ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ Π²ΡΠΏΠΎΠ»Π½ΡΠ»ΠΎΡΡ Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΠΏΡΠΎΠ³ΡΠ°ΠΌΠΌΠ½ΠΎΠ³ΠΎ ΠΏΠ°ΠΊΠ΅ΡΠ° ANSYS FLUENT. ΠΠΎΡΠ΅Π½ΠΈΠ΅ ΡΠ³ΠΎΠ»ΡΠ½ΠΎΠΉ ΠΏΡΠ»ΠΈ Π² ΡΠΎΠΏΠΊΠ΅ ΡΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΎ ΠΊΠ°ΠΊ Π΄Π²ΡΡ
ΡΠ°Π·Π½Π°Ρ ΡΡΡΠ±ΡΠ»Π΅Π½ΡΠ½Π°Ρ ΡΠΈΡΡΠ΅ΠΌΠ° ΡΠ΅ΡΠ΅Π½ΠΈΠΉ, ΡΠΎΡΡΠΎΡΡΠ°Ρ ΠΈΠ· Π³Π°Π·ΠΎΠ²ΠΎΠΉ ΠΈ Π΄ΠΈΡΠΊΡΠ΅ΡΠ½ΠΎΠΉ ΡΠ°Π·. Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ. ΠΡΠΎΠ²Π΅Π΄Π΅Π½ΠΎ ΡΠΈΡΠ»Π΅Π½Π½ΠΎΠ΅ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ Π³ΠΎΡΠ΅Π½ΠΈΡ ΠΏΡΠ»Π΅ΡΠ³ΠΎΠ»ΡΠ½ΠΎΠ³ΠΎ ΡΠΎΠΏΠ»ΠΈΠ²Π° Π² ΡΡΡΠ±ΡΠ»Π΅Π½ΡΠ½ΠΎΠΌ ΠΏΠΎΡΠΎΠΊΠ΅ ΡΠ΅ΡΡΡΡΠΌΡ ΡΠ°Π·Π½ΡΠΌΠΈ ΠΏΠΎΠ΄Ρ
ΠΎΠ΄Π°ΠΌΠΈ: ΠΌΠΎΠ΄Π΅Π»ΡΠΌΠΈ ΡΠ°Π²Π½ΠΎΠ²Π΅ΡΠ½ΠΎΠΉ Ρ
ΠΈΠΌΠΈΠΈ Ρ ΠΎΠ΄Π½ΠΎΠΉ ΠΈ Π΄Π²ΡΠΌΡ ΠΏΠ΅ΡΠ΅ΠΌΠ΅Π½Π½ΡΠΌΠΈ ΡΠΌΠ΅ΡΠ΅Π½ΠΈΡ; ΠΌΠΎΠ΄Π΅Π»ΡΡ Β«ΠΎΠ±ΡΡΠ²Π° Π²ΠΈΡ
ΡΡΒ» ΠΈ Π΅Ρ ΠΊΠΎΠΌΠ±ΠΈΠ½Π°ΡΠΈΠ΅ΠΉ Ρ ΠΊΠΈΠ½Π΅ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΌΠΎΠ΄Π΅Π»ΡΡ Π³ΠΎΡΠ΅Π½ΠΈΡ. Π‘ΡΠ°Π²Π½ΠΈΡΠ΅Π»ΡΠ½ΡΠΌ Π°Π½Π°Π»ΠΈΠ·ΠΎΠΌ ΡΠ΅Π·ΡΠ»ΡΡΠ°ΡΠΎΠ² ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ Ρ ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΠΎ ΠΈΠ·ΠΌΠ΅ΡΠ΅Π½Π½ΡΠΌΠΈ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΠ°ΠΌΠΈ ΠΏΡΠ»Π΅ΡΠ³ΠΎΠ»ΡΠ½ΠΎΠ³ΠΎ ΡΠ°ΠΊΠ΅Π»Π° ΡΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ Π²ΡΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½Π½ΡΠ΅ ΠΏΠΎΠ΄Ρ
ΠΎΠ΄Ρ ΠΊ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π³ΠΎΡΠ΅Π½ΠΈΡ ΠΏΡΠ»Π΅ΡΠ³ΠΎΠ»ΡΠ½ΠΎΠ³ΠΎ ΡΠΎΠΏΠ»ΠΈΠ²Π° Π² ΡΡΡΠ±ΡΠ»Π΅Π½ΡΠ½ΠΎΠΌ ΠΏΠΎΡΠΎΠΊΠ΅ Π΄Π΅ΠΌΠΎΠ½ΡΡΡΠΈΡΡΡΡ Π΄ΠΎΠ²ΠΎΠ»ΡΠ½ΠΎ Ρ
ΠΎΡΠΎΡΠ΅Π΅ ΡΠΎΠ²ΠΏΠ°Π΄Π΅Π½ΠΈΠ΅ Ρ ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΡΠΌΠΈ Π΄Π°Π½Π½ΡΠΌΠΈ. ΠΠΎΠ΄Π΅Π»Ρ Β«ΠΎΠ±ΡΡΠ²Π° Π²ΠΈΡ
ΡΡΒ» Π² ΠΊΠΎΠΌΠ±ΠΈΠ½Π°ΡΠΈΠΈ Ρ ΠΊΠΈΠ½Π΅ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΌΠΎΠ΄Π΅Π»ΡΡ Π³ΠΎΡΠ΅Π½ΠΈΡ ΠΈΠΌΠ΅Π΅Ρ ΠΏΡΠ΅ΠΈΠΌΡΡΠ΅ΡΡΠ²ΠΎ Π² ΡΠΎΡΠ½ΠΎΡΡΠΈ, Π° ΠΌΠΎΠ΄Π΅Π»Ρ ΡΠ°Π²Π½ΠΎΠ²Π΅ΡΠ½ΠΎΠΉ Ρ
ΠΈΠΌΠΈΠΈ Ρ ΠΎΠ΄Π½ΠΎΠΉ ΠΏΠ΅ΡΠ΅ΠΌΠ΅Π½Π½ΠΎΠΉ ΡΠΌΠ΅ΡΠ΅Π½ΠΈΡ ΠΈΠΌΠ΅Π΅Ρ ΠΏΡΠ΅ΠΈΠΌΡΡΠ΅ΡΡΠ²ΠΎ Π² ΡΠΊΠΎΡΠΎΡΡΠΈ ΡΡ
ΠΎΠ΄ΠΈΠΌΠΎΡΡΠΈ ΡΠ΅ΡΠ΅Π½ΠΈΡ.The relevance of the research is caused by the need for accurate reproduction of experimental measurements by mathematical models, since numerical simulation is widely used both for the development of new technologies for the combustion of solid fuels and for the modernization of existing boiler units. And as it is known, the parameters of a pulverized coal flame predicted by numerical simulation directly depend on the way the combustion chemistry in a turbulent flow is modeled. The main aim of the research is to study the accuracy of reproduction of experimental measurements for four approaches to the numerical simulation of ignition and burnout of combustible components of pulverized coal fuel in a turbulent flow. Objects: temperatures, concentrations of gas components (CO2, O2, CO and NOx), axial and tangential velocity components inside the IFRF 2.4 MW furnace. Methods: comparison of experimentally measured parameters of a pulverized coal flame and those predicted by numerical simulation. Numerical simulation was performed using the ANSYS FLUENT software package. The combustion of coal dust in the furnace is modeled as a two-phase turbulent flow system consisting of gas and discrete phases. Results. Numerical modeling of the combustion of pulverized coal in a turbulent flow has been carried out using four different approaches: equilibrium chemistry models with one and two mixture fractions; model of Β«eddy dissipationΒ» and its combination with the kinetic model of combustion. A comparative analysis of the simulation results with the experimentally measured parameters of a pulverized coal flame established that all the studied approaches to modeling the pulverized coal combustion in a turbulent flow demonstrate a fairly good agreement with the experimental data. The Β«eddy dissipationΒ» model in combination with the combustion kinetic model has the advantage in accuracy, and the equilibrium chemistry model with one mixture fraction has the advantage in the time of solution convergence
Approaches to computational study of combustion chambers with circulating fluidized bed
ΠΠΊΡΡΠ°Π»ΡΠ½ΠΎΡΡΡ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ. Π ΡΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΡΡ
Π½Π°ΡΡΠ½ΡΡ
ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡΡ
Π²ΡΡΠΈΡΠ»ΠΈΡΠ΅Π»ΡΠ½ΡΠΉ ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½Ρ ΡΠ²Π»ΡΠ΅ΡΡΡ ΠΎΠ΄Π½ΠΈΠΌ ΠΈΠ· Π½Π°ΠΈΠ±ΠΎΠ»Π΅Π΅ ΠΏΡΠΎΠ΄ΡΠΊΡΠΈΠ²Π½ΡΡ
ΡΡΠ΅Π΄ΡΡΠ² ΠΈΠ·ΡΡΠ΅Π½ΠΈΡ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠ° Π·Π°Π΄Π°Ρ, Π² ΠΊΠΎΡΠΎΡΡΡ
ΡΠ΅Π·ΡΠ»ΡΡΠ°Ρ Π·Π°Π²ΠΈΡΠΈΡ ΠΎΡ ΠΎΠ΄Π½ΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΠΎΠ³ΠΎ ΠΏΡΠΎΡΠ²Π»Π΅Π½ΠΈΡ Π°ΡΡΠΎΠ΄ΠΈΠ½Π°ΠΌΠΈΠΊΠΈ, ΡΠ΅ΠΏΠ»ΠΎΠΎΠ±ΠΌΠ΅Π½Π° ΠΈ Π³ΠΎΡΠ΅Π½ΠΈΡ. Π§ΠΈΡΠ»Π΅Π½Π½ΡΠ΅ ΡΠ°ΡΡΠ΅ΡΡ ΠΏΡΠΈ ΡΡΠΎΠΌ ΠΏΠΎΠ·Π²ΠΎΠ»ΡΡΡ Π½Π΅ ΡΠΎΠ»ΡΠΊΠΎ ΠΏΡΠ°Π²ΠΈΠ»ΡΠ½ΠΎ ΠΈΠ½ΡΠ΅ΡΠΏΡΠ΅ΡΠΈΡΠΎΠ²Π°ΡΡ ΡΠΈΠ·ΠΈΡΠ΅ΡΠΊΠΈΠ΅ ΡΠ²Π»Π΅Π½ΠΈΡ, ΡΠΈΠΊΡΠΈΡΡΠ΅ΠΌΡΠ΅ Π½Π° ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΡΡ
ΡΡΡΠ°Π½ΠΎΠ²ΠΊΠ°Ρ
, Π½ΠΎ Π½Π΅ΡΠ΅Π΄ΠΊΠΎ ΠΈ Π΄ΠΎΠΏΠΎΠ»Π½ΠΈΡΡ ΡΡΡΠ΅ΡΡΠ²Π΅Π½Π½ΠΎ Π±ΠΎΠ»Π΅Π΅ Π΄ΠΎΡΠΎΠ³ΠΎΡΡΠΎΡΡΠΈΠΉ ΠΈ ΡΡΡΠ΄ΠΎΠ΅ΠΌΠΊΠΈΠΉ ΡΠΈΠ·ΠΈΡΠ΅ΡΠΊΠΈΠΉ ΠΈΠ»ΠΈ Π½Π°ΡΡΡΠ½ΡΠΉ ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½Ρ ΠΊΠΎΠΌΠΏΡΡΡΠ΅ΡΠ½ΠΎΠΉ ΡΠΈΠΌΡΠ»ΡΡΠΈΠ΅ΠΉ. Π ΡΠ²ΡΠ·ΠΈ Ρ ΡΡΠΈΠΌ Π°ΠΊΡΡΠ°Π»ΡΠ½ΠΎΡΡΡ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½ΠΈΡ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΉ, Π½Π°ΠΏΡΠ°Π²Π»Π΅Π½Π½ΡΡ
Π½Π° ΡΠΎΠ²Π΅ΡΡΠ΅Π½ΡΡΠ²ΠΎΠ²Π°Π½ΠΈΠ΅ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠ² ΡΠΈΡΠ»Π΅Π½Π½ΠΎΠ³ΠΎ Π°Π½Π°Π»ΠΈΠ·Π° ΡΠΎΠΏΠΎΡΠ½ΡΡ
ΠΏΡΠΎΡΠ΅ΡΡΠΎΠ² Π² ΠΊΠΎΡΠ»Π°Ρ
Ρ ΡΠΈΡΠΊΡΠ»ΠΈΡΡΡΡΠΈΠΌ ΠΊΠΈΠΏΡΡΠΈΠΌ ΡΠ»ΠΎΠ΅ΠΌ Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΊΠΎΠΌΠΏΡΡΡΠ΅ΡΠ½ΠΎΠ³ΠΎ ΠΌΠ°ΡΠ΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ, ΡΠ²Π»ΡΠ΅ΡΡΡ Π²Π΅ΡΡΠΌΠ° Π²ΡΡΠΎΠΊΠΎΠΉ Π΄Π»Ρ ΠΎΠ±ΠΎΡΠ½ΠΎΠ²Π°Π½ΠΈΡ ΠΎΡΠ½ΠΎΠ²Π½ΡΡ
ΠΏΡΠΎΠ΅ΠΊΡΠ½ΠΎ-ΠΊΠΎΠ½ΡΡΡΡΠΊΡΠΎΡΡΠΊΠΈΡ
ΠΈ ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ
ΡΠ΅ΡΠ΅Π½ΠΈΠΉ, ΠΏΡΠΈΠ½ΠΈΠΌΠ°Π΅ΠΌΡΡ
ΠΏΡΠΈ ΡΠΎΠ·Π΄Π°Π½ΠΈΠΈ ΠΊΠΎΡΠ»ΠΎΠ² Ρ ΡΠΈΡΠΊΡΠ»ΠΈΡΡΡΡΠΈΠΌ ΠΊΠΈΠΏΡΡΠΈΠΌ ΡΠ»ΠΎΠ΅ΠΌ. ΠΠΎΠΌΠΈΠΌΠΎ ΠΏΡΠ°ΠΊΡΠΈΡΠ΅ΡΠΊΠΎΠΉ Π·Π½Π°ΡΠΈΠΌΠΎΡΡΠΈ, ΡΠ°ΠΊΠΎΠ³ΠΎ ΡΠΎΠ΄Π° ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ ΠΎΠ±Π»Π°Π΄Π°Π΅Ρ Π²ΡΡΠΎΠΊΠΎΠΉ Π½Π°ΡΡΠ½ΠΎΠΉ ΡΠΎΡΡΠ°Π²Π»ΡΡΡΠ΅ΠΉ, ΠΏΠΎΡΠΊΠΎΠ»ΡΠΊΡ Π² ΠΎΡΠ½ΠΎΠ²Π΅ ΠΏΠΎΡΡΠ°Π²Π»Π΅Π½Π½ΠΎΠΉ Π·Π°Π΄Π°ΡΠΈ Π»Π΅ΠΆΠ°Ρ ΡΡΠ½Π΄Π°ΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΡΠ΅ Π·Π°ΠΊΠΎΠ½ΠΎΠΌΠ΅ΡΠ½ΠΎΡΡΠΈ ΡΠΈΠ·ΠΈΠΊΠΎ-Ρ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΡΠΎΡΠ΅ΡΡΠΎΠ² Π² ΡΠΈΡΠΊΡΠ»ΠΈΡΡΡΡΠ΅ΠΌ ΠΊΠΈΠΏΡΡΠ΅ΠΌ ΡΠ»ΠΎΠ΅. Π¦Π΅Π»Ρ: ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΠ΅ ΠΏΠΎΠ΄Ρ
ΠΎΠ΄ΠΎΠ² ΠΈ ΠΏΡΠΈΠΌΠ΅Π½ΠΈΠΌΠΎΡΡΠΈ ΡΠΈΡΠ»Π΅Π½Π½ΡΡ
Π°Π»Π³ΠΎΡΠΈΡΠΌΠΎΠ² Ρ ΡΠ΄ΠΎΠ²Π»Π΅ΡΠ²ΠΎΡΠΈΡΠ΅Π»ΡΠ½ΡΠΌ ΡΡΠΎΠ²Π½Π΅ΠΌ Π΄Π΅ΡΠ°Π»ΠΈΠ·Π°ΡΠΈΠΈ ΠΈ ΡΡ
ΠΎΠ΄ΠΈΠΌΠΎΡΡΠΈ Π΄Π»Ρ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΡΠΎΠΏΠΎΡΠ½ΡΡ
ΠΏΡΠΎΡΠ΅ΡΡΠΎΠ² Π² ΠΊΠΎΡΠ»Π°Ρ
Ρ ΡΠΈΡΠΊΡΠ»ΠΈΡΡΡΡΠΈΠΌ ΠΊΠΈΠΏΡΡΠΈΠΌ ΡΠ»ΠΎΠ΅ΠΌ. ΠΠ±ΡΠ΅ΠΊΡΡ: ΡΠΎΠΏΠΊΠ° Ρ ΡΠΈΡΠΊΡΠ»ΠΈΡΡΡΡΠΈΠΌ ΠΊΠΈΠΏΡΡΠΈΠΌ ΡΠ»ΠΎΠ΅ΠΌ, ΠΎΠ±ΠΎΡΡΠ΄ΠΎΠ²Π°Π½Π½Π°Ρ Π΄Π²ΡΠΌΡ Π²Π²ΠΎΠ΄Π°ΠΌΠΈ ΠΏΠΎΠ΄Π°ΡΠΈ ΡΠΎΠΏΠ»ΠΈΠ²Π° ΠΈ ΠΈΠ½Π΅ΡΡΠ½ΡΡ
ΡΠ°ΡΡΠΈΡ Π½Π° ΡΡΠ»ΡΠ½ΠΎΠΉ ΡΡΠ΅Π½Π΅ ΠΈ Π΄Π΅ΡΡΡΡΡ ΡΡΡΠ±ΠΎΠΏΡΠΎΠ²ΠΎΠ΄Π°ΠΌΠΈ Π²ΡΠΎΡΠΈΡΠ½ΠΎΠ³ΠΎ Π΄ΡΡΡΡ Π½Π° ΡΡΠΎΠ½ΡΠΎΠ²ΠΎΠΉ ΡΡΠ΅Π½Π΅ Π² Π΄Π²Π° ΡΡΡΡΠ°. ΠΠ΅ΡΠΎΠ΄Ρ: ΠΌΠ°ΡΠ΅ΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠ΅ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ ΡΠΈΠ·ΠΈΠΊΠΎ-Ρ
ΠΈΠΌΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΏΡΠΎΡΠ΅ΡΡΠΎΠ² Π² ΡΠΎΠΏΠΎΡΠ½ΠΎΠΉ ΠΊΠ°ΠΌΠ΅ΡΠ΅ Ρ ΡΠΈΡΠΊΡΠ»ΠΈΡΡΡΡΠΈΠΌ ΠΊΠΈΠΏΡΡΠΈΠΌ ΡΠ»ΠΎΠ΅ΠΌ Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΠΉΠ»Π΅ΡΠΎ-ΠΠΉΠ»Π΅ΡΠΎΠ²Π° ΠΈ ΠΠΉΠ»Π΅ΡΠΎ-ΠΠ°Π³ΡΠ°Π½ΠΆΠ΅Π²Π° ΠΏΠΎΠ΄Ρ
ΠΎΠ΄ΠΎΠ² Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ RANS ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ. ΠΠ°ΠΏΠΈΡΠ°Π½Ρ Π΄ΠΈΡΡΠ΅ΡΠ΅Π½ΡΠΈΠ°Π»ΡΠ½ΡΠ΅ ΡΡΠ°Π²Π½Π΅Π½ΠΈΡ Π΄Π»Ρ ΡΠΎΡ
ΡΠ°Π½Π΅Π½ΠΈΡ ΠΌΠ°ΡΡΡ, ΠΈΠΌΠΏΡΠ»ΡΡΠ°, ΡΠ½Π΅ΡΠ³ΠΈΠΈ ΠΈ ΠΏΠ΅ΡΠ΅Π½ΠΎΡΠ° ΡΠ°ΡΡΠΈΡ. Π§ΠΈΡΠ»Π΅Π½Π½ΠΎΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠ΅ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½ΠΎ Ρ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠ΅ΠΌ ΠΏΠ°ΠΊΠ΅ΡΠ° ΠΏΡΠΈΠΊΠ»Π°Π΄Π½ΡΡ
ΠΏΡΠΎΠ³ΡΠ°ΠΌΠΌ Ansys Fluent v.12.1. Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ. ΠΠΏΡΠ΅Π΄Π΅Π»Π΅Π½Ρ Π½Π°ΡΠ°Π»ΡΠ½ΡΠ΅ ΠΈ Π³ΡΠ°Π½ΠΈΡΠ½ΡΠ΅ ΡΡΠ»ΠΎΠ²ΠΈΡ Π΄Π»Ρ ΡΠΈΡΠ»Π΅Π½Π½ΠΎΠ³ΠΎ ΠΌΠΎΠ΄Π΅Π»ΠΈΡΠΎΠ²Π°Π½ΠΈΡ ΠΏΡΠΎΡΠ΅ΡΡΠΎΠ² Π² ΡΠΎΠΏΠΎΡΠ½ΠΎΠΉ ΠΊΠ°ΠΌΠ΅ΡΠ΅ ΠΊΠΎΡΠ΅Π»ΡΠ½ΠΎΠ³ΠΎ Π°Π³ΡΠ΅Π³Π°ΡΠ° Ρ ΡΠΈΡΠΊΡΠ»ΠΈΡΡΡΡΠΈΠΌ ΠΊΠΈΠΏΡΡΠΈΠΌ ΡΠ»ΠΎΠ΅ΠΌ ΠΏΡΠΈ ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΠΈ ΠΠΉΠ»Π΅ΡΠΎ-ΠΠΉΠ»Π΅ΡΠΎΠ²Π° ΠΈ ΠΠ»Π΅ΡΠΎ-ΠΠ°Π³ΡΠ°Π½ΠΆΠ΅Π²Π° ΠΏΠΎΠ΄Ρ
ΠΎΠ΄ΠΎΠ².The relevance. In modern scientific research the computing experiment is one of the most productive means of studying complex tasks where the outcome depends on simultaneous influence of aerodynamics, heat transfer and combustion. Numerical calculations allow not only explaining correctly the physical phenomena noted at experimental installations, but quite often considerably extending expensive and labor-consuming physical or full-scale experiment with computer simulation. In this regard, the relevance of the research aimed at improving the methods of numerical analysis of furnace processes in boilers with circulating fluidized bed on the basis of computer mathematical modeling is very high to justify the basic design and technological decisions taken when creating boilers with circulating fluidized bed. In addition to practical significance, the research has a high scientific component, since the fundamental laws of physical and chemical processes in the circulating fluidized bed are the basis of the task. The aim of the research is to determine the approaches and applicability of numerical algorithms with satisfactory level of detail and convergence for modeling furnace processes in boilers with circulating fluidized bed. Object: furnace with circulating fluidized bed, equipped with two inputs of fuel and inert particles on the rear wall and ten secondary air inlets on the front wall in two decks. Methods: mathematical modeling of physical and chemical processes in a furnace chamber with circulating fluidized bed based on EulerEuler and Euler-Lagrangian approaches using RANS models. Differential equations for conservation of mass, momentum, energy and particle transport are written. The numerical study was carried out using the Ansys Fluent V. 12. 1 software package. Result. The initial and boundary conditions for numerical simulation of processes in the furnace chamber of a boiler unit with circulating fluidized bed using Euler-Euler and Euler-Lagrangian approaches are determined