Numerical investigation of heat and mass transfer processes in the combustion chamber of industrial power plant boiler. Part 1, Flow field, temperature distribution, chemical energy distribution
Date issued
2017
Journal Title
Journal ISSN
Volume Title
Publisher
University of West Bohemia
Abstract
In the present paper, the furnace chamber of the BKZ-160 boiler ofAlmaty TPP-3 (Kazakhstan) has been calculated.
The thermal characteristics of the process were studied in the form of the distribution of temperature fields and
chemical energy, and the aerodynamics of the combustion chamber was also calculated. The type of fuel, its
elementary and fractional composition, exerts the greatest influence on the course of heat-mass exchange processes
and aerodynamics. The computational experiment was carried out with two models of particle size distribution: a
polydisperse fuel flame (the particle diameter varies from 10 to 120 μm) and monodisperse fuel flame (particle size
identical and equal to dp = 60 μm). Based on the results of the computational experiments, the main regularities in
the distribution of heat fluxes in the combustion chamber volume and flow aerodynamicswere obtained. It is shown
that the greatest thermal load falls on the central region of the walls of the combustion chamber and the location of
the burner devices, which is typical for both mono- and polydisperse fuel flames. The temperature data obtained
as a result of the computational experiment showed better convergence with the empirical data obtained directly
at TPP-3. Aerodynamics of the flow for the two selected models of particle size distribution has insignificant
differences, but how they affect other characteristics of the process is one of the following tasks in view of the
authors. It should be noted that the calculation of the polydisperse fuel flame takes much more calculation time.
Description
Subject(s)
numerická simulace, spalování, práškové palivo, monodisperzní palivový plamen, polydisperzní palivový plamen, aerodynamické vlastnosti, tepelné vlastnosti
Citation
Applied and Computational Mechanics. 2017, vol. 11, no. 2, p. 1-14.