Progress in Computational Fluid Dynamics, Vol. 14, No. 3, 2014
151
Copyright 2014 Inderscience Enterprises Ltd.
Possibilities of redesigning the louvre separator in the air
mixing duct of a thermal plant using numerical simulation
Mirko Kozi Military Technical Institute, Ratka Resanovica 1,
Belgrade, Serbia E-mail: [email protected]
Slavica Ristic*, Mirjana Puharic and Boris Katavi Institute
Gosa, Milana Rakica 35, Belgrade, Serbia E-mail: [email protected]
E-mail: [email protected] E-mail:
[email protected] *Corresponding author
Abstract: This paper presents the results of multiphase flow
numerical simulations in ventilation mill-mixing duct with louvers
separator of Kostolac B power plant (Serbia). Simulations are
performed using both the mixture model of the Euler-Euler approach
and Euler-Lagrange approach of ANSYS FLUENT software package. The
gas mixture distribution at the burner feed ducts obtained by the
Euler-Euler mixture model is in a good agreement with the
experiment, but this model gives the large differences between the
calculated and measured pulverised coal distribution. Much better
agreement of the coal distribution at the burners is obtained using
the Euler-Lagrange approach with discrete phase model (DPM). It is
noticed that, due to the narrow gaps between the louvers, only a
small fraction of the pulverised coal passes through the gaps. The
DPM model is used in redesign louvers separators geometry, to
obtain optimal distribution of the pulverised coal at the
burners.
Keywords: numerical simulation; ventilation mill; air mixing
duct; redesign of separator.
Reference to this paper should be made as follows: Kozi, M.,
Ristic, S., Puharic, M. and Katavi, B. (2014) Possibilities of
redesigning the louvre separator in the air mixing duct of a
thermal plant using numerical simulation, Progress in Computational
Fluid Dynamics, Vol. 14, No. 3, pp.151165.
Biographical notes: Mirko Kozi received his PhD from Faculty of
Mechanical Engineering, Belgrade University in 1993. He is a Senior
Research Associate worked in development and application of CFD. In
the last several years, he has been working in preparing numerical
simulations using software FLUENT for wide range of problems,
starting from aeronautical area (airplane and helicopter loads,
calculation of collection efficiency, etc.). Besides that, flow
around wind and tidal turbine as well as movement of smoke due to
fire in the traffic tunnel were simulated and analysed. Also, the
simulations and analysis of gas mixture flow and motion of the coal
powder particles in the power plant mill have been performed.
Slavica Ristic received her PhD from School of Electrical
Engineering, University of Belgrade in 1993. She is a Principal
Research Fellow and she has experience in experimental fluid
mechanics, holographic interferometry, optical and non-optical
method of flow visualisation, laser Doppler anemometry, numerical
flow simulation and flow visualisation, thermal science,
thermography.
Mirjana Puharic received her PhD from Faculty of Mechanical
Engineering, Belgrade University in 2009. She is a Research
Associate and she has experience in experimental fluid dynamics and
in software application that can be implemented in different areas,
such as: research, development, simulation and optimisation of
processes and products, design and construction, analysis of the
load, introduction of information technology in product
development, application of computer design (product design,
analysis and simulation of flow, elastomechanical simulation, etc.)
.
