Three phase Eulerian-granular model applied on numerical simulation of non-conventional liquid fuels combustion in a bubbling fluidized bed
The paper presents a two-dimensional CFD model of liquid fuel combustion in bubbling fluidized bed. The numerical procedure is based on the two-fluid Euler-Euler approach, where the velocity field of the gas and particles are modeled in analogy to the kinetic gas theory. The model is taking...
Main Authors: | , , , , |
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Format: | Article |
Language: | English |
Published: |
VINCA Institute of Nuclear Sciences
2016-01-01
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Series: | Thermal Science |
Subjects: | |
Online Access: | http://www.doiserbia.nb.rs/img/doi/0354-9836/2016/0354-98361500196N.pdf |
Summary: | The paper presents a two-dimensional CFD model of liquid fuel combustion in
bubbling fluidized bed. The numerical procedure is based on the two-fluid
Euler-Euler approach, where the velocity field of the gas and particles are
modeled in analogy to the kinetic gas theory. The model is taking into
account also the third - liquid phase, as well as its interaction with the
solid and gas phase. The proposed numerical model comprise energy equations
for all three phases, as well as the transport equations of chemical
components with source terms originated from the component conversion. In the
frame of the proposed model, user sub-models were developed for heterogenic
fluidized bed combustion of liquid fuels, with or without water. The results
of the calculation were compared with experiments on a pilot-facility (power
up to 100 kW), combusting, among other fuels, oil. The temperature profiles
along the combustion chamber were compared for the two basic cases:
combustion with or without water. On the basis of numerical experiments,
influence of the fluid-dynamic characteristics of the fluidized bed on the
combustion efficiency was analyzed, as well as the influence of the fuel
characteristics (reactivity, water content) on the intensive combustion zone.
[Projekat Ministarstva nauke Republike Srbije, br. TR33042: Improvement of
the industrial fluidized bed facility, in scope of technology for energy
efficient and environmentally feasible combustion of various waste materials
in fluidized bed] |
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ISSN: | 0354-9836 2334-7163 |