Development of a Thermal Stresses Based Fragmentation Model for Pul...

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Development of a Thermal Stresses Based
Fragmentation Model for Pulverized Coal
Particles Gasification by Low Temperature
...

Introduction
Motivation
Model description
Results
 Conclusions
 Future work
Presentation outline
2/26

Introduction, Plasma fire support technology
3/26
Air-coal
mixture
channel
Plasma
generator Boiler furnace
Hot air plasma...

Introduction, Plasma coal gasification process
4/26
Specific phenomena
have to be taken into
account:
.Very high
temperat...

Motivation
5/26
It is necessary to demonstrate its advantages over conventional
systems
The main challenge is that the m...

Mathematical model, general features
6/26
The reactive flow field was described in Eulerian manner.
The turbulence was m...

Mathematical model, fragmentation modeling
7/26
Physical
particles with
same properties
Computational
cell
Strength = 6
St...

Mathematical model, fragmentation modeling
8/26

Mathematical model, fragmentation modeling
9/26
Standard model − zero dimensional model
TP
rP
vP
Tgas
radiation
convection

Mathematical model, fragmentation modeling
10/26
UDF based model − one dimensional model
rP,0 rP,max
i i+1i-1
rP,i-1
TP,i-...

Mathematical model, implementation
11/26
Governing transport equations
DPM equations
User FV code -> TP[i]
inert heating
d...

Results, temperature distribution
12/26
No fragmentation

Results, temperature distribution
13/26
5 fragments

Results, temperature distribution
14/26
8 fragments

Results, temperature distribution
15/26
10 fragments

$Results, volatile species mass fraction 16/26 10 fragments No fragmentation$

$Results, CO species mass fraction 17/26 10 fragments No fragmentation$

Results, volatile and char conversion
18/26

$Fragmentation model based on fracture mechanics was developed and implemented into ANSYS FLUENT solver with extensive use...$

THANK YOU FOR YOUR ATTENTION
Acknowledgments
The authors would like to acknowledge high appreciation
for the support and p...