
347CFD Modeling of Oxygen-Enhanced Combustion
Y
f
F
pfdf
O
st
=−
()
∫
max,10
(14.47)
and
(14.48)
The transport equations for G is
∂
∂
+∇⋅−∇⋅ +
∇
=∇
()
−
ρ
ρ
µ
σ
µ
σ
µρ
ε
t
UG G
CFC
G
t
tL
gt g
()
1
2
2
(14.49)
Here
C
g1
and C
g2
are model constants
k is the turbulent kinetic energy
ε is its dissipation rate
Thus the treatment of turbulent combustion for a
single-step diffusion ame is rather straightforward.
14.5.2 Combustion Modeling: Finite Rate Chemistry
In many cases, it is not sufcient to model the overall
reaction as given by Equation 14.36. While this formu-
lation accounts correctly for the heat release associated
with complete combustion, i ...