![]() MECHANICAL ENGINEERING Combustion Laboratory |
DARTFIRE Simulation |
![]() LEWIS RESEARCH CENTER |
PPS2A Parameters
|
Property |
Symbol |
Value and units |
|
Ambient temperature |
|
298 K |
|
Ambient |
|
0.5 |
|
Ambient pressure (atm) |
p |
1 atm |
|
Mean velocity of the opposed-flow |
Vg |
variable |
|
Lewis number |
|
1 |
|
Planck mean absorption coefficient |
|
variable |
|
Specific heat of gas at 700 K |
|
1.183 kJ/(kgK) |
|
Activation energy for the gas-phase reaction |
Eg |
8.895× 104 kJ/kmol |
|
Activation temperature of the gas-phase |
|
10.7× 103 K |
|
Pre-exponential factor of gas-phase reaction |
Bg |
5.928× 109 s-1 |
|
Stoichiometric ratio |
s |
1.92 |
|
Heat of combustion |
|
25.9× 103 kJ/kgF |
|
Thermal conductivity of the gas at 700K |
l g |
4.84 × 10-5 Ns/m2 |
|
Absolute viscosity of the gas at 700K |
m g |
0.0675x10-3 Ns/m2 |
|
Activation energy for pyrolysis reaction |
Es |
12.978× 104 kJ/kmol |
|
Activation temperature for pyrolysis |
|
7805 K |
|
Pre-exponential factor for pyrolysis |
As |
2.82x109 s-1 |
|
Specific heat of solid fuel |
|
1.465 kJ/(kgK) |
|
Solid fuel density |
r s |
1.19× 103 kg/m3 |
|
Pyrolysis heat of vaporization |
|
941.08 kJ/KgF |
|
Thermal conductivity of the solid fuel |
l s |
0.188 W/(m K) |