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Combustion Simulation ANSYS Fluent - There is no ignition delay

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Old   December 14, 2017, 07:48
Default Combustion Simulation ANSYS Fluent - There is no ignition delay
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Rudolf Diesel
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I am trying a combustion simulation of diesel engine under the following settings.

I compared a pressure history between a simulation and a experimental.
However I don't get a agreement at the ignition delay period.
I tried to change some parameters,but i never get ignition delay from simulation.

https://www.dropbox.com/s/exmthra143...%20PM.png?dl=0

How can i get a ignition delay from simulation?
Please help me.

Chemkin Input: Diesel_1comp_35sp_chem.inp(From tutorial)
Thermal Date File: Diesel_1comp_35sp_therm.dat(From tutorial)

Diesel Unsteady Flamelet Model
-Boundary Species
-O2: 0.231
-N2: 0.7575
-CO2: 0.0005
-H2O: 0.01

Injection Properties
-Material: Diesel liquid
-Diameter Distribution: uniform
-Diameter(m): 40.5e-6
-Temperature(k): 366.7K
-Cone Angle(deg): 6.52
-Cone Radius(m): 1.1e-4
-Total Flow Rate(kg/s): 1.065e-5
-Velocity Magnitude(m/s): 201.1

Initialization
-Gauge Pressure(pascal): 0
-Temperature(K): 300
-Turbulent Kinetic Energy(m2/s2): 0.025
-Turbulent Dissiption Rate(m2/s3): 0.0034

Last edited by Rudolf Diesel; December 14, 2017 at 12:32.
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