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Ignition in premixed combustion simulation.

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Old   April 16, 2024, 07:10
Default Ignition in premixed combustion simulation.
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Hi everyone!

I'm currently trying to simulate a premixed NH3-flame (steady-state).

I've imported the GRI 3.0 mechanism. I've selected Species Transport, volumetric reactions, Eddy-Dissipation concept and applied a velocity inlet (1 inlet) where I've specified mole fractions of NH3 and O2 which is at 300 K. Additionally, I've initialized the domain with a temperature of 2500 K in order to ignite the mixture. The temperature contours however show 300 K in the entire domain after simulating, and the NH3 doesn't react.

Before running this simulation, I've used the same settings for methane-air mixture (even without initializing T=2500 K) and this does react.

Do you have any tips on how to solve this problem?

Thank you in advance!

Last edited by SemB; April 17, 2024 at 07:15.
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combustion modelling, ignition

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