Reply To: No ignition in premixed combustion

[felix512]

Hello all,

I have a similar problem with the ignition in my simulation.

I'm using the GRI 3.0 mechanism, for non premixed air-methane combustion, but the ignition doesn't start... And as Sem, when I do the same simulation with methane-air mixture, it works.

Do you know how I can solve this issue please ? 

Here are my parameters :

• Steady combustion, with energy model, k-e viscous model and Species Transport model (using GRI 3.0 + Eddy Dissipation Concept)
• Air inlet velocity (I tried 2,4 and 6,1, but it doesn't works...), 300K
• Fuel inlet velocity 5 m/s, 300K, 100% methane
• Outlet pressure of 101kPa
• Coupled Pressure scheme, and 2nd order for spacial discretisazions

I'm trying to reproduce a simulation I found on a paper, to learn and improve in combustion simulations. Hence, normally these parameters are correct (according to the paper, which succeed to do simulations with these parameters...).

So I don't get why my mixture doesn't ignite, can you help me please ?

 

Thanks.