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Ansys Learning Forum › Forums › Discuss Simulation › Fluids › No ignition in premixed combustion › Reply To: No ignition in premixed combustion

May 3, 2024 at 12:45 pm
felix512
Subscriber

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.