Reply To: Fluent Combustion Problem

[felix512]

 

Thanks for your repley.

Indeed, the mesh I attached has a low quality. I already tried with high refined mesh, but it also doesn’t work. I went back to low mesh to improve calculation time, because some simulations were really really long (for example after patching temperature and/or species, the calculation time is extremly high, more than 20min for 1 iteration).

I understand that the problem might be blowoff limit of the flame, but the burner that I’m studying have a ‘simple’ geometry, without swirl/pre-heanting or other thing to stabilize the flame. A worker already did a thesis with this burner and succeed to obtain good stabilization with ‘real’ experiment. Hence, I think the problem might comes from my model…

I succeed to modelize using the Non-Premixed combustion, with Steady-Diffusion Flamelet + prompt and thermal NOx => perfect results.

My problem is that for the future, I would like to add ammonia in my model, and I’ll need fuel NOx calculations, which is impossible with Non-Premixed model without activating Discrate Phase, not suited for my case (I think).

 

Hence, the EDC model seems to be the best solution in my case, since this model can calculate NOx model with the mechanism imported.

 

Do you have any advice please ? Thanks.