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July 16, 2019, 05:02 |
Eddy formation in laminar flame combustion.
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New Member
Etienne
Join Date: Jul 2019
Posts: 3
Rep Power: 7 |
Hi everyone,
I've recently started working with reactive flow under Star-CCM+ and I would like some advice regarding my simulation. I'm trying to compute the laminar combustion of a premixed N2O/CH4 mixture over a cylindrical burner. To do so, I'm using an axisymetric model wtih Complex chemistry (GriMech 3.0) Laminar flame concept, laminar flow and premixed combustion models. When setting the velocity to a low value (1 m.s-1) the simulation works fine but I'm facing a problem with higher velocity (2 m.s-1). As expected, the "root of the flame" starts to be V-shaped but the velocity and reacting zone are orthogonal causing my flame to deviate sideway wich leads to the apparition of large eddy inside the flame. https://ibb.co/TmSMzV3 https://ibb.co/Z8jnyBm Is the velocity close to the reacting zone supposed to look like that ? (It really seems un-physical to me) Do you have any tip to make my laminar flame more laminar ? I already tried numerous different meshes, different geometry (with or without the burner as a solid in the simulation) but none of those lead to a correct result.. Best Regards, Etienne Last edited by Wouated; July 16, 2019 at 05:03. Reason: Images not displayed |
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combustion modelling, laminar flame, premixed combustion |
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