Flame ignition not ocurring

luisporto_99 · July 4, 2022, 07:38

Hello everyone.
I am currently simulating a methane air combustion using the jones and lindsted mechanism and using the thermodynamic and transport data from the grimech mechanism. It is a premixed combustion using the eddy dissipation concept model. The problem is, I am getting no ignition even after patching the inlets to a high temperature. I guess the problem is not with the simulation itself because when the temperature of the inlet is high the reaction occurs. Any suggestions to solve this problem?

Case:
-Pressure-based solver
-Realizable k-e model
-do for radiation
-Species Model with EDC model
- Air and Ch4 enter at the same inlet in 3D model at 300K
- Inlets are mass-flow and outlet is outflow

I have tried patching the entire furnace for 2000K or even just a part of the inlet but nothing happened. Should I give initial values for the quantity of products I am predicting to obtain?

Thank you very much.

fre20 · January 4, 2024, 14:01

Hello. Have you solved this issue? Could you share you Jones and Lindstedt mech file?
Thanks

July 4, 2022, 07:38	Flame ignition not ocurring	#1
luisporto_99 New Member Luis Porto Join Date: Apr 2022 Posts: 3 Rep Power: 4	Hello everyone. I am currently simulating a methane air combustion using the jones and lindsted mechanism and using the thermodynamic and transport data from the grimech mechanism. It is a premixed combustion using the eddy dissipation concept model. The problem is, I am getting no ignition even after patching the inlets to a high temperature. I guess the problem is not with the simulation itself because when the temperature of the inlet is high the reaction occurs. Any suggestions to solve this problem? Case: -Pressure-based solver -Realizable k-e model -do for radiation -Species Model with EDC model - Air and Ch4 enter at the same inlet in 3D model at 300K - Inlets are mass-flow and outlet is outflow I have tried patching the entire furnace for 2000K or even just a part of the inlet but nothing happened. Should I give initial values for the quantity of products I am predicting to obtain? Thank you very much.

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January 4, 2024, 14:01		#2
fre20 New Member Join Date: Sep 2023 Posts: 7 Rep Power: 3	Hello. Have you solved this issue? Could you share you Jones and Lindstedt mech file? Thanks