How to model a heat source for ignition of flame

harshad88 · November 19, 2013, 13:36

Hello,

I am simulating a partially premixed flame in fluent with premixed CH4+air mixture and pure-air as coflow. The experiment does not have a pilot for flame ignition hence I am trying to simulate a heat source that can act as an ignition source for the flame.

Can anybody let me know how I can do this? Would really appreciate your help.

Thanks

smhosseini · November 20, 2013, 03:44

Hi Harshad,
Your reaction is the ignition source. In Fluent, you should define the reaction, turn the energy on and determine the reaction enthalpy.

harshad88 · November 20, 2013, 21:14

Hi smhosseini,

Thanks a lot for your reply.

I do define my boundary conditions and the appropriate reactions. The flame is not igniting. Actually in the experiments the flame would ignite only with the help of an igniter/propane torch kept on the base of the burner. To model the propane torch I was thinking of having a heat source in the mesh.

How can i model a heat source in the mesh?

smhosseini · November 21, 2013, 02:18

Did you read Fluent user guide -> Modeling Partially Premixed Combustion?

November 19, 2013, 13:36	How to model a heat source for ignition of flame	#1
harshad88 New Member Harshad Lalit Join Date: May 2013 Posts: 26 Rep Power: 13	Hello, I am simulating a partially premixed flame in fluent with premixed CH4+air mixture and pure-air as coflow. The experiment does not have a pilot for flame ignition hence I am trying to simulate a heat source that can act as an ignition source for the flame. Can anybody let me know how I can do this? Would really appreciate your help. Thanks

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November 20, 2013, 03:44		#2
smhosseini Member Mohsen Join Date: Jul 2012 Posts: 49 Rep Power: 14	Hi Harshad, Your reaction is the ignition source. In Fluent, you should define the reaction, turn the energy on and determine the reaction enthalpy.

November 20, 2013, 21:14		#3
harshad88 New Member Harshad Lalit Join Date: May 2013 Posts: 26 Rep Power: 13	Hi smhosseini, Thanks a lot for your reply. I do define my boundary conditions and the appropriate reactions. The flame is not igniting. Actually in the experiments the flame would ignite only with the help of an igniter/propane torch kept on the base of the burner. To model the propane torch I was thinking of having a heat source in the mesh. How can i model a heat source in the mesh?

November 21, 2013, 02:18		#4
smhosseini Member Mohsen Join Date: Jul 2012 Posts: 49 Rep Power: 14	Did you read Fluent user guide -> Modeling Partially Premixed Combustion?