CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > CFX

Methane combustion in gas burner

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Display Modes
Old   June 6, 2005, 08:36
Default Methane combustion in gas burner
  #1
Stefano
Guest
 
Posts: n/a
I'm trying to model a methane-air combustion process (turbulent)in a burner. This model consist in an orifice from which methane flows, a venturi where the methane air mixture is created (primary air inlet) and a series of orifices with secondary air mixing and combustion. I have tried many combustion models (EDC, FRC and combined EDC/FRC) but none of them gives a meaningful result (depending on the model there is no ignition or, on th contrary, the mixture ingnites inside the venturi and not outside the oulet orifices). Does anyone have some good advice?
  Reply With Quote

Old   June 7, 2005, 02:12
Default Re: Methane combustion in gas burner
  #2
Joe
Guest
 
Posts: n/a
Starting with the EDC: you should asure that the constant EDM B has value larger than zero, otherwise you will have reaction in any place where fuel and air are mixed. In this case reaction rate of the EDC is larger than zero only if there products in the mixture. Consequently you have to initialize with some products somewhere in your domain.

EDM B less than zero is only reasonable for diffusion flames.
  Reply With Quote

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Constant velocity of the material Sas CFX 15 July 13, 2010 08:56
combustion natural gas burner Jorge Chacón Hernandez FLUENT 4 May 26, 2010 07:03
mass flow in is not equal to mass flow out saii CFX 2 September 18, 2009 08:07
Methane Combustion Lars FLUENT 4 March 5, 2003 09:24
Gas pressure question Dan Moskal Main CFD Forum 0 October 24, 2002 22:02


All times are GMT -4. The time now is 20:05.