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

spray and combustion with EGR

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

Reply
 
LinkBack Thread Tools Display Modes
Old   March 24, 2006, 04:23
Default spray and combustion with EGR
  #1
usker
Guest
 
Posts: n/a
I am running diesel spray and combustion model.Unpremixed/Diffusion, EBU LATCT. I tried to calculate NOx concentration with EGR rate 5%, 10%, 15% and 20%, setting respectively initial conditions for air with CO2 concentration. However, for all of these models, I get the same temperature and NOx values. I checked all time steps, but either the values are the same, or they differ very little. For example, if EGR is 20%, NOx reduction is supposed to be about 50%. But, I can not get even close to this fact. Perhaps, I need to use different model settings. Does anybody know this problem? Please advise.

Regards
  Reply With Quote

Old   March 27, 2006, 20:32
Default Re: spray and combustion with EGR
  #2
usker
Guest
 
Posts: n/a
I am running diesel spray and combustion model.Unpremixed/Diffusion, EBU LATCT. I tried to calculate NOx concentration with EGR rate 5%, 10%, 15% and 20%, setting respectively initial conditions for air with CO2 concentration. However, for all of these models, I get the same temperature and NOx values. I checked all time steps, but either the values are the same, or they differ very little. For example, if EGR is 20%, NOx reduction is supposed to be about 50%. But, I can not get even close to this fact. Perhaps, I need to use different model settings. Does anybody know this problem? Please advise.

Regards

  Reply With Quote

Old   April 5, 2006, 17:31
Default Re: spray and combustion with EGR
  #3
shankar
Guest
 
Posts: n/a
Pls provide the details of initialisation of scalars for O2 and N2 concentration of intake, cylinder, and exhaust and also provide boundary O2 and N2 concentration details of intake and exhaust
  Reply With Quote

Old   April 29, 2009, 07:21
Default eddy break up ebu for diesel
  #4
New Member
 
mosheu
Join Date: Apr 2009
Posts: 14
Rep Power: 7
hkoten is on a distinguished road
hi
how do you use ebu for unpremixed model,
did you close cfm or ecfm models in esice
hkoten@hotmail.com
hkoten is offline   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
help spray and combustion Razio FLUENT 0 March 16, 2008 19:45
diesel spray and combustion with EGR usker CD-adapco 1 May 16, 2007 04:34
spray and combustion with EGR usker CD-adapco 0 March 27, 2006 20:33
spray combustion baskar FLUENT 2 May 14, 2005 04:25
Spray combustion validation David FLUENT 0 December 20, 2004 12:51


All times are GMT -4. The time now is 08:11.