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

thermal condition for combustor wall

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   February 25, 2013, 18:01
Default thermal condition for combustor wall
  #1
New Member
 
omar
Join Date: Feb 2013
Posts: 9
Rep Power: 13
MARIO276 is on a distinguished road
problem description:

I have done simulation for combustor but when i see temperature for inter surface is 750 K, and the outer surface is 875 K what's the reason ?
I think because I set the heat transfer coefficient zero is that right ?

please help me
MARIO276 is offline   Reply With Quote

Old   February 25, 2013, 18:33
Default
  #2
Senior Member
 
Join Date: Dec 2011
Location: Madrid, Spain
Posts: 134
Rep Power: 15
michujo is on a distinguished road
Hi, Mario.
I am not sure I understood your problem. Are you performing conjugate heat transfer (computing both the fluid and solid parts)? If so, and given that you set an adiabatic condition at the outer wall then I think that your results do not make much sense. I'd expect to have the same temperature at both the inner and outer wall sides (given that the outer wall is adiabatic).
If that's not the case it still does not make sense to me, as that situation would indicate that you've got a fluid outside your combustor, which is actually hotter than the burnt gases...
I guess I misunderstood it. Can you please explain it a bit further? Maybe throw in a picture?

Cheers,
Michujo.
michujo is offline   Reply With Quote

Old   February 25, 2013, 19:12
Default
  #3
New Member
 
omar
Join Date: Feb 2013
Posts: 9
Rep Power: 13
MARIO276 is on a distinguished road
I performed conjugate heat transfer.
in adiabatic the inter surface temp. of wall was 1228 k
in an adiabatic case, I assumed the combustor is in closed room and the outer condition temp. was 300 k

Have i to compute heat transfer coefficient ? and how ?

thank's a lot Mr. michujo.
Attached Images
File Type: jpg Capture.JPG (97.0 KB, 8 views)

Last edited by MARIO276; February 25, 2013 at 21:05.
MARIO276 is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
thermal condition for an interface wall takin FLUENT 2 September 1, 2009 11:36
thermal boundaries condition Antonin OpenFOAM Pre-Processing 0 May 14, 2009 07:34
Airfoil boundary condition Frank Main CFD Forum 1 April 21, 2008 19:36
defining thermal boundary condition??? REZA FLUENT 1 February 15, 2006 22:13
Info: Short Course On Thermal Design of Electronic Equipment Arnold Free Main CFD Forum 0 August 10, 1999 11:18


All times are GMT -4. The time now is 04:07.