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

Pre-heat combustion air

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

Reply
 
LinkBack Thread Tools Display Modes
Old   November 12, 2003, 06:01
Default Pre-heat combustion air
  #1
Eric
Guest
 
Posts: n/a
Hi,

I want to investigate the effect of pre-heating the combustion air to a burner. I'm doing this by simulating a system with an inlet velocity , calculated from a known mass flow rate, for stiochiometric conditions and then simulating the same system for stoichiometric conditions with the pre-heated combustion air.

If the air is pre-heated there is a density change that in turn causes an increase in velocity if the mass flow rate must remain the same, I'm sure this correct??

So how do you tell the difference between the effect the preheat has on the flow and the effect the increased velocity has on the flow?????

Or can the velocity be kept constant?? Please help really stuck!!

Regards,

Eric
  Reply With Quote

Old   November 17, 2003, 12:36
Default Re: Pre-heat combustion air
  #2
Erwin
Guest
 
Posts: n/a
Of course the velocity increases when you use preheated air for a given liberation rate, you still need the same amount of oxygen for cmoplete combustion.

The change in your flame shape/quality is indeed effected by both air speed and temperature, my guess is that the temperature is more important.
  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
Heat transfer from air to solid Tramph FLUENT 0 January 25, 2011 18:42
Air for combustion AdidaKK Main CFD Forum 0 December 16, 2009 18:20
heat transfer - heating element to air in FloWorks Duncan Gravill Main CFD Forum 1 March 28, 2007 20:16
Two-Phase Buoyant Flow Issue Miguel Baritto CFX 4 August 31, 2006 12:02
Heat emitted by combustion products Mark FLUENT 0 April 21, 2004 07:59


All times are GMT -4. The time now is 20:54.