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

Combustion CFD Question

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

Like Tree1Likes
  • 1 Post By Sarang V

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   November 3, 2015, 12:20
Question Combustion CFD Question
  #1
New Member
 
Jack
Join Date: Oct 2015
Posts: 2
Rep Power: 0
jr_3 is on a distinguished road
Hi Everybody,
Pretty broad CFD question coming up...
In about 2 months of research into combustion CFD, I've seen plenty of studies that use a 2D axisymmetric (wedge) mesh to simulate compression ignition but zero studies using this type of engine geometry for Spark Ignited cases. I get that axisymmetric cases are highly idealized and that there isn't a whole lot of symmetry in spark engines but are there any other arguments out there for or against 2D gasoline CFD simulations, apart from those two intuitions?

Thanks in advance.
jr_3 is offline   Reply With Quote

Old   November 3, 2015, 14:16
Default
  #2
New Member
 
Sarang
Join Date: Oct 2015
Posts: 22
Rep Power: 10
Sarang V is on a distinguished road
Compression ignition

A sector approach is usually preferred for diesel combustion simulations because of the way fuel is injected. If you have a 6 hole multi-nozzle injector you could create a sector of 60 degrees. The sides of the sector mesh are assigned periodic boundary condition and not a symmetry BC.

Spark Ignition

1. The entire engine is modelled because the flame front is not symmetric (due to non-homogeneities in fuel composition and turbulence quantities).

2. It is extremely important to capture TKE to get the flame propagation correctly (at-least while using detailed chemical kinetics). This can be achieved only if you simulate the intake stroke (full engine geometry).
jr_3 likes this.
Sarang V is offline   Reply With Quote

Reply

Tags
cfd, combustion

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
CFD Design...The CFD Future John C. Chien Main CFD Forum 20 November 20, 2015 00:40
Future CFD Research Jas Main CFD Forum 10 March 30, 2013 13:26
CFD of combustion process of Homogeneous Charge Compression Engine (HCCI) kelvinlim Main CFD Forum 2 January 26, 2012 23:19
Question regarding CFD PhD Mateo Main CFD Forum 4 January 5, 2006 04:52
ASME CFD Symposium, Atlanta, July 2001 Chris R. Kleijn Main CFD Forum 0 September 13, 2000 05:48


All times are GMT -4. The time now is 19:54.