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

How to model a (gas-turbine) swirler in 2D

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

Reply
 
LinkBack Thread Tools Display Modes
Old   May 6, 2009, 09:55
Default How to model a (gas-turbine) swirler in 2D
  #1
New Member
 
Giuki Cael
Join Date: May 2009
Location: Belgium/The Netherlands
Posts: 13
Rep Power: 8
Giuki is on a distinguished road
Dear all,

I'm trying to simulate a RQL type of combustion chamber. However to achieve a physical flow pattern I should include a swirler at the entry. I read through different parts of the User's Guide but couldn't find a solution. As I understand it is possible in a 3D model but cannot find any information for 2D. Is it even possible in 2D to have a (sort of) swirling flow?

I'm using preheated air (800K) as oxidizer and methane (300K) as fuel. The combustion model I use is the non-premixed model with pdf-table. As turbulence model I use the RNG k-eps model.

Thanks in advance!

Giuki
Giuki is offline   Reply With Quote

Old   June 11, 2009, 20:04
Default
  #2
Member
 
AdidaKK's Avatar
 
Mauricio Caamaño Flores
Join Date: May 2009
Location: Punta Arenas, Chile
Posts: 62
Rep Power: 8
AdidaKK is on a distinguished road
Send a message via MSN to AdidaKK
im gona paste here some question and response frome ANSYS FAQ.

Is there any way of doing a 2D simulation in CFX?

Yes. From a 2D mesh of the geometry, extrude it one element in the normal direction. For a 2D planar simulation this would be one element in the normal vector direction, for a 2D axisymmetric simulation this would be sweeping a small angle with one element. For the planar mesh the extrusion should be approximately equal to the smallest element edge length in the model, for the axisymmetric mesh the sweep should be a small angle, maximum 5° but smaller if you want high accuracy.
In CFX-Pre you should set the top and bottom faces of the extrusion as symmetry planes. If you want to include swirl in the model use periodic boundaries. The remaining boundaries should be set as walls, inlets, openings and outlets to define the flow.
The CFX documentation discusses 2D simulations and it is recommended you read it before proceeding.

but..you'r working in FLUENT i "suppose" that the way of works its very similar.

another thing im working in a combustion chamber too from a HITACHI GE turbine,and i have some problems to do design the chamber in CAD,it is possible if you can share with me your cad design of the combustion chamber?

regards

Last edited by AdidaKK; June 12, 2009 at 04:43.
AdidaKK is offline   Reply With Quote

Old   June 12, 2009, 04:21
Default
  #3
New Member
 
Giuki Cael
Join Date: May 2009
Location: Belgium/The Netherlands
Posts: 13
Rep Power: 8
Giuki is on a distinguished road
Dear AdidaKK,

Thanks for the advice, this is an interesting way of doing a 2D simulation, I will get into it.

Are you interested in a 2D model or a 3D model?

Regards,

Giuki
Giuki is offline   Reply With Quote

Old   June 12, 2009, 04:39
Default
  #4
Member
 
AdidaKK's Avatar
 
Mauricio Caamaño Flores
Join Date: May 2009
Location: Punta Arenas, Chile
Posts: 62
Rep Power: 8
AdidaKK is on a distinguished road
Send a message via MSN to AdidaKK
im interesting in the 3d model

my mail its adidakk@gmail.com

thanks allot =)

best regards
AdidaKK is offline   Reply With Quote

Old   June 12, 2009, 07:19
Default
  #5
New Member
 
Giuki Cael
Join Date: May 2009
Location: Belgium/The Netherlands
Posts: 13
Rep Power: 8
Giuki is on a distinguished road
Dear AdidaKK,

Well I only have a 3D model for an adjusted geometry, which is a configuration for a flameless combustion regime, I don't know if that would help you?

PS. The model is build in SolidWorks 2008, I don't know if you can use this format...

Regards,

Giuki
Giuki is offline   Reply With Quote

Old   June 12, 2009, 15:51
Default
  #6
Member
 
AdidaKK's Avatar
 
Mauricio Caamaño Flores
Join Date: May 2009
Location: Punta Arenas, Chile
Posts: 62
Rep Power: 8
AdidaKK is on a distinguished road
Send a message via MSN to AdidaKK
Giuki

im working actually with solidworks 2008 sp3,im really new in this CAD,but i love it XD.all the tutorials are very cool.

and respect of the combustion chamber CAD ,its just for have an idea of the problem design .My real problem its i dont have the design planes of the tubular chamber,(Hitachi Turbine GE 25M), just have the real unit in the lab of my University,so i have to work on it.

so if you can share your cad that be wonderfull ,just for have an idea.


best regrads
AdidaKK
AdidaKK is offline   Reply With Quote

Reply

Tags
2dim, combustion, swirler

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
force acting on gas turbine blade.... vvj Main CFD Forum 1 March 3, 2010 02:04
CFX application to radial inflow gas turbine Chetan Mistry CFX 5 June 2, 2007 13:13
how to model gas to particle conversion thandavan CFX 0 June 14, 2006 05:28
gas turbine combustor linear cooling holes- cfd P.K.UDAYAKUMAR FLUENT 1 December 13, 2002 03:08
flow in gas turbine Abdul Hafid Main CFD Forum 1 September 14, 1998 09:39


All times are GMT -4. The time now is 12:35.