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

Interface model for a radial inflow turbine

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

Reply
 
LinkBack Thread Tools Display Modes
Old   February 28, 2013, 05:23
Question Interface model for a radial inflow turbine
  #1
New Member
 
KJ
Join Date: Dec 2012
Posts: 1
Rep Power: 0
kelinjose is on a distinguished road
Hi,

I am trying to simulate a turboexpander with radial inflow and axial outflow.
It consists of three parts basically
1. Nozzle : Stationary part, radial flow of fluid
2. Blade : Rotating with high rpm, radial inflow, axial outflow
3. Diffuser : Stationary, along the axis of rotation as shown in the figure.

I created all the blades as single blade was not giving me proper results
I am using 3 interfaces
1. Rotational periodic betwen the blades Per1 - Per2
2. Frozen rotor, for both the other interfaces.

Am I using the correct interface model? Which is the best turbulence model to be used in this.
Thanks a lot for helping

Please see the link for the system
http://dl.dropbox.com/u/11526528/cfx.png

kelinjose is offline   Reply With Quote

Old   February 28, 2013, 06:41
Default
  #2
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 10,803
Rep Power: 85
ghorrocks has a spectacular aura aboutghorrocks has a spectacular aura aboutghorrocks has a spectacular aura about
Have a look at the rotating machinery tutorials and documentation about the differences between the different approaches.

The choice of what turbulence model depends on what you are tryign to model as well. In general SST is a good choice, but some applications require RSM, LES, DES or laminar models.
ghorrocks is offline   Reply With Quote

Old   February 28, 2013, 14:00
Default
  #3
New Member
 
hitesh
Join Date: Feb 2013
Posts: 1
Rep Power: 0
hitesh5190 is on a distinguished road
what boundary conditions and cell zone conditions r u using?
hitesh5190 is offline   Reply With Quote

Reply

Tags
cfx, frozen rotor, interface model

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
Radiation interface hinca CFX 15 January 26, 2014 18:11
Difficulty in calculating angular velocity of Savonius turbine simulation alfaruk CFX 8 December 3, 2013 17:51
Water subcooled boiling Attesz CFX 7 January 5, 2013 04:32
gas turbine combustor model - HELP! Phil Main CFD Forum 5 April 10, 2007 11:54
gas turbine combustor model - HELP! Phil Main CFD Forum 0 April 8, 2007 20:38


All times are GMT -4. The time now is 18:32.