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

how to enable turbo mode for MRF

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

Reply
 
LinkBack Thread Tools Display Modes
Old   April 23, 2010, 22:57
Default how to enable turbo mode for MRF
  #1
jai
Member
 
jaikrishna
Join Date: Mar 2009
Location: chennai
Posts: 56
Rep Power: 8
jai is on a distinguished road
how can i post process the blade to blade, meridional plots in turbo mode(ref the attached pic 1 and pic 2) and how do i intialize in turo mode in cfx-pre?

note:
pic 2 shows the placement of turbine wheel inside the housing and pic 1 shows the stationary and rotating domains.

i know how to do it with single sector model (ie: SRF).
Attached Images
File Type: jpg pic 1.jpg (38.3 KB, 26 views)
File Type: jpg pic 2.jpg (40.1 KB, 21 views)
jai is offline   Reply With Quote

Old   April 26, 2010, 18:56
Default
  #2
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 10,259
Rep Power: 82
ghorrocks has a spectacular aura aboutghorrocks has a spectacular aura aboutghorrocks has a spectacular aura about
Have you done the turbo machinery tutorial examples? This covers how to do basic turbomachinery analysis.
ghorrocks is offline   Reply With Quote

Old   April 28, 2010, 00:23
Default
  #3
jai
Member
 
jaikrishna
Join Date: Mar 2009
Location: chennai
Posts: 56
Rep Power: 8
jai is on a distinguished road
I hope that, tutorial only explain about SRF (i.e.: with single flow passage) not entire blade passage and also with multi-component domain (ex: rotating and stationary domain).
Kindly notify me if it's available in tutorial
jai is offline   Reply With Quote

Old   May 4, 2010, 06:44
Default
  #4
Member
 
Susann
Join Date: Apr 2009
Location: Dresden
Posts: 33
Rep Power: 7
Suzzn is on a distinguished road
Hello jai,

when your in Post open the Turbo panel. Here you check mark the rotating domain and delete the check marks of the stationary components. After a double click on the rotating domain you can define the turbo regions (hub, shroud, blade....) and a 360 case without periodics....then initialize and you can watch blade-to-blade, meridional view and stuff. In the initialisation part left you can calculate the turbo velocity components.

hope that helps
Suzzn is offline   Reply With Quote

Old   May 4, 2010, 12:34
Default
  #5
jai
Member
 
jaikrishna
Join Date: Mar 2009
Location: chennai
Posts: 56
Rep Power: 8
jai is on a distinguished road
hello suzzn

thank you.
I've tried it it's working but got some warning message. i think some mistake in geometry preparation (i.e. defining correct name for the respected surface.. ex: blade, shroud..)
could you help me on this?
jai is offline   Reply With Quote

Old   May 4, 2010, 13:01
Default
  #6
Member
 
Susann
Join Date: Apr 2009
Location: Dresden
Posts: 33
Rep Power: 7
Suzzn is on a distinguished road
What do you mean with "its working" and what says the warning message exactly?
Suzzn is offline   Reply With Quote

Old   May 4, 2010, 22:54
Default
  #7
jai
Member
 
jaikrishna
Join Date: Mar 2009
Location: chennai
Posts: 56
Rep Power: 8
jai is on a distinguished road
hi
I've attached my warning message and my geometry preparation.
Is that correct?
Attached Images
File Type: jpg turbo warn.JPG (14.0 KB, 10 views)
File Type: jpg geo1.JPG (94.7 KB, 12 views)
File Type: jpg geo2.JPG (43.5 KB, 10 views)
File Type: jpg geo3.JPG (55.4 KB, 11 views)
jai is offline   Reply With Quote

Old   May 5, 2010, 04:40
Default
  #8
Member
 
Susann
Join Date: Apr 2009
Location: Dresden
Posts: 33
Rep Power: 7
Suzzn is on a distinguished road
Huhu Jai,

I get this warning message when I define the wrong turbo regions. In your case I would define the following turbo regions:

Hub = HUB+HEATSHIELD
Shroud = SHROUD
Blade = BLADE+BLADETIP
Inlet = INTER_TURBINEOUT
Outlet = INTER_FROZEN

But I guess you already did it that way ... so I think CFX needs the hub to start directly with the blades and the INTER_TURBINEOUT and your hub is a little longer in the inlet direction. So maybe you have to split the hub region in ICEM. Maybe CFX has also problems with the heatshield at the outlet because it looks like it would create an edge on the hub.

Good Luck
Susann

Last edited by Suzzn; May 5, 2010 at 04:57.
Suzzn is offline   Reply With Quote

Old   May 5, 2010, 10:05
Default
  #9
jai
Member
 
jaikrishna
Join Date: Mar 2009
Location: chennai
Posts: 56
Rep Power: 8
jai is on a distinguished road
hello sussan,
yes ... but i didn't include the "heatshield" in hub region. i'll try this one too.
jai is offline   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
DPM model in parallel batch mode Prashanth FLUENT 2 March 6, 2009 08:54
CFX in Turbo Mode Jack CFX 0 May 31, 2007 03:19
Turbo mode in CFX-5.7/10 kiran choudar CFX 2 July 5, 2006 03:10
Stator tip gap at hub in turbogrid /CFX post turbo Adam CFX 1 May 29, 2006 04:47
Batch mode swapnil CFX 5 November 23, 2002 10:38


All times are GMT -4. The time now is 13:32.