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-   -   how to enable turbo mode for MRF (http://www.cfd-online.com/Forums/cfx/75398-how-enable-turbo-mode-mrf.html)

jai April 23, 2010 23:57

how to enable turbo mode for MRF
 
2 Attachment(s)
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).

ghorrocks April 26, 2010 19:56

Have you done the turbo machinery tutorial examples? This covers how to do basic turbomachinery analysis.

jai April 28, 2010 01:23

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

Suzzn May 4, 2010 07:44

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

jai May 4, 2010 13:34

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?

Suzzn May 4, 2010 14:01

What do you mean with "its working" and what says the warning message exactly?

jai May 4, 2010 23:54

4 Attachment(s)
hi
I've attached my warning message and my geometry preparation.
Is that correct?

Suzzn May 5, 2010 05:40

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

jai May 5, 2010 11:05

hello sussan,
yes ... but i didn't include the "heatshield" in hub region. i'll try this one too.


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