how to enable turbo mode for MRF

jai · April 23, 2010, 22:57

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, 18:56

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

jai · April 28, 2010, 00:23

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, 06:44

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, 12:34

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, 13:01

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

jai · May 4, 2010, 22:54

hi
I've attached my warning message and my geometry preparation.
Is that correct?

Suzzn · May 5, 2010, 04:40

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, 10:05

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

May 5, 2010, 04:40		#8
Suzzn Member Susann Join Date: Apr 2009 Location: Dresden Posts: 33 Rep Power: 17	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.

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April 26, 2010, 18:56		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	Have you done the turbo machinery tutorial examples? This covers how to do basic turbomachinery analysis.

April 28, 2010, 00:23		#3
jai Member jaikrishna Join Date: Mar 2009 Location: chennai Posts: 56 Rep Power: 17	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

May 4, 2010, 06:44		#4
Suzzn Member Susann Join Date: Apr 2009 Location: Dresden Posts: 33 Rep Power: 17	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

May 4, 2010, 12:34		#5
jai Member jaikrishna Join Date: Mar 2009 Location: chennai Posts: 56 Rep Power: 17	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?

May 4, 2010, 13:01		#6
Suzzn Member Susann Join Date: Apr 2009 Location: Dresden Posts: 33 Rep Power: 17	What do you mean with "its working" and what says the warning message exactly?

May 5, 2010, 10:05		#9
jai Member jaikrishna Join Date: Mar 2009 Location: chennai Posts: 56 Rep Power: 17	hello sussan, yes ... but i didn't include the "heatshield" in hub region. i'll try this one too.