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-   -   BLADEGEN-TURBO GRID BASIC QUESTION (http://www.cfd-online.com/Forums/cfx/23931-bladegen-turbo-grid-basic-question.html)

Dip May 3, 2007 15:31

BLADEGEN-TURBO GRID BASIC QUESTION
 
My problem is to model the rotor-stator interaction of a centrifugal compressor. I AM NOVICE TO BLADEGEN AND TURBOGRID.

I have two options.

Option A Either to import already created impeller and diffuser in solidworks into Turbo-Grid. Or,

Option B Create impeller and diffuser in BladeGen

USING OPTION A

1. If I just import the solid parts into TurboGrid, in format do i import it ? 2. Is it exactly the solid parts that I import or I have to solid model the fluid domain (as solid)? Meaning, do I have to solid model the fluid flow volume between the blades to represent the fluid domain with hub,shroud, inlet and outlet walls ? while the blade is like the empty space?

3. In that case, I believe I have to join the rotor and stator fluid domain in solidworks and bring them into TurboGrid ! ....Is this how it is done?

USING OPTION B

4. If I create rotor and stator in BladeGen separately, do I join them in BladeGen or join the meshes in TurboGrid ? How is this done ?

I have gone through the tutorials of CFX stating the analysis for rotor-stator interaction. But cannot find answer to my above questions.

Please help.

Thank you, Dip


Albi May 4, 2007 07:37

Re: BLADEGEN-TURBO GRID BASIC QUESTION
 
Create the rotor and the stator mesh separately. After that you should import the two meshes in CFX, where you can set the interface between the outlet of the stator and the inlet of the rotor. The interface is a fluid-fluid interface, use the frozen rotor or stage algorithm.

Let me know.

Bye.

Albi

Johnny May 5, 2007 08:04

Re: BLADEGEN-TURBO GRID BASIC QUESTION
 
Option B is easier. Mesh each separately in TurboGrid, and import the two meshes into Pre. See tutorial 12 in CFX help doc.

deLuther May 5, 2007 11:06

Re: BLADEGEN-TURBO GRID BASIC QUESTION
 
I did not see any significant problem of using aproach A. To translate geometry to TurboGrid you can use Data import wizard in BladeGen and then (or parallel) export to TurboGrid. For that aproach you should use IGES file for each part (impeller and diffuser). And there is possible ways to use only geometry of parts instead of creating flow regions. Wizard lets you use any space curve or segment because it can be transformed into meridional profile. Just read BladeGen documentation (Data import wizard).

Johnny May 7, 2007 07:19

Re: BLADEGEN-TURBO GRID BASIC QUESTION
 
I suppose the import wizard isn't too bad when only exporting to a TurboGrid file. However, importing an IGES file will import every single curve in the IGES file. It is very cumbersome to figure out what is what in my opinion. So I'd try to defeature as much as possible in Solidworks before writing the IGES file if you do go this route.

Dip May 7, 2007 12:00

Re: BLADEGEN-TURBO GRID BASIC QUESTION
 
THANK YOU ALL FOR YOUR SINCERE SUGGESTIONS !

I would try and reply back soon.

Thank you,

Dip

deLuther May 8, 2007 07:04

Re: BLADEGEN-TURBO GRID BASIC QUESTION
 
Import wizard lets you choose curves for construction of meridional and blade profile. But, yes, it can be cumbersome so strip your model as possible :)

annie August 16, 2010 03:42

I have two problem in working with BladeGen:
1-At first when I click new, a dialog box opens and I can specify the shape of the blade. But I want to have NACA 651510 as the airfoil of rotor blade.How can I specify that?
Is it possible to import x-y data of the airfoil in Bladegen?How?

2-The other problem is that I want to model a tandem rotor for an axial compressor in bladeGen.How can I do this?There is only a choice for splitter blade,but I don't want to put the second airfoil between them.I want to put the second airfoil with an axial distance about -10% span and 80%span percent pitch of first airfoil.Is it possible?

chico1952 March 8, 2013 03:05

Annie did you ever have any success with your NACA profile


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