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Old   June 18, 2018, 07:32
Question NASA rotor 37
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Tom
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Hi All,
I'm currently trying to simulate NASA rotor 37 in rhoSimpleFoam with k-omega SST Model.

I've had several goes at it but every time my model crashes after a few thousand iterations.
I tried Mass flow inlet and static pressure outlet as well as total pressure inlet and static pressure outlet but both have failed.
Has anyone managed to successfully simulate rotor 37 or rotor 67 in OpenFOAM?

If yes, could you please share the boundary condition files you used or give me some hints

many thanks,
Tom
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Old   June 18, 2018, 22:35
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Hrvoje Jasak
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Hi,

Have a look at:

Josip Žužul: Numerical evaluation of the performance curve for the NASA rotor 67, Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, 2017

on my CFD research group web site

https://foam-extend.fsb.hr/dissemina...tudent-thesis/

There is also a direct download link for the Thesis in English with an extended abstract in Croatian:

http://foam-extend.fsb.hr/wp-content...aster_2017.pdf

Hope this helps,

Hrv
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Old   June 19, 2018, 06:55
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Quote:
Originally Posted by hjasak View Post
Hi,

Have a look at:

Josip Žužul: Numerical evaluation of the performance curve for the NASA rotor 67, Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, 2017

on my CFD research group web site

https://foam-extend.fsb.hr/dissemina...tudent-thesis/

There is also a direct download link for the Thesis in English with an extended abstract in Croatian:

http://foam-extend.fsb.hr/wp-content...aster_2017.pdf

Hope this helps,

Hrv
This is great thanks.
I just managed to compile the extended version and am going through the tutorials.

Last edited by tom.opt; June 20, 2018 at 07:43.
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Old   July 4, 2018, 06:20
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has anyone ever managed to do rotor 37 in OpenFoam I wonder?
I've already been struggling for over a month with little luck.
Perhaps the solver can't cope with this geometry/flow.
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Old   October 3, 2018, 06:37
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Stéphan AUBIN
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Hi to all
I am also interested in running a rotor67 to learn compressible rotating openFOAM.
Tom > did you succeed ?
Stéphan
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Old   October 3, 2018, 13:42
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Hi Stephane,
I have not managed to get a satisfactory result with the current version of OpenFoam.
I'm afraid that for rotor 37 the problem was that mass doesn't conserve when using periodic boundaries. I tried with both the regular and extended edition.
I suggest trying to simulare a full annulus mesh if you want to do rotor 37 ,if you have the computational power.
The rotor 67 test case is slightly easier to mesh and simulate, I suggest you have a look at the above referenced paper. It is quite good
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Old   October 4, 2018, 04:19
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Stéphan AUBIN
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Dear Tom
Thanks for your inputs.

Frankly, Rotor37 is a must to validate compressible turbomachines. It is well documented and works on all the industrial solvers...

Wandering on the forum I found some info about the works done by Matvey Kraposhin, a member of this group.
I tried to contact him at it appears he has a good compressible MRF solution that also works for low Mach Numbers...

I keep you posted !

Stéphan
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Old   October 4, 2018, 07:52
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Quote:
Originally Posted by stephan_aubin View Post
Dear Tom
Thanks for your inputs.

Frankly, Rotor37 is a must to validate compressible turbomachines. It is well documented and works on all the industrial solvers...

Wandering on the forum I found some info about the works done by Matvey Kraposhin, a member of this group.
I tried to contact him at it appears he has a good compressible MRF solution that also works for low Mach Numbers...

I keep you posted !

Stéphan
Thanks,
if you managed to get rotor 37 validated in openfoam please let me know.
I need to get this testcase running so I can test some flow control models.

Tom
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Old   October 4, 2018, 08:15
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OK !!
I will no problem !
Stéphan
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Old   October 13, 2018, 11:05
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Originally Posted by stephan_aubin View Post
OK !!
I will no problem !
Stéphan
Hi,
have you managed to make any progress on rotor 37 ?

Tom
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Old   October 13, 2018, 13:05
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Stéphan AUBIN
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Dear Tom
no but because I haven’t had the time to work on it.
thans for asking!
Stéphan
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Old   November 23, 2018, 07:14
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Dear all


Today I am starting to work on rotor 37 case in openfoam.
I will be also updating you about my progress.


Some initial questions:

How did you get the geometry/mesh?

If you got it from the tables of NASA technical reports (I assume by using .curve files), what tool did you use to generate geometry/mesh ?


Regards.


Ersin
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Old   November 23, 2018, 07:25
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Quote:
Originally Posted by ersoflow View Post
Dear all


Today I am starting to work on rotor 37 case in openfoam.
I will be also updating you about my progress.


Some initial questions:

How did you get the geometry/mesh?

If you got it from the tables of NASA technical reports (I assume by using .curve files), what tool did you use to generate geometry/mesh ?


Regards.


Ersin
HI Ersin,

I got the geometry/mesh from a colleagues but I think it should be readily available on the internet as a CAD file.
To mesh it I have tried several software packages:
PADRAM(which is an in house code that I got for turbomachinery)
GridPro
SnappyHex Mesh

The best mesh was obtained with GridPro after a considerable amount of work, however if you are good with SnappyHex mesh then that's free to use and can also get decent meshes.

To export into OpenFOAM I usuaully first save in fluent format the mesh then fluentToFoam.
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Old   November 24, 2018, 07:12
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Hello Tom.
Thanks for your reply.

I got the .curve files for hub, shroud and profile from the internet.
I realize that it is easy to generate mesh in Turbogrid by using.curve files.
Now I am try to export the mesh into openfoam, however Turbogrid does not export meshes in .msh format. Maybe I should first import it to fluent.

Regards.

Ersin
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