[Lor_enz]

Hello,

i was wondering if one can give me hint on how to couple a volute with a stator-rotor simulation.

MRF with just a stator and a rotor works perfectly fine. Adding just a section of a diffusor works as well but as soon as I add the volute to the simulation i get a segementation fault error.

I guess its due the fact that SU2 tries to find spans in the volute. Even though if i define it as a general fluid interface.

Is there any possible to couple a turbomachinery simulation with a general volute, as there is no option in SU2 turbomachinery kind, for a volute.

Set up:

• Turbomachinery markers are only at the stator and rotor inlets/outlets
• Mixing plane between volute outlet/stator inlet & stator outlet/rotor inlet
• Volute inlet - total conditions

I have attached an drawing of the fluid domains as well as the config files and log file. The volute.cfg, rotor.cfg and stator.cfg only holds the mesh file and grid movement.

EDIT:
I looked a bit through the source code and tried to understand how the solver is handling turbomachinery. If i understand it right, the problem lies in the assigning of turbomachinery kind to each zone. I have not yet figured out, how to avoid to set an turbomachinery kind to one zone, as setting "NONE" is not a valid option.


best regards,

Lorenz

[ashvin]

Originally Posted by Lor_enz

Hello,

i was wondering if one can give me hint on how to couple a volute with a stator-rotor simulation.

MRF with just a stator and a rotor works perfectly fine. Adding just a section of a diffusor works as well but as soon as I add the volute to the simulation i get a segementation fault error.

I guess its due the fact that SU2 tries to find spans in the volute. Even though if i define it as a general fluid interface.

Is there any possible to couple a turbomachinery simulation with a general volute, as there is no option in SU2 turbomachinery kind, for a volute.

Set up:

• Turbomachinery markers are only at the stator and rotor inlets/outlets
• Mixing plane between volute outlet/stator inlet & stator outlet/rotor inlet
• Volute inlet - total conditions

I have attached an drawing of the fluid domains as well as the config files and log file. The volute.cfg, rotor.cfg and stator.cfg only holds the mesh file and grid movement.

EDIT:
I looked a bit through the source code and tried to understand how the solver is handling turbomachinery. If i understand it right, the problem lies in the assigning of turbomachinery kind to each zone. I have not yet figured out, how to avoid to set an turbomachinery kind to one zone, as setting "NONE" is not a valid option.


best regards,

Lorenz

Hi Lorenz,
Sadly, I have the same issue and I have not been able to figure it out. I may just remove the volute part.
Ashvin

[joshkellyjak]

Hi Lorenz,


At the minute the turbovertex structure is built between two periodic boundaries (see this paper https://arc.aiaa.org/doi/epdf/10.2514/1.B37685), I assume in your case with volute you do not have periodic boundaries, and model the whole volute? This is a requested feature by several users but at the minute I don't think anyone is actively working on it. In my opinion you have two options -

1 - Implement the modification of the turbovertex structure to be able to build the required data structure around a full annulus rather than between two periodic boundaries


2 - Model only half the volute and use periodic boundaries


I would encourage you to attempt option 1 and there are several developers who will be able to assist with this, but option 2 could work fine for your application.