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Fourier Transformation with Harmonic Balance

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Old   August 3, 2023, 12:36
Default Fourier Transformation with Harmonic Balance
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Hey guys,

currently i am working on a transient rotor stator problem. in my model, consisting of inlet channel - rotor - stator - outlet channel, i have already simulated a Fourier transform with time integration. this has worked so far and the results agree well with those of a steady state reference simulation. Now i want to try a harmonic balance as transient method instead of time integration. for this i have defined the interfaces between inlet and rotor as well as stator and outlet as frozen rotor interfaces, because stage mixing plane is not viable. However I get some warnings and an error message before the simulation even starts. i will post this message below:

| ****** WARNING ****** |
| |
| This Transient Blade Row run may experience robustness and/or |
| convergence difficulties caused by the "Frozen Rotor" domain |
| interface : IF1 |
| which could inject additional frequencies not captured by the |
| defined Fourier transformations. |

Details of error:-
Error detected by routine PEEKCA

Current Directory : /ABR/OUTPUT/ZN1

| ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| Stopped in routine MEMERR |
| |
| |
| |
| |
| |

| An error has occurred in cfx5solve: |
| |
| The ANSYS CFX solver exited with return code 1. No results file |
| has been created. |

End of solution stage.

Does anyone have an idea what the problem could be here?

PS: I have already asked a short question about this, where I thought that the problem is solved so far, but it did not quite work. someone said the periodic boundarys could be the reason but i checked them and found nothing suspicious, especially since there were no issues with it before.

Best Regards,

Sebastian Maier is offline   Reply With Quote


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