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NACA 0012 Optimisation

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Old   January 28, 2022, 06:57
Exclamation NACA 0012 Optimisation
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Abhijith
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I'm optimizing the symmetric NACA 0012. The constraint is based on thickness.

But when I use SU2_GEO. SU2 is evaluating the thickness of the airfoil as 0.

These are my Geometry Evaluation Parameters


GEO_MARKER= ( airfoil )
% Geometrical evaluation mode (FUNCTION, GRADIENT)
GEO_MODE= FUNCTION



Please help me with this.

Thanks
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File Type: txt naca0012.txt (14.5 KB, 7 views)
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Old   January 31, 2022, 09:18
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Jan Navratil
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Hello,
my guess is, that you must uncomment this:


%GEO_DESCRIPTION= AIRFOIL


Cheers,
Jan
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Old   February 9, 2022, 15:29
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Abhijith
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Hi, thanks for the input. Even if uncomment it. The results are the same.


%GEO_DESCRIPTION= AIRFOIL


SU2_GEO fails to evaluate the thickness.


And I can't apply any constraints under "OPT_CONSTRAINT=" for the optimisation.
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Old   February 10, 2022, 05:32
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Jan Navratil
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Hi,


I tried you input file on my 2D mesh (just airfoil and pressure far field boundaries) and it works. I uncoment thate option what I adviced. But I also commented



%MARKER_SYM = (symmetry)


I guess your case is 2D as well and there is not symmetry plane.


Hope, it will help.


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Old   February 10, 2022, 06:15
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@Jan Navratil


Hi, thanks for your reply. I think you are using the full geometry of NACA 0012. My case is symmetric.

So, If I uncomment it:

%MARKER_SYM = (symmetry)

The following error shows up:

The configuration file doesn't have any definition for marker symmetry


Thanks
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Old   February 10, 2022, 07:01
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OK. Maybe this is the cause of your problem. It might be that SU2_GEO is not prepared to calculate thickness of an airfoil modeled as symmetric case.


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Old   February 10, 2022, 07:09
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@Jan Navratil

Yes, you are right. When using SU2_GEO it fails to calculate AIRFOIL_THICKNESS, AIRFOIL_TOC etc.

So I can not constraint the optimisation.
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