Downwash distribution

[Reji Rejish]

Hi OpenVSP Team,

I would like to plot downwash distribution along the span of the wing.

From this previous discussion, I noticed that we could obtain the donwwash by survey the flowfield.

https://groups.google.com/g/openvsp/c/KqP3XrMXTg0/m/GHN22jvlAAAJ

Is there any C++ function available inside openVSP which we could use to obtain u,v, w velocity components along the spanwise direction?  This would help us to extend our C++ API to call the specific function.

Could you please point me how to obtain these results?

Best regards, 

Rejish

[Brandon Litherland]

I haven't gone hunting in the source for VSPAERO to find where those values are stored in memory.  They can be written out so they must be there somewhere, hopefully exposed in the results manager.

If I have time I can try to find the values.  If you want to try, you can search the OpenVSP GitHub repository or download the source code and search for where it writes the values to text and then trace back from there.  That's what I'll be doing.

[Rob McDonald]

These values are calculated in VSPAERO only.  OpenVSP does not read them back into memory or into the Results Manager.

Consequently, there is no way to access these from an API.  You will need to parse the file -- or extend the OpenVSP VSPAERO integration to read the file and get the data into OpenVSP's memory.

Rob

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[Reji Rejish]

Hi OpenVSP Team, 

Thanks for the input, I will look into the VSPAERO source code to access the data.

Best regards, 

Rejish