I think, if you look for comprehensive answers to your questions, you need to formulate them more precisely. The term validation describes the comparison of e.g. a CFD simulation result with experimental data. So of course, if you intend to do a true validation, you need to compare both with each other.

And if I Google for "NACA0012 drag lift data" the first hits on the first Google answer page contain valuable information about lift and drag data for NACA0012:

https://turbmodels.larc.nasa.gov/naca0012_val.html

http://airfoiltools.com/airfoil/details?airfoil=n0012-il

So the information is already on your finger tips. Using a re-digitization tool, those graphs can easily be converted back into raw data with just a little effort. Is it that what you were looking for?

Regards,

Dr. Thomas Frank.

Dear sir,

In case of CFD validation you have to compare the result with a good paper which is experiment based. If you google to Airfoil generating tool website, you will get experimental results done by NACA and NASA which may help you validate the result.

Regards.

Dear

The best way is to contact the paper authors.

Or use NACA store data for each type.

Regards

Alaa