Drag coefficient of NACA airfoils
 

Hi!

I didn't know if this was the best place to ask that...Anyway..

I'm trying to make a simple design optimization study of drag coefficient of a NACA airfoil, but since there are so many and i'm not used to work with them i didnt know which one to choose. My idea is to take one which has a CD as high as possible, in order to see better an improvement on design to decrease the drag. Any idea??

I really need help to start the study asap...so any advice is welcome...

Thanks in advance,

Jorge.

Are you doing inviscid or viscous ? If inviscid, try the standard RAE2822 test case. You can reduce the drag by about 70% under lift constraint. Same test case might be good for viscous too.

Hi! thanks for answering so fast. I'm gonna study both cases...So do u suggest me using RAE2822...but is it a NACA one?

See

http://www.grc.nasa.gov/WWW/wind/val...af/raetaf.html