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Drag coefficient of NACA airfoils

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Old   April 22, 2009, 07:12
Default Drag coefficient of NACA airfoils
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Jorge Muñoz
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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.
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Old   April 22, 2009, 09:20
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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.
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Old   April 23, 2009, 11:50
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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?
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Old   April 23, 2009, 11:52
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See

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