getting effective angle of attack from 3D VLM computation
 

Hello,

New here; I am currently using AVL (<meta http-equiv="content-type" content="text/html; charset=utf-8" />http://web.mit.edu/drela/Public/web/avl/) a vortex lattice method to look at 3D wind performance. I would like to extract data from there to look at section performance. I thought I could extract the effective angle of attack using the downwash angle but i doesnot appear to be so easy. In there I'd expect to see
effective angle of attack=geometrical angle of attack - downwash angle
however when doing that CL should be equal to 2*pi*effective angle of attack (or very close to).
which is not...<br type="_moz" />

RE: getting effective angle of attack from 3D VLM computation
 

Welcome to the RCU forums!

Did you try contacting the authors?

Authors:

Mark Drela, drela (AT) mit (DOT) edu
Harold Youngren, guppy (AT) maine (DOT) rr (DOT) com