airfoilprep.Polar.correction3D

Polar.correction3D(r_over_R, chord_over_r, tsr, alpha_max_corr=30, alpha_linear_min=-5, alpha_linear_max=5)

Applies 3-D corrections for rotating sections from the 2-D data.

Parameters :

r_over_R : float

local radial position / rotor radius

chord_over_r : float

local chord length / local radial location

tsr : float

tip-speed ratio

alpha_max_corr : float, optional (deg)

maximum angle of attack to apply full correction

alpha_linear_min : float, optional (deg)

angle of attack where linear portion of lift curve slope begins

alpha_linear_max : float, optional (deg)

angle of attack where linear portion of lift curve slope ends

Returns :

polar : Polar

A new Polar object corrected for 3-D effects

Notes

The Du-Selig method [1] is used to correct lift, and the Eggers method [2] is used to correct drag.