AAE 334, Fall 2011, Homework 14
Due Monday, October 3 at the beginning of class.
Building on homework 11:
Consider a single horseshoe vortex of span
i
b centered on the origin of the coordinate
system,
0
,
0
,
y
x
, in the z=0 plane as shown below in a view from above the wing.
The strength of the vortex
is
i
.
We wish to formulate a solution to be computed for the induced drag on a wing of span
i
b
b
that is
created by the downwash of the upwind wing.
That is, the downwash of the second wing on itself is covered in the
text we will add that in for a computer project.
For this assignment, compute the induced drag assuming:
Density is constant and is called
Flight velocity is constant and is called
V
Both wings are in the z=0 plane
The second wing is centered at the point (x
2
, y
2
) and has circulation distribution
j
y
The second wing is divided into N equallength segments along the span and the downwash is computed at
the point (x
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 Fall '09
 COLLICOTT
 Aerodynamics, Lift, Di Di, cos Bi, Ai cos Bi

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