George, here are two figures from
K&W – one could be described as a “Wedge” figure 12-6 and the other one a
“streamline” wedge figure 12-12.
Always dangerous for me to
try to interpret what K&W are really saying, but from what I get from
these two figures, it would appear that the “streamline” wedge permits you to
use a smaller inlet (Ai = 0.30 Ab) for the same performance (same losses) that
you get with a larger opening Ai = 0.44 Ab for the pure Wedge. But, that
is just my take on it.
The slight bump (where the 64 deg
angle is annotated) of the Streamline wedge may be to increase the boundary
layer velocity to delay separation of the boundary layer in that far
corner where duct meets core.
Ed
Ed
Anderson
Rv-6A N494BW Rotary
Powered
Matthews,
NC
eanderson@carolina.rr.com
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