Quote:
Originally Posted by pugmanic
Are there any general rules of thumb for the size of VGs?
I have also seen on Air craft VG's, they are often angled in a Zig-Zag pattern along the wings, rather than perpendicular to the leading edge. Does anyone know the thinking behind this?
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*There are at least six different types of VGs.
*Some are co-rotating,some counter-rotating.
*Some are sub-boundary later height.
*Some are super-boundary layer-height.
*An aerodynamicist would specify a particular type for an aircraft,calculate the boundary layer thickness at the proposed attachment location,calculate the spacing and orientation.Or experiment with models to sneek up on the optimized setup through trial and error measurements in a wind tunnel.
*Without full-scale wind tunnel testing,or full-scale CFD it's impossible to accurately design for VGs.
