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Boundary Layer Control - Skin Friction

thread675-38824

Boundary Layer Control - Skin Friction

Boundary Layer Control - Skin Friction

(OP)
I'm investigating possible drag reductions for ship hulls and submarines.  Is there any data available for skin texture (roughness, etc) effects at various speeds and/or Reynolds numbers, etc?

I've heard that sharks have a matt finish which reduces their total drag quite a bit.  Anyone know about this subject?

RE: Boundary Layer Control - Skin Friction

Somewhat off topic; there recently, i.e., sometime this year, Scientic American had a fascinating article about using supercavitation as a means of reducing drag for torpedoes.  I've also been told that certain anti-mine ammuntion likewise uses supercavitation to get increased penetration depth.

TTFN

RE: Boundary Layer Control - Skin Friction

I note that this thread is fairly old, but this information may still be usefull.  There is an ultra thin coating that can be applied over hull paint that will greatly reduce drag.  It is self bonding and non-stick in nature.  It can be found at www.kiss-cote.com.  ;

Good luck,

Malcolm

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