Re: [PSUBS-MAILIST] Minn Kota - Thrust

[Jon Hylands <hylands@ibm.net>]

On Thu, 09 Mar 2000 21:38:17 PST, "Paul Suds" <paul_suds@hotmail.com>
wrote:

> I understand that the teardrop is the most 
> effecient sub design, from a laminar flow and friction loss standpoint.

Actually...

I read, a couple years ago, a paper by some guys in Japan, who did some
extensive studies of underwater laminar flow, and they found that a
modified teardrop, with the main bulge moved back to about the half-way
point, was the most efficient form underwater.

Had something to do the the tip vortex messing up the flow, and that shape
minimized the vortex much better than a straight tear-drop.

I'm trying to find the paper reference, but no luck so far...

Later,
Jon

--------------------------------------------------------------
   Jon Hylands      Jon@huv.com      http://www.huv.com/jon

  Project: Micro Seeker (Micro Autonomous Underwater Vehicle)
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