Hi All
Michael Hayes asks about how bubbles could be deployed.
One possibility would be for a pair of wind-driven vessels to sail side
by side at, say, a kilometre separation, attached to each other by a
buoyant, streamlined tether.
The chord of the tether would be about 100 mm. In plan
Stephen,
This technology is already used for towing hydrophone streamers in geophys,
but it doesn't work quite like you suggest. There's no need for two boats,
and instead there's a paid of towed hydrofoils behind one boat, with the
support line tensioned between them. The low mass of the
Thank you both for the insight.
Yes, I do now recall the dual boat tether concept and I have some working
back ground in towing a long array of gear. From a pilot's point of view, I
can see an advantage of the dual boat/tether over the towed array. In that,
turning would be easier as well as
Another approach to the bubble generation effort, and one Russell has
suggested, is to take advantage of existing ships (of order 1000 to 10,000
commercial ships at sea on a given day) and to put bubble generators on
them‹perhaps doing so in a way that reduces their hull friction to make up
for
I have played with the idea of designing a prop which incorporates
ultrasonic cavities to produce bright water. But, the modeling is beyond my
capabilities. If it can be shown to the boat owners that such a prop would
generate more thrust by breaking up the cohesion of the water just forward
of
Hey, Ken -
I guess it's a matter of seeing the glass half full...If I remember
correctly the material of out LBL
(Akhbari Rosenfeld 2007, 2010, etc) actually cited help from you on
their RF translations for white surfacing, so you're
clearly as much 'in the know' as anyone on all their figures,
Andrew
I did think about paravanes on a single ship as you suggest but thought
that we could avoid the drag of the paravane by making two systems as
long as the paravane that you would have chosen, joining them together
and throwing away the two paravanes. Two boats is OK if the wake is
Hi Stephen
I think your concerns about pumping energies are misplaced. The mass of air
pumped would be pretty low as the bubbles are so small, so there won't be
big displacements, frictional losses, etc. My guess is that the energy to
overcome ship drag and the energy to form the bubbles will
Here is a short overview article which points to a possible use for bright
water if a long lasting variant can be developed.
Agulhas leakage fueled by global warming could stabilize Atlantic
overturning circulation: study
I ask for your patients!
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Here is a patent concerning a possible means for producing Stable (long
life) Bright Water.
http://www.patents.com/us-5531980.html
http://www.patents.com/us-5531980.htmlHere are key passages;
'The tensides or surfactants which are
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