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Summary
Operating principle
Blade-tip jet experiments
Opposite blade-tip jet experiments
Experimental conclusion and discussion
Theoretical proof
Other Information
Contact us
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Summary
Experiment project:
A horizontal-axis wind turbine, on
which the air (or wind) in front of a hollow hub of the wind turbine is
drawn into the holed blades by the low pressure produced by its centrifugal
force, then the jets in the blade-tips are formed and ejected at a high
velocity in an opposite direction to the rotating direction of the wind
turbine.
A horizontal-axis wind turbine is a kind of passive fluid mechanics, the
deeper research into this principle perhaps is helpful to other fluid
mechanics
Maybe someone will think:
(1) Because of a small inlet, the incoming wind energy is very small, so it
can't produce important effect.
(2) Because the centrifugal force comes from the blade, and the centrifugal
force gives the jet the energy, and the jet produces a thrust on the blade
in turn, is it a forever-working-machine?
However, a number of conceptual and comparetive experiments show that
both ideas above are incorrect: the centrifugal force consumps the wind
energy indeed, but the force has the air in front of the hub exhaust from
the blade-tip at "high speed" and the more work done by it, This
is the spirit of the blade-tip jet technique.
The idea was proved by the phenomena we observed in testing.
(1)The rate of increase in the power or power coefficient is up to 50.2% due
to the blade-tip jets, generally, it is over 30%.
(2) With a wind speed of 8 m/s, the rotation speed of the wind turbine can
reach more than 1000 rpm without jet, but for opposite blade-tip jet (100%
jet flow rate), it can't reach the rating rotation speed of the generator,
even through at a wind speed of 23 m/s.
How
to explain this phenomenon in testing?
A horizontal-axis wind turbine only a
type kind of fluid
mechanics, the deeply research maybe do some help to other fluid
mechanics
We hope that you can join us and
give your advices, and that we can cooperate with each other to make further
investigations on this program, if it is possible.
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