Ducted turbine

Details Ducted turbine Ducted turbine

1998-09-24

2000-04-25

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Ambient fluid or exhaust gas directed through hub, fairing...

416 93A, 416 93R, 416176, 416175, 416177, 416178, 416187, 416189, 416192, 416193R, 416195, 416198R, 416200A, 416200R, 416201A, 416201R, 416124, 416130, B63H 128

Patent

active

060537000

ABSTRACT:
A turbine 400 has a central duct 410 which accelerates fluid passing through it and a blade configuration which retards the flow of fluid near the tips of the turbine. This structure results in a vortex having a higher fluid pressure behind the tips of the turbine blades 408 and a lower fluid pressure behind the duct. In the present invention, this vortex is enhanced by (1) an increased acceleration of the fluid passing through the duct 410 and a deceleration of the fluid passing through the blades 408; and/or (2) by a fluid redirection device 850 for directing the fluid passing through the duct towards the outer diameter of the turbine.

REFERENCES:
patent: 949150 (1910-02-01), Kestner
patent: 3071194 (1963-01-01), Geske
patent: 3883264 (1975-05-01), Rao
patent: 4086026 (1978-04-01), Tamanini
patent: 4159191 (1979-06-01), Graybill
patent: 4427343 (1984-01-01), Fosdick
patent: 4778419 (1988-10-01), Bolle et al.
patent: 5800123 (1998-09-01), Travor
Wind Machines Handbook, pp. 51-55, 60-61, 1976.
Yen, James T. "Tornado-Type Wind Energy System:Outline of Recent Developments", Dec. 3-5, 1980.

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