| CPC F03D 9/25 (2016.05) [F03D 1/04 (2013.01); F03D 1/06 (2013.01); H02K 7/183 (2013.01); F05B 2220/706 (2013.01); F05B 2250/70 (2013.01)] | 17 Claims |
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1. A wind turbine system comprising:
a flow consolidating conduit that extends from an airflow capture inlet to a consolidating conduit downstream end; and
an air driven rotor assembly having a rotor assembly upstream end located downstream of the consolidating conduit downstream end, the air driven rotor assembly comprising:
a rotor housing;
a rotor within the rotor housing, the rotor having a plurality of air driven blades distributed around a rotor rotation axis and multiple air redirecting blades located radially inward of the air driven blades, the rotor having a radially inward entry direction, and each air redirecting blade:
being circumferentially spaced apart from each other air redirecting blade of the multiple air redirecting blades, and
extending radially outward of the rotation axis to a radially outermost blade tip, the blade tip extending axially and having a first tip portion connected to an axially adjacent second tip portion, the first and second tip portions being angled relative to the axis of rotation so that the blade tip has a V-shape; and
an annular pre-rotor flow recirculation passage defined between the rotor housing and the rotor,
the recirculation passage surrounding the rotor,
the recirculation passage extending from a recirculation passage upstream end to a recirculation passage downstream end,
the recirculation passage downstream end being open ended and providing fluid continuity from the recirculation passage downstream end to the recirculation passage upstream end,
the recirculation passage having a passage cross-sectional area that decreases gradually from the recirculation passage upstream end to the recirculation passage downstream end.
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