Prime-mover dynamo plants – Fluid-current motors – Wind
Patent
1980-07-09
1982-04-13
Miller, J. D.
Prime-mover dynamo plants
Fluid-current motors
Wind
415 3, 440 8, F03D 704, F03D 104
Patent
active
043249850
ABSTRACT:
In a wind turbine assembly incorporating a diffuser, the diffuser includes an articulated duct formed of a set of members, such as the sectors of a conic section, which are pivotable about axes in a plane normal to the turbine axis. To permit an enlargement or contraction of the articulated duct, the members are joined by flexible gussets or, alternatively, are configured for overlapping. Springs offset from the pivoting axes are attached to the members to provide a bistable attitude thereto. In response to high winds, the spring forces are overcome by the wind forces on the articulated duct to allow the members to pivot inwardly reducing the effective wind capture area of the diffuser. The diffuser is further fabricated with slots between sections of duct to enlarge the effective area swept by the turbine blades for increased power availability from the turbine.
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Grumman Aerospace Corp.
Miller J. D.
Rebsch D. L.
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