US 12,292,027 B2
Wind turbine with particular combined radius specific solidities along the rotor radius
Stephen Randall, Cowes (GB); Andrea Attorni, Cowes (GB); Thomas Potentier, Saint-Mars-du-Désert (FR); and Francesco Grasso, Oporto (PT)
Assigned to Vestas Wind Systems A/S, Aarhus N. (DK)
Appl. No. 18/002,507
Filed by Vestas Wind Systems A/S, Aarhus N (DK)
PCT Filed Jun. 29, 2021, PCT No. PCT/DK2021/050215
§ 371(c)(1), (2) Date Dec. 20, 2022,
PCT Pub. No. WO2022/002333, PCT Pub. Date Jan. 6, 2022.
Claims priority of application No. PA 202070425 (DK), filed on Jun. 29, 2020.
Prior Publication US 2023/0235721 A1, Jul. 27, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. F03D 1/06 (2006.01)
CPC F03D 1/0633 (2013.01) [F03D 1/0641 (2013.01); F05B 2240/221 (2013.01); F05B 2240/301 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A horizontal axis wind turbine comprising a rotor having a plurality of blades, the rotor having a radius of at least 80 meters, the blades comprising:
a root end and a tip end;
a leading edge and a trailing edge;
a shoulder between the root end and the tip end where a chord length defined between the leading edge and the trailing edge is at a maximum;
wherein:
Solr is at least 0.0146 at 0.7R;
Solr is at least 0.0123 at 0.8R;
Solr is at least 0.0099 at 0.9R;
Solr is below 0.0164 at 0.7R;
Solr is below 0.0133 at 0.8R;
Solr is below 0.0108 at 0.9R;
Solr being a combined radius specific solidity of the blades and is defined by:

OG Complex Work Unit Math
where n=the number of blades, r denotes a specific radius, Cr=the chord length at the specific radius, and R=the rotor radius, and
wherein a ratio

OG Complex Work Unit Math
is greater than 0.5, wherein the ratio is the combined radius specific solidity of the blades at 0.7R to the combined radius specific solidity of the blades at the shoulder of the blades.