US 11,927,175 B2
Rotor blade with noise reduction
Steven Buck, Boulder, CO (US); and Stefan Oerlemans, Herning (DK)
Assigned to Siemens Gamesa Renewable Energy A/S, Brande (DK)
Appl. No. 17/765,868
Filed by Siemens Gamesa Renewable Energy A/S, Brande (DK)
PCT Filed Sep. 25, 2020, PCT No. PCT/EP2020/076991
§ 371(c)(1), (2) Date Apr. 1, 2022,
PCT Pub. No. WO2021/078471, PCT Pub. Date Apr. 29, 2021.
Claims priority of application No. 19204871 (EP), filed on Oct. 23, 2019.
Prior Publication US 2022/0349380 A1, Nov. 3, 2022
Int. Cl. F03D 7/02 (2006.01); G10K 11/178 (2006.01)
CPC F03D 7/0296 (2013.01) [G10K 11/17857 (2018.01); F05B 2260/962 (2013.01); G10K 2210/121 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A rotor blade with a leading edge and a trailing edge, wherein
the rotor blade is designed and configured for being exposed to a fluid flowing substantially from the leading edge to the trailing edge,
the rotor blade comprises at least three sensors designed for detecting flow characteristics of the fluid and providing respective sensor signals, wherein the sensors are arranged in a line with a non-uniform spacing between adjacent sensors, and
the rotor blade further comprises at least one actuator for producing an anti-noise signal based on a sensor signal,
the sensors and the actuator are arranged at the surface of the rotor blade, and
the actuator is arranged and prepared such that flow-induced edge noise of the rotor blade, which is generated by the fluid, is at least partly cancelled out by the anti-noise signal.