Noise reducer for a wind turbine rotor blade having a cambered serration

US10746157B2 · kind B2 · utility

Assignee

• General Electric Company · US

Inventors

• Guannan Wang · Beijing, CN
• Benoit Petitjean · Moosburg an der Isar, DE
• Andreas Herrig · Garching an der Alz, DE
• Roger Drobietz · Salem, DE

Key dates

• Filing date: Aug 31, 2018
• Grant date: Aug 18, 2020
• Expiry date: Nov 9, 2038

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E10/72
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A rotor blade assembly for a wind turbine includes a rotor blade having surfaces defining a pressure side, a suction side, a leading edge, and a trailing edge extending between a blade tip and a blade root. The rotor blade assembly also includes at least one noise reducer adjacent to the trailing edge. The noise reducer(s) includes at least one serration extending beyond the trailing edge in a chord-wise direction of the rotor blade. The serration(s) also includes a suction side surface and a pressure side surface. The suction side surface defines a first radius of curvature in the chord-wise direction and the pressure side surface defines a second radius of curvature in the chord-wise direction. Further, the first radius of curvature may be larger than the second radius of curvature such that the suction side surface is flatter than the pressure side surface or vice versa.