Wind turbine rotor blade assembly for reduced noise

US11781522B2 · kind B2 · utility

Assignee

• General Electric Company · US

Inventors

• Christian A. Carroll · Simpsonville, US
• Murray Fisher · Greer, US
• Benoit Petitjean · Moosburg an der Isar, DE
• Andreas Herrig · Garching an der Alz, DE
• Drew Adam Wetzel · Easley, US
• Jonathon P. Baker · Roseville, US

Key dates

• Filing date: Aug 17, 2021
• Grant date: Oct 10, 2023
• Expiry date: Nov 27, 2041

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 of a wind turbine includes a rotor blade having an aerodynamic body with an inboard region and an outboard region. The inboard and outboard regions define a pressure side, a suction side, a leading edge, and a trailing edge. The inboard region includes a blade root, whereas the outboard region includes a blade tip. The rotor blade also defines a chord and a span. Further, the inboard region includes a transitional region of the rotor blade that includes a maximum chord. Moreover, a unitless first derivative of the chord with respect to the span of the rotor blade in the transitional region ranges from about −0.10 to about 0.10 from the maximum chord over about 15% of the span of the rotor blade. In addition, the unitless first derivative of the chord with respect to the span a slope of a change in the chord in is greater than about −0.03 at an inflection point of the chord in the outboard region.