公开(公告)号：US10240576B2

公开(公告)日：2019-03-26

申请号：US14952041

申请日：2015-11-25

Applicant: General Electric Company

Inventor： Lorenz Edwin Drack ,  Thierry Pascal Maeder ,  Roger Drobietz

IPC: F03D1/06

Abstract: A wind turbine blade includes a trailing edge including a radially inboard portion and a radially outboard portion opposite the radially inboard portion. The trailing edge further includes at least one serrated portion extending at least partially between the radially inboard portion and the radially outboard portion. The serrated portion includes at least one substantially acoustically absorbent material.

公开(公告)号：US20170248127A1

公开(公告)日：2017-08-31

申请号：US15052993

申请日：2016-02-25

Applicant: General Electric Company

Inventor： Roger Drobietz ,  Hans-Gerd Runde ,  Martin Duettmann ,  Andreas Petersen ,  Markus Koschinsky ,  Bernd Klaas

IPC: F03D80/80 ,  F03D13/20

Abstract: The present disclosure is directed to a system and method for reducing audible tonality of a wind turbine caused by vibrations generated by the drivetrain assembly thereof. The system includes a plurality of damping elements mounted at a plurality of locations on an inner surface of a tower of the wind turbine, the plurality of locations having vibration levels above a predetermined threshold. Thus, during operation of the wind turbine, the plurality of damping elements are configured to damp vibrations of the tower so noise generated thereby.

公开(公告)号：US20170145990A1

公开(公告)日：2017-05-25

申请号：US14952041

申请日：2015-11-25

Applicant: General Electric Company

Inventor： Lorenz Edwin Drack ,  Thierry Pascal Maeder ,  Roger Drobietz

IPC: F03D7/02 ,  F03D1/06 ,  F03D1/00

CPC classification number: F03D1/0641 ,  F05B2260/964 ,  Y02E10/721

Abstract: A wind turbine blade includes a trailing edge including a radially inboard portion and a radially outboard portion opposite the radially inboard portion. The trailing edge further includes at least one serrated portion extending at least partially between the radially inboard portion and the radially outboard portion. The serrated portion includes at least one substantially acoustically absorbent material.

公开(公告)号：US20140093380A1

公开(公告)日：2014-04-03

申请号：US13644130

申请日：2012-10-03

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Roger Drobietz ,  Thierry Pascal Maeder ,  Gowri Sengundermudaliar ,  Lorenz Edwin Drack ,  Andreas Herrig ,  Christian A. Carroll

IPC: F03D1/06

CPC classification number: F03D1/0641 ,  F03D1/0683 ,  F05B2240/301 ,  F05B2260/962 ,  Y02E10/721

Abstract: Rotor blade assemblies for wind turbines and methods for reducing rotor blade noise are disclosed. A rotor blade assembly includes a rotor blade having external surfaces defining a pressure side, a suction side, a leading edge, and a trailing edge extending between a tip and a root. The rotor blade further defines a span and a chord. The rotor blade assembly further includes a tab. The tab includes an inner surface, an outer surface, a forward end and an aft end. The inner surface is mounted to one of the pressure side or the suction side. The outer surface has a cross-sectional profile configured to modify an operational value of the rotor blade at the trailing edge. The forward end is disposed within the chord.

Abstract translation: 公开了用于风力涡轮机的转子叶片组件以及用于降低转子叶片噪声的方法。 转子叶片组件包括具有限定压力侧，吸力侧，前缘和在尖端和根部之间延伸的后缘的外表面的转子叶片。 转子叶片进一步限定跨度和弦。 转子叶片组件还包括翼片。 突片包括内表面，外表面，前端和后端。 内表面安装在压力侧或吸力侧之一。 外表面具有构造成在后缘修改转子叶片的操作值的横截面轮廓。 前端设置在和弦之内。