公开(公告)号：US09951749B2

公开(公告)日：2018-04-24

申请号：US14437641

申请日：2013-10-24

Applicant: LM WP PATENT HOLDING A/S

Inventor： Ashish Singh ,  Ganesh Ramanathan ,  Jitendra Bijlani ,  Naveen Parihar

IPC: F03D1/06 ,  F03D7/02 ,  F03D80/00

CPC classification number: F03D1/065 ,  F03D1/0641 ,  F03D1/0683 ,  F03D7/0296 ,  F03D80/00 ,  Y02E10/721 ,  Y02E10/723

Abstract: A system and method for reducing the operational noise of a blunt trailing edge of a wind turbine blade is described. The system involves increasing the trailing edge solid angle at the blade trailing edge by providing a wedge element or projection adjacent the trailing edge of the blade, the wedge element acting to provide improved mixing of the suction side and pressure side flows at the blunt trailing edge, thereby reducing the strength of vortex shedding at the trailing edge and the associated operational noise.

公开(公告)号：US09617974B2

公开(公告)日：2017-04-11

申请号：US14360125

申请日：2012-11-15

Applicant: LM WP PATENT HOLDING A/S

Inventor： Ashish Singh

IPC: F03D1/06

CPC classification number: F03D1/0683 ,  F03D1/0633 ,  F05B2240/32 ,  F05B2250/183 ,  F05B2260/96 ,  Y02E10/721

Abstract: A wind turbine blade is described having noise reduction features. The blade has a plurality of projecting serrations provided at the blade trailing edge to reduce the scattering noise produced during operation of the blade, wherein the serrations have a plurality of through-going apertures defined in the serration body. The apertures act to provide a pressure equalization effect at the serrations between the suction and pressure sides. This pressure equalization provides for improved noise reduction performance, as well as a reduction in mechanical stresses and strains which may be experienced by the serrations, increasing serration lifetime.

公开(公告)号：US20150292522A1

公开(公告)日：2015-10-15

申请号：US14437641

申请日：2013-10-24

Applicant: LM WP PATENT HOLDING A/S

Inventor： Ashish Singh ,  Ganesh Ramanathan ,  Jitendra Bijlani ,  Naveen Parihar

IPC: F04D29/66 ,  F03D1/06

CPC classification number: F03D1/065 ,  F03D1/0641 ,  F03D1/0683 ,  F03D7/0296 ,  F03D80/00 ,  Y02E10/721 ,  Y02E10/723

Abstract: A system and method for reducing the operational noise of a blunt trailing edge of a wind turbine blade is described. The system involves increasing the trailing edge solid angle at the blade trailing edge by providing a wedge element or projection adjacent the trailing edge of the blade, the wedge element acting to provide improved mixing of the suction side and pressure side flows at the blunt trailing edge, thereby reducing the strength of vortex shedding at the trailing edge and the associated operational noise.

Abstract translation: 描述了用于降低风力涡轮机叶片的钝尾缘的操作噪声的系统和方法。 该系统包括通过提供与叶片的后缘相邻的楔形元件或突起来增加叶片后缘处的后缘立体角，该楔形元件用于在钝的后缘提供改进的吸力侧和压力侧流的混合 ，从而降低后缘涡流脱落的强度和相关的操作噪声。

公开(公告)号：US20140301864A1

公开(公告)日：2014-10-09

申请号：US14360218

申请日：2012-11-15

Applicant: LM WP PATENT HOLDING A/S

Inventor： Ashish Singh

IPC: F03D7/02 ,  F03D1/06 ,  F03D7/04

CPC classification number: F03D7/022 ,  F03D1/0608 ,  F03D1/0633 ,  F03D1/0641 ,  F03D1/065 ,  F03D1/0675 ,  F03D3/061 ,  F03D7/04 ,  F03D80/00 ,  F05B2250/183 ,  F05B2260/96 ,  Y02E10/721 ,  Y02E10/74

Abstract: A wind turbine blade is described having noise reduction features. The blade has a plurality of projecting elements provided at the blade trailing edge to reduce the scattering noise produced during operation of the blade. The blade further comprises a fluid injection system which can inject a fluid into the turbulent airflow at the trailing edge of the blade, to absorb some of the turbulent kinetic energy at the trailing edge and accordingly further reduce the levels of output noise produced by the blade. In a further aspect, the fluid injection system may be adjustable to inject fluid in an upstream direction, i.e. against the oncoming airflow, in order to provide an increased absorption of turbulent kinetic energy from the incident airflow, and accordingly to provide improved noise-reduction characteristics.

Abstract translation: 描述了具有降噪特征的风力涡轮机叶片。 叶片具有设置在叶片后缘处的多个突出元件，以减少叶片操作期间产生的散射噪声。 叶片还包括流体喷射系统，其可以将流体注入到叶片后缘处的湍流气流中，以吸收后缘处的一些湍动动能，从而进一步降低由叶片产生的输出噪声的水平 。 在另一方面，流体注射系统可以是可调节的，以在上游方向（即，抵靠迎面而来的气流）注入流体，以便提供来自入射气流的湍流动能的增加的吸收，并因此提供改善的降噪 特点

公开(公告)号：US09945352B2

公开(公告)日：2018-04-17

申请号：US14414869

申请日：2013-07-24

Applicant: LM WP PATENT HOLDING A/S

Inventor： Arun Kumar ,  Ashish Singh

IPC: F03D11/00 ,  F03D1/06

CPC classification number: F03D1/0641 ,  F03D1/0675 ,  Y02E10/721

Abstract: A wind turbine blade is described wherein at least on planar member is provided on the blade surface, where the planar member is arranged such that it extends at an angle to the chord of the blade. The planar member acts to re-direct airflow over the blade, to improve wind turbine performance. The planar member may be a stall fence provided towards the blade root end, further acting to divert airflow towards the root end of the blade to prevent separation of attached airflow. Additionally or alternatively, the planar member may be a flow diverter provided towards the blade tip end, to increase airflow in the tip region for increased performance and/or to disrupt the formation of tip vortices.

公开(公告)号：US20150176564A1

公开(公告)日：2015-06-25

申请号：US14414869

申请日：2013-07-24

Applicant: LM WP PATENT HOLDING A/S

Inventor： Arun Kumar ,  Ashish Singh

IPC: F03D1/06

CPC classification number: F03D1/0641 ,  F03D1/0675 ,  Y02E10/721

Abstract: A wind turbine blade is described wherein at least on planar member is provided on the blade surface, where the planar member is arranged such that it extends at an angle to the chord of the blade. The planar member acts to re-direct airflow over the blade, to improve wind turbine performance. The planar member may be a stall fence provided towards the blade root end, further acting to divert airflow towards the root end of the blade to prevent separation of attached airflow. Additionally or alternatively, the planar member may be a flow diverter provided towards the blade tip end, to increase airflow in the tip region for increased performance and/or to disrupt the formation of tip vortices.

Abstract translation: 描述了风力涡轮机叶片，其中至少在平面构件设置在叶片表面上，其中平面构件布置成使得其以与叶片的弦一角的角度延伸。 平面构件用于将气流重新引导到叶片上，以改善风力涡轮机性能。 平面构件可以是朝向叶片根部端设置的失速挡板，进一步用于将气流朝向叶片的根部端部转向以防止附着的气流的分离。 附加地或替代地，平面构件可以是朝向叶片尖端设置的分流器，以增加尖端区域中的气流以增加性能和/或破坏顶端涡流的形成。

公开(公告)号：US20140286784A1

公开(公告)日：2014-09-25

申请号：US14360125

申请日：2012-11-15

Applicant: LM WP PATENT HOLDING A/S

Inventor： Ashish Singh

IPC: F03D1/06

CPC classification number: F03D1/0683 ,  F03D1/0633 ,  F05B2240/32 ,  F05B2250/183 ,  F05B2260/96 ,  Y02E10/721

Abstract: A wind turbine blade is described having noise reduction features. The blade has a plurality of projecting serrations provided at the blade trailing edge to reduce the scattering noise produced during operation of the blade, wherein the serrations have a plurality of through-going apertures defined in the serration body. The apertures act to provide a pressure equalisation effect at the serrations between the suction and pressure sides. This pressure equalisation provides for improved noise reduction performance, as well as a reduction in mechanical stresses and strains which may be experienced by the serrations, increasing serration lifetime.

Abstract translation: 描述了具有降噪特征的风力涡轮机叶片。 叶片具有设置在叶片后缘处的多个突出锯齿，以减少在叶片操作期间产生的散射噪声，其中锯齿具有限定在锯齿体中的多个贯穿孔。 这些孔用于在吸力侧和压力侧之间的锯齿处提供压力平衡效果。 这种压力均衡提供了改进的降噪性能，以及锯齿可能经历的机械应力和应变的降低，增加了锯齿寿命。