Wind power generation blade and wind power generating set with the blade
A technology for wind power generation blades and wind power generators, which is applied to wind power generators, wind power generation, engines, etc., can solve the problems of increased high-frequency noise, decreased aerodynamic performance of blades, and limited noise reduction effect, and achieves enhanced noise reduction effects and reduced noise. Noise effect is good, the effect of reducing noise radiation efficiency
Active Publication Date: 2018-10-19
BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
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Problems solved by technology
The sawtooth trailing edge can achieve a certain noise reduction effect, but the noise reduction effect is limited, because its noise reduction is at the expense of increasing high-frequency noise
The noise reduction effect of porous materials is better than that of sawtooth trailing edge in principle and experimental measurement results, but laying porous materials on the surface of the blade will affect the aerodynamic performance of the blade, resulting in a decrease in the aerodynamic performance of the blade, which is unacceptable to wind turbines
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[0037] In general, the wind power generation blade according to the present invention can be applied to a wind power generating set (for example, a MW class wind generating set). The wind power blade is a three-dimensional entity composed of blade tip, blade root, blade pressure surface, blade suction surface, blade leading edge and blade trailing edge. The straight-line distance from the blade tip to the blade root is called the blade length, and the straight-line distance from any position on the blade to the blade root is called the spread length. The same span section of the blade is the airfoil, and the straight-line distance between the leading edge and the trailing edge of the airfoil is the chord length c. Since the chord length of the airfoil at different spanwise positions is different, it is called the local chord length. According to various exemplary embodiments of the present invention, the wind power generation blade further includes a noise reduction accessory ...
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The invention provides a wind power generation blade and a wind generating set with the blade. The wind power generation blade comprises a blade body and noise reduction accessories, wherein a blade tip, a blade root, and a blade pressure surface, a blade suction surface, a blade front edge and a blade tail edge which extend between the blade tip and the blade root are defined on the blade body; the noise reduction accessories are arranged on the blade tail edge and comprise a plurality of combs / fur brush groups; and the plurality of combs / fur brush groups are arranged in a staggered manner along the blade tail edge. According to the wind power generation blade, the noise of the blade can be reduced under the condition that the aerodynamic performance of the blade is not influenced.
Description
technical field [0001] The present invention generally relates to a wind power generation blade and a wind power generating set with the blade, and more specifically relates to a noise reduction accessory arranged on the wind power generation blade. Background technique [0002] The main noise source of MW-level wind turbines comes from the rotating blades, and the main noise source of the blades is located at the trailing edge of the blades. Experiments have confirmed that the effective noise reduction technology is mainly to adhere to the trailing edge of the blades for noise reduction. Attachments or laying porous sound-absorbing materials on the surface of the blade can change the acoustic impedance characteristics of the blade surface. [0003] The existing various noise reduction accessories and impedance surfaces can reduce the noise mainly in two aspects: 1. By changing the direction of the shedding vortex at the blade trailing edge, the intensity of the shedding vor...
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IPC IPC(8): F03D80/00
CPCY02E10/72
Inventor 杨炯明杨兵
Owner BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD