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Blade power increasing system with trailing edge being thickened

A blade and blunt trailing edge technology, which is applied in the field of blade power augmentation system, can solve problems such as the increase of drag coefficient, and achieve the effects of reducing drag coefficient, improving lift-drag coefficient, and improving trailing edge shedding vortex

Active Publication Date: 2021-07-09
HUANENG CLEAN ENERGY RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a blade power augmentation system with thickened trailing edge to solve the problem of increased drag coefficient after the thickness of the trailing edge is increased, and how to optimize the trailing edge of the blade of the operating unit to achieve quality and efficiency improvement Purpose

Method used

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  • Blade power increasing system with trailing edge being thickened
  • Blade power increasing system with trailing edge being thickened
  • Blade power increasing system with trailing edge being thickened

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Embodiment approach

[0041] In order to clearly understand the technical means, creative features, goals and effects achieved by the present invention, the present invention will be further elaborated below in conjunction with the accompanying drawings.

[0042] see Figure 1 to Figure 3 As shown, the present invention discloses a blade power booster system with a thickened trailing edge, which includes a blade airfoil main body 1 and a power booster device 2, the trailing edge part of the blade airfoil main body 1 is a blunt trailing edge 10 with a thickness, and A power booster 2 is provided on at least one of the suction surface 101 or the pressure surface 102 of the blunt trailing edge 10 of the blade airfoil main body 1 . The power booster 2 is wedge-shaped in cross section and includes a plurality of grooves 20 .

Embodiment 1

[0044] Such as Figure 4-8 As shown, as a preferred embodiment, in a blade power augmentation system with thickened trailing edge in the embodiment of the present invention, the blade airfoil main body 1 adopts DU00-W401 airfoil, the chord length c=1000mm, the width is 100mm, blunt The thickness of the trailing edge 10 is 10mm, the power booster 2 is installed on the pressure surface 102 of the blade airfoil main body 1, the contact surface between the power booster 2 and the blade airfoil main body 1 is a follow-up surface, the length X=45mm, and the thickness d= 3mm, the length L0 of the surface 21 in contact with the airflow in the power booster 2 =25mm, the wedge angle β=10° away from the trailing edge of the blade airfoil main body 1, the power booster 2 has 6 grooves 20 on the contact surface with the airflow, The distance between the grooves 20 is D=16 mm, the depth of the grooves 20 is 2 mm, and the opening direction of the grooves is θ=90°.

[0045] Use CFD to calcul...

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Abstract

The invention discloses a blade power increasing system with a trailing edge being thickened. The blade power increasing system comprises a blade airfoil body and a power increasing device. The blade airfoil body is provided with the blunt trailing edge. The power increasing device is mounted at the blunt trailing edge. The blade achieves both aerodynamic performance and structural safety, and the blunt trailing edge is beneficial to improvement on a trailing edge falling vortex and lift and resistance coefficients. The power increasing device is arranged on at least one of the suction face or the pressure face of the blunt trailing edge of the blade airfoil body, the lift coefficient of the blade is increased, the resistance coefficient is reduced, and the optimal lift-resistance ratio is effectively improved. The problem that the resistance coefficient is increased after the thickness of the trailing edge is increased is solved, the problem of how to optimize the blade trailing edge of a unit already running is solved, and the aim of improving quality and efficiency is achieved.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to a blade power augmentation system with thickened trailing edges. Background technique [0002] Wind turbine blades are the main components of wind turbines to capture wind energy, and there are many factors that determine the aerodynamic performance of blades, such as aerodynamic shape, airfoil, and structure. There are many ways to increase the power of the blades. The common ones are vortex generators that delay or suppress the stall, Gurney flaps that improve the trailing edge shedding vortex and increase the lift-to-drag ratio, trailing edge roughness optimization, and spoilers. The aerodynamic performance of the airfoil and the blade is improved by pasting or installing the corresponding power-enhancing accessories on the surface of the blade, and the ability of the blade to capture wind energy is improved. Therefore, the aerodynamic optimization design of airfoils and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D1/06
CPCF03D1/0675Y02E10/72
Inventor 张林伟蔡安民林伟荣许杨李媛袁晓旭杨博宇
Owner HUANENG CLEAN ENERGY RES INST
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