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Vertical axis wind turbine curved blades with twist angle

A technology of curved blades and vertical axis, applied in the field of curved blades of vertical axis wind turbines, can solve the problem of not being able to maximize the energy conversion efficiency of the blades, reduce the functional force of the equatorial part, etc., achieve high instantaneous torque, improve operating efficiency, and achieve self-starting effect

Active Publication Date: 2018-04-17
SHANGHAI JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the curved blade rotates to a certain azimuth angle, due to the small speed type, the angle of attack at the upper and lower ends of the blade is much larger than that of the equatorial section of the blade, which makes it easier for the upper and lower ends of the blade to enter the stall state and reduce the The working ability of the equatorial part cannot be maximized, and the energy conversion efficiency of the blade cannot be maximized.

Method used

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  • Vertical axis wind turbine curved blades with twist angle
  • Vertical axis wind turbine curved blades with twist angle
  • Vertical axis wind turbine curved blades with twist angle

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Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0023] Please also see Figure 1 to Figure 6 , a curved blade of a vertical axis wind turbine with a twist angle, the curved blade has different twist angles between the airfoils in the span direction, and the smooth transition forms a complete blade, with clockwise as the positive direction, The twist angle of each cross-section of the blade is between 0° and 25°.

[0024] The twist angle is relative to the position of the equator of the blade. The angle between the blade shape on the other cros...

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Abstract

The invention provides a curved blade of a vertical axis wind turbine with a torsion angle. There are different torsion angles between the airfoils of each part of the curved blade along the spanwise direction. With clockwise as the positive direction, the torsion of each cross-section of the blade in the spanwise direction is The angle is between 0° and 25°. The curved blade is mainly used in Daryl wind turbines, and its profile is troposkien, parabolic or straight-arc-straight. The invention has the beneficial effects of being able to reduce the stall effect, provide higher instantaneous torque, realize the self-starting of the wind turbine at low wind speed, and effectively improve the operating efficiency of the vertical axis wind turbine.

Description

technical field [0001] The invention relates to a blade of a wind turbine, in particular to a curved blade of a vertical axis wind turbine with a torsion angle. Background technique [0002] The current shortage of energy in the world and the deterioration of the environment have prompted more people to turn to wind energy, which is rich in energy. To develop wind energy, the design and optimization of wind turbines are the focus of all aspects. [0003] There are two types of wind turbines: horizontal axis wind turbines and vertical axis wind turbines. Relevant studies have shown that compared with horizontal axis wind turbines, vertical axis wind turbines do not depend on wind direction, do not require yaw equipment, are more compact, simple in structure, easy to maintain, and are easier to miniaturize and install in cities and remote mountainous areas. [0004] The running speed of the drag-type vertical-axis wind turbine is not high, and the efficiency is also low. At ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D3/06
CPCY02E10/74
Inventor 司徒达志沈昕杜朝辉竺晓程欧阳华田杰
Owner SHANGHAI JIAOTONG UNIV
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