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Horizontal-axis wind turbine tower frame based on fractal science

A machine tower and wind power technology, applied in the field of wind power generators, can solve problems such as increased cost and complicated installation process, and achieve the effects of saving costs, reducing the use of materials, and weakening the tower shadow effect

Inactive Publication Date: 2017-01-25
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as wind turbines gradually show a trend of large-scale and large-capacity development, the cost of adding protective devices outside the tower increases, and the installation process is complicated

Method used

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  • Horizontal-axis wind turbine tower frame based on fractal science
  • Horizontal-axis wind turbine tower frame based on fractal science
  • Horizontal-axis wind turbine tower frame based on fractal science

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Experimental program
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Effect test

Embodiment Construction

[0018] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0019] figure 1 It is a schematic diagram of the Karman vortex street phenomenon. When the incoming flow 1 blows through the tower 4, the two sides of the tower 4 will periodically fall out of the double row vortex 6 with opposite rotation direction and regular arrangement, and form a Karman vortex after nonlinear action street. The alternate occurrence of back vortices in the Karman vortex street will generate alternating lateral forces perpendicular to the flow direction on the tower 4, which will cause the tower 4 to vibrate and affect the stability of the tower 4. As a load-bearing connection part of the wind power generation device, the vibration of the tower 4 is very harmful.

[0020] Such as figure 2 As shown, the fractal-based horizontal axis wind turbine tower of the present invention includes a tower part and a fractal structu...

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Abstract

The invention relates to a horizontal-axis wind turbine tower frame based on fractal science. Fractal structures are arranged on the tower frame and are third-order Sierpinski triangles. The tower frame is a cone cylinder type tower frame. A tower shadow effect can be effectively weakened based on the fractal structures of the third-order Sierpinski triangles to reduce the influence of an incoming flow on downstream wind turbines. The Karman vortex street phenomenon can be weakened by adopting the fractal structures, resonance caused by a Karman vortex street is reduced, and the stability of the wind turbine is improved. By the adoption of the wind turbine tower frame provided with the fractal structures, the material usage amount can be decreased to some degree, and the costs are saved.

Description

technical field [0001] The invention relates to a wind power generator, in particular to a wind power generator tower. Background technique [0002] The increasingly serious environmental pollution, energy shortage and safety issues have drawn much attention to the development and utilization of wind energy. Wind power resources have the characteristics of large reserves, abundant sources, safety and reliability, clean and renewable, and zero greenhouse gas emissions. It is widely believed that it may replace traditional fossil fuels and become the main force of new power supply in the future. As the key equipment of wind power generation, wind turbine plays an extremely important role in the development of wind power. The load on the wind turbine tower and the tower shadow effect associated with the tower will seriously affect the wind energy utilization of the wind turbine. [0003] When the steady flow under certain conditions bypasses the tower, the two sides of the to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D13/20
CPCY02E10/72Y02E10/728Y02P70/50
Inventor 李春李洋杨阳张万福阳君丁勤卫郝文星
Owner UNIV OF SHANGHAI FOR SCI & TECH
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