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Vane of wind generating set

A technology of wind turbines and blades, which is applied to wind engines, wind engines consistent with the wind direction, and wind power generation. The effect of improving wind energy utilization and improving power generation efficiency

Active Publication Date: 2015-01-21
JIANGSU NEW UNITED HEAVY IND SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of blade is short in length and cannot be applied to the use requirements of wind turbines with large power generation or equal to 2MW

Method used

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Embodiment Construction

[0032] The present invention will be further described now in conjunction with accompanying drawing. These drawings are simplified schematic diagrams only to illustrate the basic structure of the present invention in a schematic way, so they only show the components relevant to the present invention.

[0033] A blade of a wind power generating set, the length of the blade is L=50.5m, and the radius of the rotor corresponding to the blade is R=52m.

[0034] The aerodynamic shape of the blade section at the position where the relative radius r / R of the wind rotor is 18.25-99.05% is:

[0035] 1) Use a modified airfoil with a relative thickness of 55.5-17.5%;

[0036] 2) The chord length is 3780-520mm;

[0037] 3) The twist angle relative to the chord line of the blade tip section is 11.75-1.05°;

[0038] 4) The lift coefficient of the design point is 1.35~1.02;

[0039] 5) The design Reynolds number is 1.0×10 6 ~8×10 6 .

[0040] The aerodynamic shape of the blade section ...

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Abstract

The invention relates to a vane of a wind generating set. The length L of the vane is 50.5m, and the radius R of a wind wheel corresponding to the vane is 52m. When the relative radius r / R of the wind wheel is 18.25-99.05%, the aerodynamic shape of a vane section is characterized in that a patched-type airfoil profile with a relative thickness of 55.5-17.5% is used; the chord length of the vane section is 3780-520mm; the torsion angle of opposite chord lines of a vane tip section is 11.75-1.05 degrees; the lift coefficient of a design point is 1.35-1.02; and the design Reynolds number is 1.0*106-8*106. According to the vane of the wind generating set, wind-power utilization coefficients of wind wheels of three vanes exceed 0.45 when the tip speed ratio of each vane with the length L of 50.5m is in the range of 7-11.5, therefore the utilization rate of wind energy is greatly improved, and generating efficiency of a wind power generator is improved.

Description

technical field [0001] The invention relates to a blade of a wind power generating set, in particular to the aerodynamic shape of the blade which affects the aerodynamic performance of the wind rotor. Background technique [0002] Large horizontal axis wind turbines are the main form of wind energy utilization at present, and the aerodynamic shape of the wind rotor blades is the most critical and decisive factor for the wind energy absorption efficiency of the wind turbine system. Generally, to determine the aerodynamic shape of the blade, first select a group of airfoils for the design of the aerodynamic shape of the blade, whose relative thickness ranges from 12% to 50%, and then determine the width (chord length) and twist angle of the blade. and the relative thickness distribution to obtain the aerodynamic shape of the blade. [0003] At present, the aerodynamic shape design of the mainstream blades is coordinated with the structural design, providing a comprehensive de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D1/06
CPCY02E10/721Y02E10/72
Inventor 相海军
Owner JIANGSU NEW UNITED HEAVY IND SCI & TECH
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