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Lift type blade airfoil for vertical-axis wind turbine generator system

A technology of wind turbines and lift-type blades, which is applied to wind turbines, wind turbines at right angles to the wind direction, engines, etc., and can solve problems such as low maximum lift-to-drag ratio, sensitive leading edge roughness, and low workability. Achieve the effects of improving structural strength, increasing airfoil thickness, and improving wind energy utilization coefficient

Inactive Publication Date: 2015-06-10
SHENZHEN SHENTIANMENGYE NEW ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Improve the shortcomings of symmetrical airfoils, such as the maximum lift coefficient is sensitive to the roughness of the leading edge, the stall characteristics are not good, the maximum lift-drag ratio is low, and the workability is not high;

Method used

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  • Lift type blade airfoil for vertical-axis wind turbine generator system
  • Lift type blade airfoil for vertical-axis wind turbine generator system
  • Lift type blade airfoil for vertical-axis wind turbine generator system

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Embodiment Construction

[0023] Referring to the accompanying drawings: the present invention is through a large amount of aerodynamic performance scientific tests and repeated test verification after the test data is corrected, and the key data of the following blade airfoils are obtained as follows:

[0024] (1) The maximum camber of the blade airfoil is 19.8% at the chord of 30.4%;

[0025] ⑵, the maximum surface 0.59% at 22.3% chord;

[0026] ⑶, airfoil leading edge radius 1.8523%;

[0027] ⑷, airfoil trailing edge thickness 0.15%.

[0028] The blade airfoil covers a wider range of angles of attack between 150,000 and 700,000 Reynolds numbers, and the absence of laminar flow separation at the trailing edge reduces noise. The stall occurs after a high angle of attack, and there is a limited decrease in the lift coefficient after the stall.

[0029] The blade airfoil of the present invention has good lift performance, specifically see attached figure 2 .

[0030] The blade airfoil of the prese...

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Abstract

The invention discloses a lift type blade airfoil for a vertical-axis wind turbine generator system and aims to improve the shortcomings of higher sensitivity of a maximum lift coefficient to leading edge roughness, poor stalling characteristics, lower maximum lift-to-drag ratio, low capacity for work and the like of a symmetric airfoil. According to the lift type blade airfoil, (1) the maximum camber 19.8 percent of the blade airfoil is at the 30.4 percent airfoil chord; (2) the maximum curvature 0.59 percent of the blade airfoil is at the 22.3 percent airfoil chord; (3) the leading edge radius of the blade airfoil is 1.8523 percent; (4) the trailing edge thickness of the blade airfoil is 0.15 percent. The lift type blade airfoil has the benefits that the attack angle range between the Reynolds number of 150,000 to 700,000 is wider, and the trailing edge is free of laminar separation, so that noise is reduced; stalling occurs after a high attack angle, and the lift coefficient is finitely reduced after stalling, so that the sensitivity of the maximum lift coefficient to the leading edge roughness is reduced, the overall wind energy utilization coefficient is improved, and the theoretical wind energy utilization efficiency reaches 0.48; in addition, the airfoil is thickened, so that structural strength is strengthened.

Description

[0001] The technical field [0002] The invention relates to a lift-type blade airfoil of a vertical-axis wind power generating set, in particular to a geometric shape of a lift-type blade airfoil of a vertical-axis wind power generating set. Background technique: [0003] The wind turbine is the core component of the wind power generating set, and it is a mechanical device that realizes the conversion of wind energy into rotating mechanical energy. The efficiency of the wind turbine directly determines the efficiency of the wind turbine and the economy of the wind turbine. The blade is the core component of the wind turbine. The basic parameters of the blade mainly include length, thickness, airfoil, torsion angle and chord length, etc. The aerodynamic characteristic parameters of the blade are directly related to the life and economy of the wind turbine. Control input parameters and target objects of the system during operation. [0004] The airfoil is the basic element of...

Claims

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Application Information

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IPC IPC(8): F03D3/06
CPCY02E10/74
Inventor 郁志田
Owner SHENZHEN SHENTIANMENGYE NEW ENERGY
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