A lift-type blade airfoil of a vertical axis wind turbine
A technology for wind turbines and lift blades, which is applied to wind turbines, wind turbines at right angles to the wind direction, engines, etc., can solve the problems of low maximum lift-to-drag ratio, low working capacity, and sensitivity to leading edge roughness. , to achieve the effect of increasing the thickness of the airfoil, improving the structural strength, and improving the wind energy utilization coefficient
Inactive Publication Date: 2018-08-03
SHENZHEN SHENTIANMENGYE NEW ENERGY
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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;
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[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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A lift-type blade airfoil of a vertical axis wind turbine, which improves the shortcomings of the symmetrical airfoil, such as the sensitivity of the maximum lift coefficient to the roughness of the leading edge, poor stall characteristics, low maximum lift-drag ratio, and low workability. The maximum camber of the blade airfoil is 19.8% at the 30.4% chord; (2) The maximum curved surface of the blade airfoil is 0.59% at the 22.3% chord. (3) Radius of leading edge of blade airfoil is 1.8523%; (4) Thickness of trailing edge of blade airfoil is 0.15%. The beneficial effect of the present invention is that the airfoil of the present invention covers a wider range of attack angles between the Reynolds number of 150,000 and 700,000, and there is no laminar flow separation at the trailing edge to reduce noise. The stall occurs after a large angle of attack, and the lift coefficient decreases limitedly after the stall, and the reduction of the maximum lift coefficient is sensitive to the roughness of the leading edge, which generally improves the wind energy utilization coefficient. The theoretical wind energy utilization efficiency reaches 0.48. At the same time, the increase in the thickness of the airfoil improves the structural strength.
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...
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IPC IPC(8): F03D3/06
CPCY02E10/74
Inventor 郁志田
Owner SHENZHEN SHENTIANMENGYE NEW ENERGY