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A robust aerodynamic optimization design method for thick airfoil inside a wind turbine blade

A robust optimization and optimization design technology, applied in wind turbines, wind turbines, mechanical equipment and other directions that are consistent with the wind direction, and can solve problems such as the inability to accurately characterize the Reynolds number

Active Publication Date: 2019-03-12
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

However, for thick airfoils, the Reynolds number effect is nonlinear, and the above method cannot accurately characterize the influence of Reynolds number uncertainty. A true random method must be used to obtain the statistical characteristics of the aerodynamic characteristics of the airfoil.

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  • A robust aerodynamic optimization design method for thick airfoil inside a wind turbine blade
  • A robust aerodynamic optimization design method for thick airfoil inside a wind turbine blade
  • A robust aerodynamic optimization design method for thick airfoil inside a wind turbine blade

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Embodiment Construction

[0048] In order to make the object, technical solution and advantages of the present invention clearer, the technical solutions and advantages of the present invention will be described in detail below in conjunction with examples and accompanying drawings.

[0049] At present, the relative thickness of the airfoil used on the inner side of multi-megawatt blades, especially near the blade root, is as high as 40%, and the airfoil at this part mostly adopts blunt trailing edge shape to further improve the structural rigidity and strength of the inner part of the blade. need. At present, the mainstream models of horizontal axis wind turbines in my country's wind farms are 2MW / 3MW models. Therefore, a certain 2MW class blade is selected as the reference blade in the case of the present invention. The target airfoil is the wind turbine airfoil at the 20% spanwise position inside the blade, and the relative thickness is 45%. When the blade is working normally (between cut-in and c...

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Abstract

A method for aerodynamic robust optimization design of thick airfoil on that inner side of wind turbine blade According to the uncertainty of Reynolds number of incoming flow in the actual operation of wind turbine blades, Taking the maximum lift coefficient of airfoil and the probability statistics of stall characteristic parameters under random Reynolds number as the characteristic parameters ofairfoil affected by Reynolds number uncertainty, the robust optimization objective function of thick airfoil is formed by using the weight coefficient method and the aerodynamic lift characteristicsof airfoil at high angle of attack. A robust optimization design method for thick airfoil is proposed based on the geometrical characteristics of airfoil and genetic algorithm. The numerical prediction and evaluation of the optimization result of the concrete case show that the robust optimization design method of the large-thickness airfoil proposed by the invention can make the new airfoil obtain a high aerodynamic lift level in the range of a large angle of attack, and further improve the robustness of the aerodynamic characteristics of the airfoil with Reynolds number change, thereby realizing the design requirements.

Description

technical field [0001] The invention belongs to the technical field of horizontal axis wind turbine airfoil design, and relates to a design method for a thick airfoil inside a wind turbine blade, in particular to an optimization of the aerodynamic stability of a thick airfoil inside a wind turbine blade under an uncertain inflow Reynolds number design method. Background technique [0002] Under the current wind turbine blade design system, the aerodynamic design of the three-dimensional blade is still based on the performance of the two-dimensional airfoil. The aerodynamic performance of the airfoil fundamentally determines the wind energy conversion efficiency and load characteristics of the wind turbine blade. Therefore, the development of a special airfoil for wind turbines with excellent performance is the basic method to improve the wind energy capture efficiency and operational reliability of wind turbine blades. [0003] Based on the contradiction between the intern...

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Application Information

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IPC IPC(8): G06F17/50F03D1/06
CPCF03D1/0675G06F2111/06G06F30/17Y02E10/72
Inventor 李星星宋娟娟张磊杨科
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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