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A Design Method of Flat Nose Split Airfoil Based on Parabolic Function

A technology of parabolic function and design method, applied in the direction of constraint-based CAD, design optimization/simulation, computer-aided design, etc., can solve the problems of researching separated airfoil design methods and few scholars, and achieve superior post-stall aerodynamic performance , Delayed stall characteristics, and improved stall aerodynamic performance

Active Publication Date: 2022-04-29
HUBEI UNIV OF TECH
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Problems solved by technology

[0002] At present, the research on the airfoil of wind turbine blades focuses on the aerodynamic performance of the continuous airfoil profile, and few scholars have studied the design method and aerodynamic performance of the separated airfoil

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  • A Design Method of Flat Nose Split Airfoil Based on Parabolic Function
  • A Design Method of Flat Nose Split Airfoil Based on Parabolic Function
  • A Design Method of Flat Nose Split Airfoil Based on Parabolic Function

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Embodiment

[0044] On the basis of the airfoil S818 developed by the U.S. Renewable Energy Laboratory (the maximum relative thickness of the airfoil is 24%), the present invention proposes an optimal design method for the flat-mouth separation airfoil based on a parabolic function. The maximum lift-to-drag ratio of the airfoil is the objective function, and the parameters of the two parabolas are the design variables. The design variables and related parameters are constrained, and the simulated annealing multi-objective evolutionary algorithm is used to realize the control and parameter optimization of the separated airfoil profile of the wind turbine. And the large-scale fluid calculation software fluent is coupled to the algorithm program to calculate the aerodynamic performance of the airfoil. Finally, the aerodynamic performance of the optimally designed S818 flat split airfoil and the American Renewable Energy Laboratory airfoil S818 was compared and analyzed.

[0045] Details are g...

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Abstract

The present invention relates to a method for designing a flat-mouth separation airfoil based on a parabolic function. On the basis of the airfoil S818 developed by the American Renewable Energy Laboratory, an optimal design method for a flat-mouth separation airfoil based on a parabolic function is proposed. The maximum lift-drag ratio of the airfoil at the angle of attack is the objective function, and the two parabolic parameters are the design variables. The design variables and related parameters are constrained, and the simulated annealing multi-objective evolutionary algorithm is used to realize the control of the separated airfoil profile of the wind turbine. and parameter optimization. And the large-scale fluid calculation software fluent is coupled to the algorithm program to calculate the aerodynamic performance of the airfoil. Finally, the aerodynamic performance of the optimally designed S818 flat split airfoil and the American Renewable Energy Laboratory airfoil S818 was compared and analyzed. The new airfoil designed by the invention is used to replace the traditional horizontal axis wind turbine blade airfoil, which has good social value and economic benefits.

Description

technical field [0001] The invention relates to a method for designing a flat-mouth separation airfoil based on a parabolic function, and also relates to improving a special airfoil for a high-aerodynamic performance wind machine according to the method. Background technique [0002] At present, the research on the airfoil of wind turbine blades focuses on the aerodynamic performance of the continuous airfoil profile, and few scholars have studied the design method and aerodynamic performance of the separated airfoil. In general, the airfoil of a wind turbine expresses the airfoil profile with a certain mathematical function under a certain design angle of attack, and takes the lift-to-drag ratio as the objective function, and uses an optimization algorithm to design a special airfoil for wind turbines with better aerodynamic performance. The present invention is different from the previous airfoil profile design method, and proposes a design method based on the parabolic fu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/15G06F30/23G06F30/28G06F111/04G06F111/06G06F113/08G06F119/08G06F119/14
CPCG06F30/15G06F30/23G06F30/28G06F2113/08G06F2119/14G06F2119/08G06F2111/04G06F2111/06
Inventor 汪泉王环均杨书益柳柏杨王冯云胡聪
Owner HUBEI UNIV OF TECH