Analysis Of Aerodynamic Performance And Research Of Optimization Of Wave Leading Edge Wind Turbine Blade With Tiny Cylinder

The blade is the core components of the wind turbine,and the aerodynamic shape of blade can affect the aerodynamic performance of the blade,thus affecting the power generation efficiency of the wind turbine.In recent years,with the continuous optimization of blade aerodynamic shape,wave leading edge blade with good aerodynamic performance are gradually used.However,due to the disturbance,the wave bottom position of wave leading edge blade is the first to take place flow separation,which makes the aerodynamic performance of the wave leading edge blade less improved.At the same time,the traditional wave leading edge blade also have some problems,such as poor structural stability and poor rigidity of blades.Therefore,a new type of wavy leading edge blade with tiny cylinder is proposed in this paper,which is to install a tiny cylinder between two adjacent wave top of the traditional wavy leading edge blade.Firstly,in this paper,the three-dimensional modeling of traditional wave leading edge blade and tiny-cylindrical wave leading edge blade is carried out by using Solid Works software,including blade coordinate transformation,wave leading edge parameter selection and tiny cylinder parameter selection.Then the FLUENT software in CFD is used to simulate the traditional wave leading edge blade and the tiny-cylindrical wave leading edge blade,selection k-epsilon turbulence model and large vortex simulation turbulence model and the aerodynamic performance and the external flow field characteristics of the two blades are compared and analyzed at different angles of attack.Secondly,the static module of ANSYS is used to analyze the blade surface stress,and the blade stability under the condition of tremor.Finally,the LSSVM algorithm is used to establish the aerodynamic performance data calculation model of the blade,and then the PSO algorithm is used to optimize the parameters of the diameter and layout position of tiny cylinder to determine the optimal value.The results show that the existence of tiny-cylinders can increase the lift of blade and reduce the resistance of blade,thereby improving the lift-drag ratio,aerodynamic performance and aerodynamic efficiency of blade;and can delay the flow separation at the wavy bottom position of blade,reduce the stall area and improve the stall situation of blade;at the same time,it can enhance the anti-vibration ability of blade,reduce the stress on the blade root,which makes blade not easy to break and reduce the cost of maintenance and repair in the later period,so as to reduce the cost of wind power and increase the competitiveness of wind power market.