Design And Synergistic Clustering Simulation Optimization Of Vertical Axis Wind Turbine System

Wind energy,as a clean and renewable energy,is inexhaustible.Efficient development and utilization of wind energy is a great significance to reduce global carbon emissions,mitigate greenhouse effect and solve the problem of energy shortage.Vertical axis wind turbine has the advantages of simple structure,strong adaptability to wind direction and low environmental impact.It mainly relies on the lift force generated by the fluid velocity difference and pressure difference before and after the blade to drive the impeller to rotate.This paper mainly analyzes the aerodynamic effect of H-type vertical axis wind turbine,and designs a group of three-axis vertical axis wind turbine system,which includes energy extraction unit,power transmission mechanism and energy storage and power generation unit.The aerodynamic performance of a three-axis vertical axis wind turbine is calculated and optimized by numerical simulation method,。The influence of multiple factors on the system performance is analyzed and the optimal parameter configuration of the system is obtained.In this paper,the computational fluid dynamics(CFD)method is used to simplify the model,simulate and optimize the response surface of a three-axis vertical axis wind turbine under certain working conditions.The influence of the wind wheel solidity,the number of blades N,the distance S/D between two wind turbines in upstream of the system,and the distance B/D between two wind turbines in upstream and downstream on the torque coefficient of each wind turbine in the wind turbine system was analyzed by orthogonal test method and optimized by response surface method.Compared with the isolated vertical axis wind turbine,the wind wheel torque coefficient of the three-axis vertical axis wind turbine increases by 0.01～0.07 when the solidity 0.2～0.4 under the condition of tip speed ratio λ=2.4.When σ=0.4,N=2,S/D=0.5,B/D=3.4,the torque coefficient of the system reaches the maximum.Under the condition of tip speed ratioλ=1.5,λ=1.8 and λ=2.1,the three axis vertical axis wind turbine system was numerically simulated.The influence of compactness,S/D and B/D on the system torque coefficient was analyzed under different working conditions and optimized by response surface method.The optimal parameter configuration of the system under different working conditions was obtained.When the blade tip ratio λ=1.5,N=2,S/D=0.5,B/D=2,the system torque coefficient reaches the maximum.When the blade tip ratio λ=1.8,N=2,S/D=0.5,B/D=4,the system torque coefficient Cm reaches the maximum.When the blade tip ratio λ=2.1,σ=0.2,N=2,S/D=1.5,B/D=2,the system torque coefficient C_m reaches the maximum.