Study On Aerodynamic Performance Of Vertical Magnus Wind Turbine

Vertical axis wind turbine,as one of the main forms of wind energy utilization,is highly valued by scholars at home and abroad.Vertical axis wind turbine has a problem of low efficiency because of its low installation position,low wind speed area and small tip speed.To improve the utilization efficiency of vertical axis wind turbine based on Magnus effect,this paper proposes a vertical Magnus wind turbine with combined blades and a vertical Magnus wind turbine with double cylindrical blades.The aerodynamic performance analysis and optimization were conducted by numerical analysis method.The main contents of this paper are as follows:1.Taking Magnus combined airfoil as the research object,the effects of the key parameters,such as velocity ratio,clearance,radius and position on the boundary flow of the airfoil and the lift drag performance at low Reynolds number were studied.The response relationship model between the lift-drag ratio of airfoil and the factors of the velocity ratio,radius,clearance and position was established by a combined approach of using the Latin hypercube test method,numerical analysis and Kriging model.The correlation between the key parameters and lift-drag ratio was calculated.The influences of Magnus airfoil parameters on lift-drag ratio were quantified using the Kriging model and Monte Carlo method.Based on the genetic algorithm,an optimal Magnus combined airfoil was obtained.2.Taking Magnus vertical axis wind turbine with combined blades as the research object,the effects of tip speed ratio,pitch angle and installation position on aerodynamic performance were analyzed.Based on Latin hypercube test method,numerical analysis and Kriging model,the response model of tip speed ratio,pitch angle,installation position and power coefficient of vertical axis wind turbine was established.The Kriging model and Monte Carlo method were used to quantify the effect of main parameters on the moment coefficient of the vertical axis Magnus wind turbine with combined blade.Using genetic algorithm,the parameters of the Vertical Magnus wind turbine with combined blades was optimized.3.Taking Magnus vertical axis wind turbine with double cylindrical blades as the research object,based on the numerical analysis and orthogonal experimental method,the influence of tip speed ratio,circumferential speed ratio and radius on the power coefficient of the Magnus wind turbine with double cylindrical blades was analyzed.To quantify the effect of main parameters on the moment coefficient of a vertical Magnus wind turbine with double cylindrical blades,the Numerical analysis,Latin hypercube test method,Kriging model andMonte Carlo method were used.The optimal combination of global parameters of the Magnus wind turbine with double cylindrical blades was obtained.