Research On The Effect Of Airfoil-Duct On The Performance Of Horizontal Wind Turbine

In order to improve the aerodynamic performance of the wind turbine,the research on the optimization design of the small horizontal wind turbine has become one of the hotspots of wind turbine research.In this paper,a new type of airfoil-duct structure is proposed,and the influence of the structural parameters of the airfoil on the aerodynamic performance of the horizontal wind turbine is studied.The aim is to provide a new way to improve the aerodynamic performance of the wind turbine.The aerodynamic performance parameters of the wind turbine without the duct are studied by CFD numerical calculation and measurement test.The results show that the results of the two methods are basically the same and the error is within the acceptable range.The reliability of the numerical method is verified,which can provide reference for the numerical calculation method of the airfoil design.The influence of the airfoil parameters selected in the foundation design curve of the airfoil-duct is studied.The results show that the aerodynamic performance of the wind turbine can be improved when the suitable airfoil is used,and different type of the airfoil-duct can be different degrees to enhance the aerodynamic performance of wind turbine.The influence of the diameter ratio of inlet and throat on the performance of the airfoil-duct is studied.The results show that the diameter ratio of inlet and throat of the airfoil-duct can increase the power coefficient of the wind turbine within a certain range.Increasing the diameter ratio of the airfoil-duct is still higher than that of the wind turbine without the airfoil-duct,the maximum increase of 8.3%.Using different angles and using of throat straight segment can be different degrees to improve the power coefficient of the wind turbine.Compared with the ductless wind turbine,on the one hand,the wind turbine of airfoil-duct can increase the axial speed of varying degrees.On the other hand,the wind turbine of airfoil-duct also can improve the differential pressure of blade suction surface and pressure surface,more conducive to wind the efficiency of the impeller is improved.The influence of the one-way fluid-solid coupling analysis of the wind turbine in the with and without the airfoil-duct are studied.The stress and strain of the wind turbine under the condition of the with and without the airfoil-duct are obtained,and then the pre-stressing mode is analyzed.The results show that under the action of fluid-solid coupling,in the same working conditions,the wind turbine blade deformation in the distance from the top of the site of the half of the beginning,the largest part of the top of the leaf.The larger the aerodynamic force corresponds to the stress and strain.In addition,the result obtained by the aerodynamic loading is more suitable with the actual working conditions when the blades of the wind turbine are under the same rotational stress and gravity.