Research On Aerodynamic Performance Of Horizontal Axis Magnus Wind Turbine Blades

The utilization of wind energy has grown fast in recent years. As the key part ofwind turbine, traditional airfoil blade exists a lot of problem, such as the difficultmanufacturing process, high cost of transport and maintenance. Another type of windturbine with rotating cylinder blade based on Magnus effect can’t get enough Cp as thelift to drag ratio of the cylinder blade is not high enough. This thesis studied a combinedblade based on Magnus effect which can increase the lift to drag ratio of the cylinderblade thus increase the wind energy caught by the turbine.The thesis studied the reason of a drop of drag when the cylinder start to rotate inthe flow field, and the method to further reduce the drag force of rotating cylinder wasdiscussed based on the reason. The effect on the aerodynamic performance whenappended with some suitable structure around the cylinder was analyzed, and thestructure scheme was ascertained. The orthogonal test scheme which study the effect onaerodynamic performance of detailed parameter of the structure was ascertained and thebest parameter group was ascertained. Then the aerodynamic performance change wascalculated when the rotating speed, diameter, wind speed, angle of attack and Reynoldsnumber changes. And the appropriate wind turbine blade structure was found to besuitable for this kind of section. The structure of the combined blade is designed forexperiment, the maximum force acting on the cylinder is calculated to check thestiffness of the shaft and the cylinder. Finally the experiment was done to check theaccuracy of simulation by Fluent software.In conclusion, the thesis analyzed the reason of a drop of drag when the cylinderstart to rotate, and a combined blade was designed based on the reason, and theaerodynamic performance was simulated and experiment analyzed, The result show thatthe new blade can remain the Cp and reduce the cost of design, manufacture, transportand maintenance. So the study of this thesis is of great value in theory and application.