numerical investigation of the best wind turbine shroud flange curvature for maximum wind power extraction

In today’s world, net zero energy buildings are growing and developing. these buildings generally supply their energy needs from renewable sources such as wind. unfortunately, in urban areas, the quality of the passing wind is low and it is not able to create the necessary force for the proper rotation of turbines. to overcome this problem, it is necessary to use a tool that can speed up the flow like a shroud. in the present work, a vertical straight flange is considered at the end of the shroud. the points in the middle of the flange height move to the end of the shroud with a very small interval and create different curves. by using this procedure, a flange with an optimal curve that is able to create the highest mean velocity of air passing through the shroud will be obtained. the results show a significant increase in mean velocity, which has been confirmed by studies of turbulent kinetic energy behind the turbine shroud. based on the results of a three-dimensional simulation, it is concluded that in the turbine section, a mean velocity increase of 20% can be achieved, which is the first time that using an aerodynamic cross-section for the flange of the shroud and optimizing it has achieved such a great increase in air mean velocity along wind turbine shroud.