Wind energy is one of the most clean and renewable energy sources available in nature. The existing wind energy needs few modifications to meet required energy demand. Diffuser augmented wind turbine can be a potential solution to run a turbine at its rated power. Although research has been lasted for past five decades, still there is a scope to modify the diffuser geometry to maximize the wind velocity at blades with minimum diffuser dimensions. Since larger diffuser dimensions are not practical for efficient use of space. In the current study, four different brim configurations are considered and CFD analysis is done by varying the brim angle for each design and also by keeping all other diffuser geometry unchanged. Brims used are straight, bent, stepped brims and at the last, fins are placed over the brim in order to create the low-pressure region behind it, which in turn increases the wind velocity at the throat section of the diffuser. The results from the analysis have shown the appreciable increase in the wind velocity at different brim angle. Ansys Design modeler is used for 3D modelling of diffuser geometry and 2D meshing is used. CFD analysis is done using Ansys Fluent software.

Keywords : DAWT, Brim, CFD, Wind Energy, Ansys Fluent.