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.