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Experimental and numerical investigation on the effect of passive jet control system on the performance of a vortex induced vibration energy harvester system
The present study investigates the effect of various geometrical shapes
of a bluff body and its passive jet control system on the performance of a vibration energy
harvester system. The shape of a bluff body is responsible for the vortex shredding and
the effect of passive jet control system would impact the dynamic behavior of vortices and
resulting in enhancing or suppressing the performance of a bluff body oscillation. In this
regard, initially a two-dimensional numerical investigation has been carried out to
understand and optimize the dynamic response from the bluff body and its effect on the
beam. The validation of numerical code has been carried out for a cylindrical shaped bluff
body using ANSYS Fluent numerical modelling software and the numerically predicted
results have been compared with literature and the same has been experimentally
developed and tested in a wind tunnel. Upon validation, numerical simulations have been
carried out on optimizing the geometrical shapes and passive jet control system of a bluff
body. The lift, drag and displacement characteristics was observed and plotted for various
flow conditions ranging between 2 m/s and 8 m/s with intervals of 0.5 m/s. The contours
of vorticity, pressure and displacement have been presented and discussed. The optimized
model has been developed and tested in a wind tunnel for various flow conditions and the
results were presented and discussed.
