Pengaruh Desain Interior Diffuser Terhadap Peningkatan Performa Diffuser Augmented Wind Turbine (DAWT)

Yiyin Klistafani, Muh Iqbal Mukhsen, Muh Iqbal Mukhsen

Abstract


The main objective of numerical simulation in this
studies is to determine the effect of diffuser’s interior design on
increasing the diffuser augmented wind turbine (DAWT)
performance by observing wind velocity increment. Numerical
studies were carried out using the computational Fluid Dynamics
(CFD) method through a two-dimensional steady approach with
Ansys Fluent 18.2 and Ansys Workbench 18.2 software. The
present studies spesifically investigate the shapes of diffuser,
namely flat diffuser and curved diffuser. The studies demonstrate
that the curved diffuser generates stronger increment of the wind
velocity than flat diffuser (at centreline), which 1.842 times the
freestream velocity, while the flat diffuser is only able to increse
up to 1.742 times the freestream velocity. The curved diffuser
shows the highest increment of the average wind velocity along
diffuser with the greatest increment of 78.66 % and the flat
diffuser is only able to provide average wind velocity increment
up to 44.81%. The curved interor of diffuser is able to enlarge the
wake area, so the effect of the suction flow entering the diffuser
becomes stronger. Therefore, curved diffuser is better to provide
DAWT performance improvements.


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DOI: http://dx.doi.org/10.31963/intek.v5i2.573

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