Tugas Akhir Mesin
SIMULASI PENGARUH MODEL BASIN TERHADAP KECEPATAN DAN TINGGI ALIRAN PADA TURBIN VORTEX GRAVITASI DENGAN SOFTWARE AUTODESK COMPUTATIONAL FLUID DYNAMICS (CFD)
The gravity vortex turbine is a type of microhydro power plant (PLTMH) that uses a vortex to turn the
turbine. To increase its efficiency, the flow velocity and
vortex height must be increased. So that it is necessary
to pay attention to the variables that influence it, such as
the inflow of water and the size of the basin. However,
until now investigating the comparison of the two basin
structures between the cylindrical and conical models is
still few (Dhakal, 2015).
The purpose of this study was to determine the
effect of the basin model, inlet notch width, and draft
tube length on the flow velocity and vortex height. This
study uses a simulation method with software Autodesk
Computational Fluid Dynamics (CFD) 2019. This study
varied the types of conical and cylindrical basin models
with variations in the inlet notch widths of 80 mm, 100
mm, 120 mm, 140 mm, and 160 mm and variations in
the length of the draft tube were 0 mm, 50 mm, 100 mm,
150 mm, and 200 mm.
The results of this study indicate that the
strongest flow velocity with a strong vortex shape is
obtained in the conical basin model with 160 mm notch
inlet width at 0 mm draft tube length is 1.49 m / s. Also,
the highest vortex height is obtained in the conical basin
model with a notch inlet width of 80 mm at a draft tube
length of 0 mm which is 0.54 m and has a strong vortex
shape.
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