Rochman, Muchammad Nurur (2014) Studi Pengaruh Penambahan Flange Untuk Peningkatan Performansi Diffuser-Augmented Wind Turbine (DAWT) Dengan Curvature Lengkung. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Diffuser Augmented Wind Turbine (DAWT) memberikan potensi untuk
mengatasi ketersediaan energi angin seperti di Indonesia dengan kecepatan rata-rata
tahunan dari 3-5 m/s. Dalam tesis ini, studi komputasi CFD untuk mengetahui
pengaruh penambahan flange (pada posisi trailing edge dari model diffuser yang
sebelumnya dengan desain kurvatur lengkung) terhadap perubahan kecepatan angin
dalam diffuser. Dua model bentuk flange telah disimulasikan, yaitu flange
berbentuk datar (flat-flange) dan flange berbentuk airfoil. Pengamatan perubahan
sudut pada pemasangan flange, juga memiliki pengaruh terhadap kecepatan angin
maksimum di dalam diffuser. Hasil penelitian menunjukkan bahwa penambahan
flange pada posisi trailing-edge diffuser akan dapat lebih meningkatkan kecepatan
udara di dalam diffuser. Penambahan flange berbentuk datar akan meningkatkan
kecepatan udara hingga 65% lebih tinggi dari kecepatan udara freestream.
Sementara itu, dengan mengoptimalkan posisi sudut flange, akan meningkatkan
kecepatan angin hingga 4% (yaitu meningkat 69% dan maksimum di φ = 60o).
Bahkan peningkatan kecepatan angin lebih tinggi (dibanding penambahan dari
flange berbentuk datar) didapatkan dengan penambahan flange berbasis airfoil,
yaitu meningkat hingga 72% (maksimum pada posisi sudut φ = 72o).
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The Diffuser Augmented Wind Turbine (DAWT) offers potentials to cope
with the wind availability situation like in Indonesia, i.e. with yearly average of 3-
5 m/s. In this research, computational CFD studies to get insight into the role of
flange installment (at the trailing edge of the previously proposed model diffuser
Augmented Wind Turbine with curve interior wall) to the wind velocity
intensification inside the diffuser. Two models of flange are investigated, i.e. the
flat flange and airfoil-shape flange. The role of angle-of-installment that provide
the maximum velocity inside the diffuser are also investigated. Results show that
the additional flange to the trailing-edge of the diffuser will more step-up the air
velocity inside the diffuser. The installment of flat flange will additionally increase
the air velocity up to 65 % higher from freestream air velocity. Meanwhile by
optimizing the position of flange's angle, a more step-up in velocity up to 4% can
still being harvested (i.e. increased 69% and max at ϕ = 60o). An even more higher
additional velocity (in compare to the installment of flat flange) can be harvested
by installment of flange with airfoil-shape, i.e. up to 31% (max at ϕ = 72o).
| Item Type: | Thesis (Masters) |
|---|---|
| Additional Information: | RTF 621.406 Roc s |
| Uncontrolled Keywords: | DAWT, Optimasi Curvature Wall, penambahan flange, sudut flange. |
| Subjects: | T Technology > T Technology (General) |
| Divisions: | Faculty of Industrial Technology > Physics Engineering > 30101-(S2) Master Thesis |
| Depositing User: | Users 13 not found. |
| Date Deposited: | 23 Aug 2017 02:17 |
| Last Modified: | 23 Aug 2017 02:17 |
| URI: | http://repository.its.ac.id/id/eprint/48726 |
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