Rosyada, Amron (2025) Kajian Pengaruh Arah Aliran Dari Lower Plate Dan Panjang Upper Plate Pada Impinging Jet Casing Turbin Air Savonius. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Turbin Savonius adalah salah satu dari berbagai perangkat yang digunakan untuk mengubah energi aliran fluida menjadi listrik. Karena efisiensinya yang rendah, banyak penelitian telah dilakukan untuk meningkatkan kinerjanya. Dalam makalah ini, efek dari arah aliran jet yang menghantam sisi cekung returning blade telah diamati. Ada 4 desain casing; base casing design (BCD) dari penelitian sebelumnya dan 3 desain yang diusulkan yang memiliki arah aliran jet yang menghantam tegak lurus dengan sisi cekung returning blade saat posisi azimuth turbin masing-masing 60° (D-I), 75° (D-II), dan 90° (D-III). Penelitian ini menggunakan metode transien CFD (Computational Fluid Dynamic) dua dimensi menggunakan Ansys Fluent dengan Kω-SST (Shear-Stress Transport) sebagai model turbulensi. Hasil simulasi menunjukkan bahwa semua desain casing mampu menaikkan koefisien daya (Cp) dari desain turbin konvensional yang hanya memiliki Cp maksimum sebesar 23%. Desain D-III memiliki nilai Cp maksimum tertinggi yaitu 74% sedangkan desain BCD hanya mampu menghasilkan Cp sebesar 50%. Ketiga desain usulan mampu menghasilkan jet stream lebih tinggi dari pada desain BCD. Disisi lain, panjang upper plate berpengaruh terhadap peforma turbin. Panjang upper plate senilai 4R (R=radius turbin) merupakan panjang optimum.
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Savonius turbine is one of the various devices used to convert fluid flow energy into electricity. Due to its low efficiency, many studies have been conducted to increase its performance. In this paper, the effect of impinging jet stream direction to concave side of returning blade has been observed. There are 4 casing designs; base casing design (BCD) from previous work and 3 proposed designs which have impinging jet stream direction perpendicularly with the concave side of returning blade azimuth position of 60° (D-I), 75° (D-II), and 90° (D-III) respectively. The study employed two-dimensional CFD (Computational Fluid Dynamic) transient method using Ansys Fluent with Kω-SST (Shear-Stress Transport) as the turbulence model. The result shows that all casing designs are able to rise up the coefficient of power (Cp) of conventional turbine design which only has 23% of Cp. Furthermore, D-III offers the highest maximum Cp of 74% while BCD only produce 50% of maximum Cp. The three proposed casing designs could generate higher jet stream velocity than BCD. Another finding shows that upper plate length gives impact on turbine performance where upper plate length of 4R (R = turbine radius) is the optimum option.
Item Type: | Thesis (Masters) |
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Uncontrolled Keywords: | Turbin air savonius, impinging jet, coefficient of power, upper plate, savonius turbine |
Subjects: | Q Science > QC Physics > QC151 Fluid dynamics |
Divisions: | Faculty of Marine Technology (MARTECH) > Marine Engineering > 36101-(S2) Master Theses |
Depositing User: | Amron Rosyada |
Date Deposited: | 06 Aug 2025 09:16 |
Last Modified: | 06 Aug 2025 09:16 |
URI: | http://repository.its.ac.id/id/eprint/127848 |
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