Evaluasi Performa Sistem Propulsi Triple Screw Pada Kapal Ropax Dengan Metode Computational Fluid Dynamics

Ardianto, Bagus (2023) Evaluasi Performa Sistem Propulsi Triple Screw Pada Kapal Ropax Dengan Metode Computational Fluid Dynamics. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Kapal Ropax adalah jenis kapal yang mampu mengangkut penumpang dan kendaraan. Penelitian ini bertujuan untuk menyelidiki pengaruh perubahan sistem propulsi dari single screw menjadi triple screw. Penelitian ini menggunakan simulasi computational fluid dynamics (CFD) untuk melakukan open water test, resistance test, dan self propulsion test. Model yang digunakan dalam pengujian termasuk model propeller tengah (C-Series), model propeller samping (MAU), model single screw, model triple screw saat cruise mode, dan model triple screw saat maneuver mode. Validasi dilakukan melalui grid independence study untuk setiap pengujian dan model. Penelitian ini berfokus pada peningkatan tahanan kapal dan beberapa variabel performa sistem propulsi, yaitu KT, KQ, wake fraction, thrust deduction factor, dan ηrr. Hasil penelitian menunjukkan bahwa kapal dengan triple screw saat cruise mode pada kecepatan service 21 knot mengalami peningkatan tahanan sebesar 8.13%, peningkatan KT sebesar 1.35%, peningkatan wake fraction sebesar 2,79%, dan peningkatan ηrr sebesar 3.12%. Sementara itu, variabel yang mengalami penurunan adalah KQ sebesar -2.30% dan thrust deduction factor sebesar menjadi -0.0377. Pada kecepatan regulasi yaitu 6 knot, triple screw saat maneuver mode mengalami peningkatan tahanan sebesar 56.59%. Terdapat perbedaan pada beberapa variabel performa sistem propulsi yaitu propeller kiri memiliki KT lebih rendah sebesar -8.50% dibandingkan dengan propeller kanan, dan KQ lebih rendah sebesar -24.53%. Selain itu, propeller kiri memiliki wake fraction yang lebih rendah sebesar -11.91% dan ηrr yang lebih tinggi sebesar 22.31% dibandingkan dengan propeller kanan. Pada kecepatan ini, thrust deduction factor memiliki nilai -1.8884.
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The Ropax ship is a type of vessel capable of carrying passengers and vehicles. This research aims to investigate the effect of changing the propulsion system from a single screw to a triple screw. The study employs computational fluid dynamics (CFD) simulations to conduct open water tests, resistance tests, and self-propulsion tests. The models used in the testing include the midship propeller model (C-Series), the side propeller model (MAU), the single screw model, the triple screw model during cruise mode, and the triple screw model during maneuver mode. Validation is performed through grid independence studies for each test and model. The research focuses on the increase in ship resistance and several performance variables of the propulsion system, including KT, KQ, wake fraction, thrust deduction factor, and ηrr. The results indicate that the ship with a triple screw during cruise mode at its service speed of 21 knots an 8.13% increase in resistance, a 1.35% increase in thrust coefficient, a 2.79% increase in wake fraction, and a 3.12% increase in ηrr. Meanwhile, the variables that undergo a decrease are the torque coefficient at -2.30% and the thrust deduction factor at -0.0377. At 6 knots regulated speed, the triple screw in maneuver mode increases by 56.59%. Notably, there are differences in several performance variables of the propulsion system: the port propeller has a lower KT by -8.50% compared to the starboard propeller, and a lower KQ by -24.53%. Moreover, the port propeller has a lower wake fraction by -11.91% and a higher ηrr by 22.31% compared to the right propeller. At this speed, the thrust deduction factor in the triple screw maneuver mode is -1.8884

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Grid Independence, Single Screw, Triple Screw, Cruise, Maneuver
Subjects:	V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM751 Resistance and propulsion of ships
Divisions:	Faculty of Marine Technology (MARTECH) > Marine Engineering > 36202-(S1) Undergraduate Thesis
Depositing User:	Bagus Ardianto
Date Deposited:	25 Aug 2023 07:27
Last Modified:	25 Aug 2023 07:27
URI:	http://repository.its.ac.id/id/eprint/102474

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