Analisis CFD Performa Wingbow Pada Kapal Cepat Semi-Displacement

Imani, Bagus Fadhila Nur (2024) Analisis CFD Performa Wingbow Pada Kapal Cepat Semi-Displacement. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Hambatan kapal merupakan faktor penting dalam perencanaan pembuatan kapal,
terutama dalam pemilihan mesin penggerak utama. Hambatan yang lebih rendah
memungkinkan penggunaan mesin penggerak yang lebih kecil dan lebih murah. Kapal cepat,
dengan kecepatannya yang tinggi, menghadapi hambatan yang signifikan, yang dihitung
dengan formula RT = 0.5 x ρ x V² x S x CT. Dalam dua tahun terakhir, permintaan untuk
kapal cepat di Indonesia meningkat, terutama untuk keperluan pengawasan dan patroli,
terlihat dari peningkatan permintaan pengujian di Laboratorium Hidrodinamika. Kapal
menciptakan gelombang haluan yang bervariasi dengan bentuk lambung dan kecepatan,
yang mempengaruhi hambatan.Untuk mengurangi hambatan ini, penambahan appendages
seperti wingbow dapat efektif. Penelitian menunjukkan bahwa appendages ini dapat
mengurangi hambatan. Studi ini menerapkan wingbow pada kapal cepat semi-displacement,
menggunakan simulasi Computational Fluid Dynamics (CFD) untuk menyelidiki
dampaknya. Hasil menunjukkan bahwa dengan sudut attack 2 derajat dan rasio ketebalan
0,78T, hambatan total berkurang sebesar 4,13% pada kecepatan 30 knot. Pengurangan juga
terlihat pada kecepatan lain: 4,17% pada 32 knot dan 4,38% pada 28 knot, dengan
peningkatan trim sebesar 0,89% pada 30 knot. Elevasi gelombang berkurang sebesar 11,11%
pada 30 knot dan 7,27% pada 24 knot.
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Ship resistance is a crucial factor in shipbuilding, especially in selecting the main
engine. Lower resistance allows for the use of smaller, less expensive engines. Fast vessels,
with their high speeds, face significant resistance, calculated using the formula RT = 0.5 x ρ
x V² x S x CT. Over the past two years, the demand for fast vessels in Indonesia has
increased, particularly for surveillance and patrol purposes, as evidenced by the increased
testing requests at the Hydrodynamics Laboratory. Ships create bow waves that vary with
hull shape and speed, which influence resistance. To reduce this resistance, adding
appendages such as wingbows can be effective. Research indicates that these appendages
can reduce resistance. This study applies wingbows to semi-displacement fast vessels, using
Computational Fluid Dynamics (CFD) simulations to investigate their impact. Results show
that with a 2-degree attack angle and a thickness ratio of 0.78T, total resistance decreases by
4.13% at a speed of 30 knots. Reductions are also observed at other speeds: 4.17% at 32
knots and 4.38% at 28 knots, with a trim increase of 0.89% at 30 knots. Wave elevation is
reduced by 11.11% at 30 knots and 7.27% at 24 knots.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Resistance, Appendages, Wingbow, CFD.
Subjects:	V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM161 Ships--Hydrodynamics V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM163 Hulls (Naval architecture) 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 Fadhilah Nur Imani
Date Deposited:	06 Aug 2024 19:14
Last Modified:	06 Aug 2024 19:14
URI:	http://repository.its.ac.id/id/eprint/113594

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