Analisis Kombinasi Wingbow Dan Combined Wedge-Flap Untuk Optimisasi Performa Pada Kapal Semi-Displacement

Azis, Fani Luqman (2026) Analisis Kombinasi Wingbow Dan Combined Wedge-Flap Untuk Optimisasi Performa Pada Kapal Semi-Displacement. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Kapal semi-displacement pada kecepatan tinggi cenderung mengalami peningkatan tahanan akibat perubahan sikap dinamis dan pembentukan gelombang yang signifikan. Penelitian ini bertujuan untuk menganalisis pengaruh kombinasi Wingbow dan Combined Wedge–Flap (CWF) terhadap karakteristik trim dan tahanan total kapal semi-displacement. Metode yang digunakan adalah simulasi Computational Fluid Dynamics (CFD), yang diawali dengan uji grid independence serta validasi model numerik terhadap data referensi untuk memastikan keandalan hasil simulasi. Beberapa konfigurasi Wingbow–CWF dianalisis pada variasi bilangan Froude, dengan fokus pada kecepatan operasional kapal hingga 32 knot (Fn = 0,718). Hasil simulasi menunjukkan bahwa penambahan Wingbow dan CWF mampu memperbaiki sikap dinamis kapal, namun terdapat fenomena trade-off antara stabilitas trim dan peningkatan tahanan akibat bertambahnya luas permukaan basah. Konfigurasi WB+CWF KF menunjukkan stabilitas trim yang baik, tetapi mengalami penalti tahanan pada kecepatan tinggi. Konfigurasi paling optimal diperoleh melalui modifikasi desain KF dengan mereduksi panjang flap menjadi 0,5% Lpp (WB+CWF KF Modifikasi). Konfigurasi ini mampu menurunkan tahanan total melampaui kondisi baseline Wingbow, dengan nilai 85,83 N pada 30 knot dan 93,42 N pada 32 knot. Hasil ini menunjukkan bahwa optimasi geometri CWF berperan penting dalam mencapai keseimbangan antara pengendalian trim dan efisiensi hidrodinamika kapal semi-displacement.
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Semi-displacement vessels operating at high speeds tend to experience increased resistance due to changes in dynamic attitude and significant wave formation. This study aims to investigate the effect of combining a Wingbow and a Combined Wedge–Flap (CWF) on the trim characteristics and total resistance of a semi-displacement vessel. The study employs Computational Fluid Dynamics (CFD) simulations, preceded by a grid independence study and numerical model validation against reference data to ensure the reliability of the simulation results. Several Wingbow–CWF configurations were analyzed over a range of Froude numbers, with particular focus on operational speeds up to 32 knots (Fn = 0.718). The simulation results indicate that the addition of Wingbow and CWF improves the vessel’s dynamic attitude; however, a trade-off phenomenon is observed between trim stability and increased resistance due to the added wetted surface area. The WB+CWF KF configuration demonstrates good trim stability but experiences a resistance penalty at higher speeds. The optimal configuration is achieved through a modification of the KF design by reducing the flap length to 0.5% Lpp (WB+CWF KF Modified). This configuration successfully reduces the total resistance beyond the Wingbow baseline condition, achieving values of 85.83 N at 30 knots and 93.42 N at 32 knots. These results indicate that CWF geometric optimization plays a critical role in achieving a balance between trim control and hydrodynamic efficiency in semi-displacement vessels.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Kapal semi-displacement, Wingbow, Combined Wedge–Flap, tahanan kapal, CFD, Semi-displacement, Wingbow, CWF, Ship resistance
Subjects:	V Naval Science > V Naval Science (General) > V220 Naval ports, bases, reservations, docks, etc.
Divisions:	Faculty of Marine Technology (MARTECH) > Marine Engineering > 36202-(S1) Undergraduate Thesis
Depositing User:	Fani Luqman Azis
Date Deposited:	06 Feb 2026 07:54
Last Modified:	06 Feb 2026 07:54
URI:	http://repository.its.ac.id/id/eprint/132232

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