Analisa Pengaruh Kombinasi Interceptor Dan Stern Flap Pada Kapal Patroli Dengan Metode Cfd

Tobing, Lambok Sion Gebertino Lumban (2025) Analisa Pengaruh Kombinasi Interceptor Dan Stern Flap Pada Kapal Patroli Dengan Metode Cfd. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Performa kapal patroli sangat dipengaruhi oleh hambatan hidrodinamika yang terjadi selama operasi, terutama pada kecepatan tinggi. Untuk mengatasi hal ini, penelitian ini menganalisis efektivitas penggunaan kombinasi perangkat tambahan buritan, yaitu interceptor dan stern flap, untuk mengoptimalkan efisiensi kapal. Interceptor, pelat vertikal di transom, bekerja dengan mengubah distribusi tekanan untuk menghasilkan gaya angkat, sementara stern flap yang merupakan perpanjangan lambung berfungsi memodifikasi aliran untuk mengurangi hambatan. Penelitian ini bertujuan untuk mengetahui pengaruh kombinasi keduanya terhadap pengurangan hambatan dan perubahan trim pada kapal patroli, serta menentukan konfigurasi yang paling optimal. Metodologi yang digunakan adalah Computational Fluid Dynamics (CFD) dengan perangkat lunak NUMECA Fine/Marine. Simulasi dilakukan pada model kapal patroli dengan panjang 10 meter pada kecepatan servis 13 knot (6.68 m/s). Sembilan variasi desain diuji, mengkombinasikan kedalaman interceptor tetap 25 mm dengan tiga variasi panjang stern flap (1.5% LPP, 2% LPP, dan 2.5% LPP) dan tiga variasi sudut (0°, 5°, dan 10°). Hasil analisis menunjukkan bahwa semua variasi kombinasi berhasil mengurangi hambatan kapal dibandingkan dengan kondisi bare hull. Pengurangan hambatan berkisar antara 4,40% hingga 6,48%. Konfigurasi paling optimum adalah penggunaan interceptor 25 mm dengan stern flap sepanjang 2,5% LPP pada sudut 10°, yang menghasilkan reduksi hambatan terbesar sebesar 6,41%. Selain itu, kombinasi ini secara signifikan mengubah karakteristik kapal dari trim by stern (-0.53°) menjadi trim by bow (positif), yang membuktikan keberhasilan perangkat dalam menghasilkan gaya angkat di buritan untuk memperbaiki performa hidrodinamika kapal.
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The performance of patrol vessels is greatly affected by hydrodynamic obstacles that occur during operations, especially at high speeds. To address this, this study analyzed the effectiveness of using a combination of stern attachments, namely interceptors and stern flaps, to optimize ship efficiency. The interceptor, the vertical plate in the transom, works by changing the pressure distribution to produce lift, while the stern flap, which is an extension of the hull, modifies the flow to reduce drag. This study aims to determine the effect of the combination of the two on the reduction of obstacles and trim changes on patrol boats, as well as determine the most optimal configuration. The methodology used is Computational Fluid Dynamics (CFD) with NUMECA Fine/Marine software. The simulation was carried out on a patrol boat model with a length of 10 meters at a service speed of 13 knots (6.68 m/s). Nine design variations were tested, combining a fixed interceptor depth of 25 mm with three variations in stern flap length (1.5% LPP, 2% LPP, and 2.5% LPP) and three angle variations (0°, 5°, and 10°). The results of the analysis showed that all variations of the combination succeeded in reducing the resistance of the vessel compared to bare hull conditions. Barrier reduction ranges from 4.40% to 6.48%. The most optimal configuration is the use of a 25 mm interceptor with a 2.5% LPP long stern flap at an angle of 10°, which results in the greatest drag reduction of 6.41%. In addition, this combination significantly changed the characteristics of the vessel from trim by stern (-0.53°) to trim by bow (positive), which proved the device's success in generating lift in the stern to improve the hydrodynamic performance of the ship.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	CFD, Interceptor, Resistance, Stern Flap, Trim
Subjects:	V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering 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:	Lambok Sion Gebertino Lumban Tobing
Date Deposited:	05 Aug 2025 06:48
Last Modified:	05 Aug 2025 06:48
URI:	http://repository.its.ac.id/id/eprint/127434

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