Publisher

UMBUMB

Journal SINERGISINERGI Abstract

Modifying the hull shape is one of the challenges in designing a ship. The angle of the ships entrance is a significant determinant of the total resistance of the ship. This research aimed to analyze the total resistance of the ship due to changes in the shape of the ships bow. This research used the Computational Fluid Dynamics (CFD) method with overset mesh technique to predict the ships total resistance and trim angle. Parameters used in the five-speed numerical simulations. This research indicated that a change in the bow angle of the ship results in a 5% change in the ships resistance for every change in the bow entrance angle. Therefore, the prediction of total resistance shows significant results in planning conditions. Compared to another bow entrance angle at low Fr, total resistance has no noticeable differences. Angle changes of the entrance of the ships bow also significantly affected the trim conditions on the ship according to the speed. At Fr 1.03, the stern trim angle tended to decrease dramatically. As a result, the trim by stern under porpoising probably oscillates considerably.

Conclusion

The research concluded that changes in the hull entrance angle significantly affect the total ship resistance, with a 5% change in resistance for each degree of change in the bow entrance angle.The analysis revealed that at lower Froude numbers (Fr < 0.67), a smaller bow angle reduces ship resistance, while at higher Froude numbers (Fr > 1), a larger bow angle is more effective.Ultimately, engineering the ships bow angle can improve the ships trim condition at specific speeds, impacting overall resistance.

Future Research

Further research should investigate the impact of combining different bow entrance angles with various hull forms to optimize resistance reduction across a wider range of speeds and sea states. Additionally, exploring the use of advanced CFD techniques, such as Large Eddy Simulation (LES), could provide more detailed insights into the complex flow phenomena around the hull, particularly at high speeds where turbulence plays a significant role. Finally, a study focusing on the integration of active trim control systems, informed by the CFD simulations, could lead to the development of more efficient and stable high-speed planing vessels, potentially reducing energy consumption and improving operational performance. These investigations, building upon the current findings, will contribute to a more comprehensive understanding of planing hull hydrodynamics and facilitate the design of next-generation high-speed ships.

References

1. Journal of Marine Science and Technology = 海洋學刊｜Airiti Library 華藝線上圖書館. journal... doi.org/10.6119/JMSTJournal of Marine Science and Technology AUOOuAiriti Library ayoOunu journal doi 10 6119 JMST
2. Verifikasi Deep-V Planing Hull Menggunakan Finite Volume Method Pada Kondisi Air Tenang | Samuel | TEKNIK.... doi.org/10.14710/teknik.v0i0.29391Verifikasi Deep V Planing Hull Menggunakan Finite Volume Method Pada Kondisi Air Tenang Samuel TEKNIK doi 10 14710 teknik v0i0 29391
3. DESIGN MODELING OF SAVONIUS-DARRIEUS TURBINE FOR SEA CURRENT ELECTRIC POWER PLANT | Metheny | SINERGI.... publikasi.mercubuana.ac.id/index.php/sinergi/article/view/8137DESIGN MODELING OF SAVONIUS DARRIEUS TURBINE FOR SEA CURRENT ELECTRIC POWER PLANT Metheny SINERGI publikasi mercubuana ac index php sinergi article view 8137

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