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All Journal Indonesian Journal of Maritime Technology or abbreviated (ISMATECH)
Fadhilah , Mahesa Arma
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Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Industrial & Manufacturing Engineering Mechanical Engineering Transportation

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A Hull Form Design Analysis with Variations of Block Coefficient (Cb) and Cross-Sectional Area (CSA) Nugroho, Hendy Pambudi; Syahputri, Viony Fako; Anam , Khoirul; Fadhilah , Mahesa Arma
Indonesian Journal of Maritime Technology Vol. 3 No. 2 (2025): Volume 3 Issue 2, December 2025
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v3i2.8481800

Abstract

This study investigates the influence of hull-form variations on the hydrodynamic performance of a two-passenger leisure boat designed for reservoir operation. Five hull models were developed with deadrise angles of 13°, 15°, 17°, 19°, and 21° to examine how changes in the block coefficient (Cb) and cross-sectional area (CSA) affect total resistance and maneuvering characteristics. Numerical calculations and Computational Fluid Dynamics (CFD) simulations were performed for validation. The 13° deadrise model, which had the highest Cb, exhibited the lowest total resistance of 0.92 kN, while MATLAB-based maneuvering analysis showed the largest turning radius of 9.32 m. Conversely, the 21° deadrise model achieved the smallest turning radius of 5.91 m. At a Froude number (Fn) of 1.37, the boat operates in the planing regime, where a fuller hull enhances hydrodynamic lift and reduces wetted surface area, resulting in lower drag but reduced maneuverability. The results offer practical insights for designing efficient leisure boats optimized for calm-water environments such as reservoirs.
Co-Authors Anam , Khoirul Nugroho, Hendy Pambudi Syahputri, Viony Fako