Field Measurement of Fishing Boats Generated Waves

Suprayogi, Dedy Triawan; Yaakob, Omar; Adnan, Faizul Amri; Ghani, Mohamad Pauzi Abdul; Sheikh, Usman Ullah Sheikh Izzat Ullah

doi:10.11113/jt.v66.2516

Cited by 4 publications

(1 citation statement)

References 11 publications

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“…The wave profiles were captured through visual observation techniques using both 35mm and video cameras. With the development in photo-analysis technology, this method was employed by [13] to study the generated waves by conventional and high speed ferries, and more recently by [14] to obtain divergent wave angles of a fishing vessel using field measurements in a river. During the experiments, the ship was subject to tidal rise and fall, currents and wind.…”

Section: Previous Studiesmentioning

confidence: 99%

Experimental Study of the Impact of Drift, Depth, and Lateral Restrictions on Inland Ship-Induced Waves under Small and Moderate Ship Speeds

2021

CERJ

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The study of ship-induced waves is essential to prevent bank erosion and optimize the ship's maneuverability. Inland ship-induced waves are in general affected by many factors divided into ship related parameters (form, draft, speed, drift, and navigation environment parameters (depth, distance to banks, and offset of the sailing line from the channel middle). Based on a set of towing tank experiments, this article depicts the effects of a number of these parameters on inland ship generated waves. To account for real navigation conditions, the ship speed is chosen so as to comply with the regular range of inland navigation speed which is close enough from the maximum allowable speed supported by the experimental setup. To study the effect of ship form, the experiment was carried out on a containership, a pusher-barge and a pusher-two barges. The study is achieved for two different ship's draft (T =0.1 m and T=0.04 m) and repeated for different configurations of water depth (h between 0.24 m and 0.12 m). The lateral confinement is studied by varying the channel width (W=2.88 m, 1.44 m and 0.72 m). Special attention is paid to the study of a restricted waterway combining both depth and lateral confinement. Besides, to identify the influence of drift, three drift angles were imposed (between 0 and 5°). Finally, the influence of the eccentricity is identified through varying the offset distance (offset = 0.44 m and 0.55 m). The ship wave maximum amplitude is validated by comparison to literature.

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Section: Previous Studiesmentioning

confidence: 99%

Experimental Study of the Impact of Drift, Depth, and Lateral Restrictions on Inland Ship-Induced Waves under Small and Moderate Ship Speeds

2021

CERJ

View full text Add to dashboard Cite

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Speed limit determination of fishing boats in confined water based on ship generated waves

Suprayogi

Yaakob

Ahmed

et al. 2022

Alexandria Engineering Journal

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Streamlined vessels for speedboats: Macro modifications of shark skin design applications

Ibrahim

Zulkharnain

et al. 2018

AIP Conference Proceedings

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Functional properties of shark denticles have caught the attention of engineers and scientist today due to the hydrodynamic effects of its skin surface roughness. The skin of a fast swimming shark reveals riblet structures that help to reduce skin friction drag, shear stresses, making its movement to be more efficient and faster. Inspired by the structure of the shark skin denticles, our team has conducted a study on alternative on improving the hydrodynamic design of marine vessels by applying the simplified version of shark skin skin denticles on the surface hull of the vessels. Models used for this study are constructed and computational fluid dynamic (CFD) simulations are then carried out to predict the effectiveness of the hydrodynamic effects of the biomimetic shark skins on those models. Interestingly, the numerical calculated results obtained shows that the presence of biomimetic shark skin implemented on the vessels give improvements in the maximum speed as well as reducing the drag force experience by the vessels. The pattern of the wave generated post cruising area behind the vessels can also be observed to reduce the wakes and eddies. Theoretically, reduction of drag force provides a more efficient vessel with a better cruising speed. To further improve on this study, the authors are now actively arranging an experimental procedure in order to verify the numerical results obtained by CFD. The experimental test will be carried out using an 8 metre flow channel provided by University Malaysia Sarawak, Malaysia.

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Field Measurement of Fishing Boats Generated Waves

Cited by 4 publications

References 11 publications

Experimental Study of the Impact of Drift, Depth, and Lateral Restrictions on Inland Ship-Induced Waves under Small and Moderate Ship Speeds

Experimental Study of the Impact of Drift, Depth, and Lateral Restrictions on Inland Ship-Induced Waves under Small and Moderate Ship Speeds

Speed limit determination of fishing boats in confined water based on ship generated waves

Streamlined vessels for speedboats: Macro modifications of shark skin design applications

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