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Brodogradnja : An International Journal of Naval Architecture and Ocean Engineering for Research and Development, Vol. 73 No. 2, 2022.

Original scientific paper

https://doi.org/10.21278/brod73206

WAKE WASH OF A FAST SMALL BOAT IN RESTRICTED WATERS: MODEL TESTS AND FULL-SCALE MEASUREMENTS

Mohd Arif Ismail ; School of Mechanical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor Malaysia
Nik Mohd Ridzuan Shaharuddin orcid id orcid.org/0000-0001-5007-8787 ; School of Mechanical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor Malaysia; b. Marine Technology Center (MTC), Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor Malaysia
Omar Yaakob ; Marine Technology Center (MTC), Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor Malaysia
Mohamad Hidayat Jamal ; School of Civil Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor Malaysia
Faizul Amri Adnan ; Marine Technology Center (MTC), Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor Malaysia
Ahmad Hadi Mohamed Rashidi ; Centre for Coastal and Oceanography Studies, National Hydraulic Research Institute of Malaysia
Wan Ahmad Hafiz Wan Mohd Azhary ; Centre for Coastal and Oceanography Studies, National Hydraulic Research Institute of Malaysia
Mohd Kamarul Huda Samion ; Hydraulic & Instrumentation Laboratory, National Hydraulic Research Institute of Malaysia
Andiknurdiyana Bachok ; School of Mechanical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor Malaysia
Badruzzaman Ahmad ; School of Mechanical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor Malaysia
Nur Shafira Ahmad ; School of Mechanical Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor Malaysia

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Abstract

This paper presents the model testing of an 8.23m boat with hard chine planning hull generated waves at the Kilim recreational park. Wake is considered one of the main causes of riverbank erosion due to the energy carried by waves hitting the riverbank. Initially, ship particulars were measured from actual boats to generate a hull form using MAXSURF software. A lines plan was then generated to fabricate the model using fibreglass. Experiments were conducted in the National Hydraulic Research Institute of Malaysia (NAHRIM) at various speeds at a constant operating draft. The wave patterns generated by the modelled boats at different speeds were recorded for analysis. Wave attenuation for deep water conditions was studied and it was found that the wave exponent, n ranged from -0.36 to -0.75 for all depth Froude number (Fnh) condition. Wave decay analysis was used to estimate wave height for defined water depth. For 11 people with an average mass of 65 kg on board, the produced wave height was greater than the permissible wave wake height of 75 mm. The generated energy exceeded 60 Joules/m for nearly all measured speeds. A boat speed of less than 5 knots was suggested for boats loaded with the maximum passenger limit of 11 people. Other recommendations were made to minimize the wave wake height produced by the modelled boat.

Keywords

Boat generated waves; Boat Wake Analysis; Wave attenuation; Wave energy

Hrčak ID:

278857

URI

https://hrcak.srce.hr/278857

Publication date:

1.4.2022.

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