Effect of hull separation ratio and various ship draft to a low-speed catamaran in shallow water

Putrajaya is Malaysia's federal administrative capital and a well-planned city. With a display of colored boats floating across the lake at Marina Putrajaya, Putrajaya Lake is turned into a beautiful sight for everyone to enjoy it. It has a high potential to be a part of the growth and developm...

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Main Author:	Siek, Hock Chai
Format:	Thesis
Language:	English
Published:	2022
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://eprints.utm.my/id/eprint/101449/1/SiekHockChaiMSKM2022.pdf
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id	my-utm-ep.101449
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spelling	my-utm-ep.1014492023-06-21T09:35:36Z Effect of hull separation ratio and various ship draft to a low-speed catamaran in shallow water 2022 Siek, Hock Chai TJ Mechanical engineering and machinery Putrajaya is Malaysia's federal administrative capital and a well-planned city. With a display of colored boats floating across the lake at Marina Putrajaya, Putrajaya Lake is turned into a beautiful sight for everyone to enjoy it. It has a high potential to be a part of the growth and development of Malaysia‘s tourism industry. In addition, the Management of Putrajaya Lake plans to cater to recreation, fishing, water sports and water transport. Currently, there are a few catamaran cruise boats that are used for sightseeing propose. Therefore, the number of cruise boats is planned to increase in the future due to accommodating a large number of tourists. The existing design of catamarans shall be improved and fulfill the limitations of Putrajaya Lake especially the low operational speed catamarans and shallow water conditions. However, limited researches has been found for low-speed catamaran studies in shallow water conditions. In order to fulfil the research gap, the current study is focused on studying the effect of hull separation ratio, H/L of the catamaran and various ship drafts, T on the low-speed catamaran in shallow water and improving the catamaran design with better operational performance in terms of better resistance and lower operating cost. This research aims to provide a more competitive hull separation ratio, H/L for catamaran boats to operate in this low-speed condition. Then, a parametric study was conducted to identify the effect of hull separation ratio and different catamaran drafts on the low operational speed in shallow water using Computational Fluid Dynamics (CFD) software, which is Flow3D. Grid independence study and method validation were carried out in methodology. Three types of catamaran drafts were calculated with water depth to ship draft ratio, h/T for 2.5, 2.32, and 2.18 to analyse the total coefficient and free surface elevation effect. The objectives of this research were successfully achieved and the collected data is able to contribute to future development either for Putrajaya Lake Management or low-speed operation catamaran. The results showed that the smaller hull separation ratio, H/L is more suitable since lower total coefficient of resistance and free surface elevation occurred during the Froude number, Fr = 0.4 condition. Also, it recommended to use of a higher water depth to ship draft ratio, h/T due to the smaller ship draft, T showed smaller total coefficient of resistance and free surface elevation. In conclusion, this research is able to contribute valuable data for Putrajaya Lake management in improving its catamaran design in the future, as public transport operators always face challenges in producing a more environmentally friendly catamaran with commercial speed. 2022 Thesis http://eprints.utm.my/id/eprint/101449/ http://eprints.utm.my/id/eprint/101449/1/SiekHockChaiMSKM2022.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:151645 masters Universiti Teknologi Malaysia, Faculty of Engineering - School of Mechanical Engineering Faculty of Engineering - School of Mechanical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Siek, Hock Chai Effect of hull separation ratio and various ship draft to a low-speed catamaran in shallow water
description	Putrajaya is Malaysia's federal administrative capital and a well-planned city. With a display of colored boats floating across the lake at Marina Putrajaya, Putrajaya Lake is turned into a beautiful sight for everyone to enjoy it. It has a high potential to be a part of the growth and development of Malaysia‘s tourism industry. In addition, the Management of Putrajaya Lake plans to cater to recreation, fishing, water sports and water transport. Currently, there are a few catamaran cruise boats that are used for sightseeing propose. Therefore, the number of cruise boats is planned to increase in the future due to accommodating a large number of tourists. The existing design of catamarans shall be improved and fulfill the limitations of Putrajaya Lake especially the low operational speed catamarans and shallow water conditions. However, limited researches has been found for low-speed catamaran studies in shallow water conditions. In order to fulfil the research gap, the current study is focused on studying the effect of hull separation ratio, H/L of the catamaran and various ship drafts, T on the low-speed catamaran in shallow water and improving the catamaran design with better operational performance in terms of better resistance and lower operating cost. This research aims to provide a more competitive hull separation ratio, H/L for catamaran boats to operate in this low-speed condition. Then, a parametric study was conducted to identify the effect of hull separation ratio and different catamaran drafts on the low operational speed in shallow water using Computational Fluid Dynamics (CFD) software, which is Flow3D. Grid independence study and method validation were carried out in methodology. Three types of catamaran drafts were calculated with water depth to ship draft ratio, h/T for 2.5, 2.32, and 2.18 to analyse the total coefficient and free surface elevation effect. The objectives of this research were successfully achieved and the collected data is able to contribute to future development either for Putrajaya Lake Management or low-speed operation catamaran. The results showed that the smaller hull separation ratio, H/L is more suitable since lower total coefficient of resistance and free surface elevation occurred during the Froude number, Fr = 0.4 condition. Also, it recommended to use of a higher water depth to ship draft ratio, h/T due to the smaller ship draft, T showed smaller total coefficient of resistance and free surface elevation. In conclusion, this research is able to contribute valuable data for Putrajaya Lake management in improving its catamaran design in the future, as public transport operators always face challenges in producing a more environmentally friendly catamaran with commercial speed.
format	Thesis
qualification_level	Master's degree
author	Siek, Hock Chai
author_facet	Siek, Hock Chai
author_sort	Siek, Hock Chai
title	Effect of hull separation ratio and various ship draft to a low-speed catamaran in shallow water
title_short	Effect of hull separation ratio and various ship draft to a low-speed catamaran in shallow water
title_full	Effect of hull separation ratio and various ship draft to a low-speed catamaran in shallow water
title_fullStr	Effect of hull separation ratio and various ship draft to a low-speed catamaran in shallow water
title_full_unstemmed	Effect of hull separation ratio and various ship draft to a low-speed catamaran in shallow water
title_sort	effect of hull separation ratio and various ship draft to a low-speed catamaran in shallow water
granting_institution	Universiti Teknologi Malaysia, Faculty of Engineering - School of Mechanical Engineering
granting_department	Faculty of Engineering - School of Mechanical Engineering
publishDate	2022
url	http://eprints.utm.my/id/eprint/101449/1/SiekHockChaiMSKM2022.pdf
_version_	1776100700742221824

Effect of hull separation ratio and various ship draft to a low-speed catamaran in shallow water

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