Effect of air cushion on the resistance reduction of Multi-purpose Amphibious Vehicle (MAV) in calm and waves water

In a recent year, shipping industry had been extensively developed as a countermeasure from economic growth of a country, rise of raw materials price as well as the regulations for CO2 emission from international shipping operation The combustion process of ship engine will emit the greenhouse gases...

Full description

Saved in:

Bibliographic Details
Main Author:	Abd. Rahman, Nur Ain
Format:	Thesis
Language:	English
Published:	2017
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://eprints.utm.my/id/eprint/78926/1/NurAinAbdMFKM2017.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-utm-ep.78926
record_format	uketd_dc
spelling	my-utm-ep.789262018-09-17T07:23:17Z Effect of air cushion on the resistance reduction of Multi-purpose Amphibious Vehicle (MAV) in calm and waves water 2017-01 Abd. Rahman, Nur Ain TJ Mechanical engineering and machinery In a recent year, shipping industry had been extensively developed as a countermeasure from economic growth of a country, rise of raw materials price as well as the regulations for CO2 emission from international shipping operation The combustion process of ship engine will emit the greenhouse gases which are carbon dioxide (Co2), Sulphur dioxide (Sox), Nitrogen dioxide (Nox), as well as particulate matter which contribute to greenhouse effect. A concern from the public on this situation had lead the academician and transportation industry to extensive developed and explored on fuel-efficient and energy concept ship. Multi Amphibious Vehicle (MAV) is a transport that able to navigate on land and water including under water. MAV have a blunt-shape bow where it produces a large bow wave forming and hydrodynamic resistance resulted increase on power consumption. A higher in resistance also resulted in a bow submerging and swamping on the MAV. So, the air cushion concept is introduced to reduce these problems. In this research, the resistance acting on Multi Amphibious Vehicle (MAV) hull navigated in calm and regular waves condition is investigated experimentally and numerically. A simplified MAV model for computing resistance of air cushion effect on regular head waves is established. Simulations were carried out in finite element analysis ANSYS CFX 15.0 in two different wave height conditions which were 0.5m and 0.75m to study on the MAV resistance and also its motion. The resistances and the motion of MAV model with and without the air cushion effect were compared in a graph of total resistance versus MAV speed. The maximum resistance reductions occur at forward speed 6kn with 0.2 l/s air flow rate injection for both wave height 0.5m and 0.75m at 10.89% and 8.65 %. It is noticeable that, air cushion effect also gives a slightly improvement on ship motion in heaving and pitching. 2017-01 Thesis http://eprints.utm.my/id/eprint/78926/ http://eprints.utm.my/id/eprint/78926/1/NurAinAbdMFKM2017.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:109654 masters Universiti Teknologi Malaysia, Faculty of Mechanical Engineering Faculty 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 Abd. Rahman, Nur Ain Effect of air cushion on the resistance reduction of Multi-purpose Amphibious Vehicle (MAV) in calm and waves water
description	In a recent year, shipping industry had been extensively developed as a countermeasure from economic growth of a country, rise of raw materials price as well as the regulations for CO2 emission from international shipping operation The combustion process of ship engine will emit the greenhouse gases which are carbon dioxide (Co2), Sulphur dioxide (Sox), Nitrogen dioxide (Nox), as well as particulate matter which contribute to greenhouse effect. A concern from the public on this situation had lead the academician and transportation industry to extensive developed and explored on fuel-efficient and energy concept ship. Multi Amphibious Vehicle (MAV) is a transport that able to navigate on land and water including under water. MAV have a blunt-shape bow where it produces a large bow wave forming and hydrodynamic resistance resulted increase on power consumption. A higher in resistance also resulted in a bow submerging and swamping on the MAV. So, the air cushion concept is introduced to reduce these problems. In this research, the resistance acting on Multi Amphibious Vehicle (MAV) hull navigated in calm and regular waves condition is investigated experimentally and numerically. A simplified MAV model for computing resistance of air cushion effect on regular head waves is established. Simulations were carried out in finite element analysis ANSYS CFX 15.0 in two different wave height conditions which were 0.5m and 0.75m to study on the MAV resistance and also its motion. The resistances and the motion of MAV model with and without the air cushion effect were compared in a graph of total resistance versus MAV speed. The maximum resistance reductions occur at forward speed 6kn with 0.2 l/s air flow rate injection for both wave height 0.5m and 0.75m at 10.89% and 8.65 %. It is noticeable that, air cushion effect also gives a slightly improvement on ship motion in heaving and pitching.
format	Thesis
qualification_level	Master's degree
author	Abd. Rahman, Nur Ain
author_facet	Abd. Rahman, Nur Ain
author_sort	Abd. Rahman, Nur Ain
title	Effect of air cushion on the resistance reduction of Multi-purpose Amphibious Vehicle (MAV) in calm and waves water
title_short	Effect of air cushion on the resistance reduction of Multi-purpose Amphibious Vehicle (MAV) in calm and waves water
title_full	Effect of air cushion on the resistance reduction of Multi-purpose Amphibious Vehicle (MAV) in calm and waves water
title_fullStr	Effect of air cushion on the resistance reduction of Multi-purpose Amphibious Vehicle (MAV) in calm and waves water
title_full_unstemmed	Effect of air cushion on the resistance reduction of Multi-purpose Amphibious Vehicle (MAV) in calm and waves water
title_sort	effect of air cushion on the resistance reduction of multi-purpose amphibious vehicle (mav) in calm and waves water
granting_institution	Universiti Teknologi Malaysia, Faculty of Mechanical Engineering
granting_department	Faculty of Mechanical Engineering
publishDate	2017
url	http://eprints.utm.my/id/eprint/78926/1/NurAinAbdMFKM2017.pdf
_version_	1747818105369788416

Effect of air cushion on the resistance reduction of Multi-purpose Amphibious Vehicle (MAV) in calm and waves water

Similar Items