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Yaakob, O. B.
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Aerospace Engineering Decision Sciences, Operations Research & Management Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Wells Turbine for Wave Energy Conversion for Malaysian Ocean Ahmed, Yasser M.; Yaakob, O. B.; Elbatran, A. H.; Mazukee, U. J. A.
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 8 No 1 (2014): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v8i1.491

Abstract

Malaysia is surrounded by ocean, therefore Malaysia is a perfect candidate for harvesting ocean energy as electrical generator to distribute to main grid. Malaysian electrical generation still greatly influences by non-renewable energy and the electrical cost increase as the natural resource depleting. The only solution for this problem is to use renewable energy, due to geography of Malaysian land which surround by ocean; ocean energy is the best renewable energy for Malaysia. One method of converting this energy is to use Oscillating Water Column using wells turbine as converter from pneumatic energy to mechanical energy thus convert by generator to electrical energy. However, wave characteristic of Malaysian ocean make conversion of wave energy really difficult.Some parameter that affect the performance of wells turbine need to be changed, so the new geometry turbine can work effectively in Malaysian ocean of the poor ocean characteristics such as low wave high and low frequency. According to Malaysian wave data, the average wave height is from 0.5m to 1.5m with average wave frequency of 0.1 to 0.3Hz and wave period 3.34s to 10s.
Pressure Distribution at Water Entry of a Symmetrical Wedge Nikfarjam, M.; Koto, Jaswar; Yaakob, O. B.; Seif, M. S.; Aref, A.
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 12 No 1 (2014): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v12i1.475

Abstract

In current study, numerical and experimental investigations about water entry problem were conducted for a symmetrical wedge. The water entry problem for different geometries is one of the classical methods for determination of pressure distribution and loads around the hull of marine vehicles. These data can be used for optimum structural design of vessels particularly for high-speed crafts, which are very sensitive about the weight. In addition, the quantity of load can be considered in the equation of motion for analyzing the seakeeping performance of such vessels. In this research, the numerical analysis of free falling wedge with 30° deadrise with constant weight was done and for validation of results, it was followed by experimental tests. The outputs of this study consist of some graphs for comparison of trends for pressures respect to impact time, which can be used for signification of loads on hulls during the water entry phase.
Co-Authors Ahmed, Yasser M. Aref, A. Elbatran, A. H. Koto, Jaswar Mazukee, U. J. A. Nikfarjam, M. Seif, M. S.