Author
Antonio Carlos Fernandes
Other affiliations: Petrobras, University of Trás-os-Montes and Alto Douro
Bio: Antonio Carlos Fernandes is an academic researcher from Federal University of Rio de Janeiro. The author has contributed to research in topics: Bilge keel & Rotation. The author has an hindex of 15, co-authored 136 publications receiving 916 citations. Previous affiliations of Antonio Carlos Fernandes include Petrobras & University of Trás-os-Montes and Alto Douro.
Topics: Bilge keel, Rotation, Moment of inertia, Vibration, Torsion spring
Papers published on a yearly basis
Papers
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TL;DR: In this article, the authors used a cold finger methodology to evaluate the formation of paraffin in the bulk of the petroleum and showed that the deposition rate depends on the temperature difference, as well as the cooling surface, the nucleation kinetics and the growth of the crystals on the cold finger surface.
60 citations
TL;DR: The results unequivocally showed that point source emissions in the Sabor (except industrial N) and stream water contamination in the Ave determine biodiversity loss.
59 citations
TL;DR: In this paper, the effect of the extra moment of inertia and the flap on the operational characteristics such as maximum attainable angular velocity and tip speed ratio, obtainable torque of the turbine and its performance is investigated.
36 citations
TL;DR: The Vertical Axis Autorotation Current Turbine (VAACT) as mentioned in this paper utilizes the extra mass moment of inertia to improve the rotational quality of the turbine and uses the autorotation phenomenon to harvest the energy from the current.
33 citations
TL;DR: In this article, the authors address two hydrodynamic aspects for the installation design and analysis of a torpedo anchor: the first is the drag evaluation and the second is the directional stability.
Abstract: The installation procedure of a torpedo anchor is the release of the torpedo from a high enough position from the sea bottom to allow the device to reach the terminal velocity. A sufficient kinetic energy at the bottom is essential for the penetration. Besides this, the anchor has to reach the bottom in an upright position to maximize the final holding power in all directions. The present work addresses two hydrodynamic aspects for the installation design and analysis. The first is the drag evaluation and the second is the directional stability. If the drag is to be kept small, then the terminal velocity should be high. The work shows that parameters like the mass and the shape are essential for this. On the other hand, the shape and mass distribution have a strong influence on the directional stability. One important parameter is the rear line length connected to the anchor. This line is necessary for further connection with the final mooring line and influences both the terminal velocity and the directional stability. The work addresses all these aspects under the light of an innovative model test setup to be performed in a deep ocean basin. This kind of model testing has been conceived specifically to attend the torpedo anchor evaluation.
32 citations
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TL;DR: The paper summarizes the works led to the current wind energy and hydro energy harvesters based on the principle of flow- induced vibrations, including bladeless generator Vortex Bladeless, University of Michigan vortex-induced vibrations aquatic clean energy, Australian BPS company's airfoil tidal energy capture device bioSTREAM, and others.
313 citations
TL;DR: In this article, structural vibrations caused by a flowing fluid were investigated and it was shown that whenever a structure is exposed to a flowing liquid, it will vibrate and vibrate strongly.
Abstract: Structural vibrations caused by a flowing fluid. Whenever a structure is exposed to a flowing fluid,…
279 citations
TL;DR: In this article, the current status of micro-hydrokinetic river (MHR) technology for rural applications is reviewed based on developments, applications, design, operation as well as different MHR technologies involved in rural electrification projects.
Abstract: Apparently, most hydrokinetic literatures mainly concentrate on large-scale technologies such as waves, tides and ocean current applications. This could be one of the reasons delaying the utilization of small-scale hydrokinetic river technology in rural areas. This paper therefore critically reviews the current status of micro-hydrokinetic river (MHR) technology for rural applications. Relevant research literatures based on developments, applications, design, operation as well as different MHR technologies involved in rural electrification projects have been reviewed. After conducting these reviews it has become clear that one of the key barriers hindering the employment of MHR technology in rural areas with access to flowing water is the lack of research demonstrating the technical, economic and environmental benefits of this technology compared to other rural electrification techniques. Studies that look towards the long-term perspective of techno-economic analysis inclusive of capital, maintenance and running costs computations need to be carried out promoting the interest in utilizing this technology. This paper will aid researchers to identify areas that need to improve as well as encourage public bodies to implement proper energy policies regarding the MHR technology usage in rural areas. It will also create awareness among site owners, investors, project developers and decision makers regarding the potential benefits of using this technology in rural areas especially in countries with little or no elevation.
186 citations
TL;DR: In this article, the authors classified vortex-induced motion phenomena into several groups which include Flutter, Transverse and Torsional Galloping, Buffeting, Vortex-Induced Vibration (VIV), and Fluttering-Autorotation.
Abstract: Vortex-induced motions are generally known as destructive phenomena for engineering structures. Nevertheless, they have a positive effect which is their great potential to extract renewable energy from the fluid flow. The phenomenology of vortex-induced motions has been studied and several energy harvesting technologies based on these motions have been reported, separately through literature. However, a comprehensive study that bonds together the phenomenology and the energy extraction technologies does not exist yet. Now that this area has become well established, classification of the relevant phenomena and technologies has become necessary as well. The present paper has two main objectives; The first objective is to classify the whole vortex-induced motion phenomena into several groups which include Flutter, Transverse and Torsional Galloping, Buffeting, Vortex-Induced Vibration (VIV), and Fluttering-Autorotation. The second objective is to review the literature, with the aim of classifying different technologies of renewable energy harvesting based on vortex-induced motion. Also, the performance characteristics and economical costs of these technologies are benchmarked.
177 citations
TL;DR: In this article, a vessel/mooring/riser coupled dynamic analysis program in time domain is developed for the global motion simulation of a turret-moored, tanker based FPSO designed for 6000-ft water depth.
128 citations