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TOWARD A CONTACTLESS HYDROKINETIC ENERGY HARVESTER: A COMPUTATIONAL MAGNETIC FIELD ESTIMATION

Tsakyridis, Georgios and Xiros, Nikolaos and Bernitsas, Michael (2018) TOWARD A CONTACTLESS HYDROKINETIC ENERGY HARVESTER: A COMPUTATIONAL MAGNETIC FIELD ESTIMATION. In: ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE). ASME 2018 International Mechanical Engineering Congress and Exposition IMECE2018, 09. - 15. Nov. 2018, Pittsburgh, USA. DOI: 10.1115/IMECE2018-87063

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Official URL: http://proceedings.asmedigitalcollection.asme.org/conferenceproceedings.aspx

Abstract

Magnetic levitation (maglev) concepts are applied to a variety of industries such as the automotive, aerospace, or energy in order to accomplish different tasks: suspension and propulsion in maglev trains, rocket propulsion and spacecraft attitude control, centrifuge of nuclear reactors. In this paper, maglev is implemented in environmentally friendly hydrokinetic energy harvesting to achieve contactless bearing, thus, minimizing friction and improving efficiency. Generally, maglev systems exhibit higher efficiency and reduced maintenance while providing longer lifetime and higher durability when appropriate engineering design and control are applied. A Flow Induced Oscillation (FIO) energy-harvesting converter is considered in this work. To minimize friction in the support of the cylinder in FIO (vortex induced vibrations and galloping) due to high hydrodynamic drag, a maglev system is proposed. In the proposed configuration, a ferromagnetic core (element 1), of known dimensions, is considered under the effects of an externally imposed magnetic field. A second ferromagnetic element, of smaller dimensions, is then placed adjacent to the previous considered core. This particular configuration results in a non-homogenous magnetic field for element 1, caused by dimensional disparity. Specifically, the magnetic flux does not follow a linear path from the ferromagnetic core to element 2. A general electromagnetic analysis is conducted to derive an analytical form for the magnetic field of element 1. Subsequent numerical simulation validates the obtained formula. This distinct expression for the magnetic field is valuable towards calculating the magnetic energy of this specific configuration, which is essential to the design of the FIO energy harvesting converter considered in this work.

Item URL in elib:https://elib.dlr.de/124601/
Document Type:Conference or Workshop Item (Speech)
Title:TOWARD A CONTACTLESS HYDROKINETIC ENERGY HARVESTER: A COMPUTATIONAL MAGNETIC FIELD ESTIMATION
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Tsakyridis, GeorgiosGeorgios.Tsakyridis (at) dlr.deUNSPECIFIED
Xiros, NikolaosUniversity of New OrleansUNSPECIFIED
Bernitsas, MichaelUniversity of MichiganUNSPECIFIED
Date:2018
Journal or Publication Title:ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
DOI :10.1115/IMECE2018-87063
Series Name:Proceedings of the ASME 2018 International Mechanical Engineering Congress and Exposition IMECE2018
Status:Published
Keywords:robotic exploration, ocean engineering, power systems
Event Title:ASME 2018 International Mechanical Engineering Congress and Exposition IMECE2018
Event Location:Pittsburgh, USA
Event Type:international Conference
Event Dates:09. - 15. Nov. 2018
Organizer:American Society of Mechanical Engineers
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Explorationsstudien
Location: Bremen
Institutes and Institutions:Institute of Space Systems > Land and Exploration Technology
Deposited By: Witte, Dr. Lars
Deposited On:11 Dec 2018 09:51
Last Modified:11 Dec 2018 09:51

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