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Numerical Analysis of an Axial Flow ...

Parekh, Aarshana.

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Numerical Analysis of an Axial Flow Horizontal Axis Marine Hydrokinetic Turbine.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Numerical Analysis of an Axial Flow Horizontal Axis Marine Hydrokinetic Turbine./
Author:	Parekh, Aarshana.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2019,
Description:	80 p.
Notes:	Source: Masters Abstracts International, Volume: 81-09.
Contained By:	Masters Abstracts International81-09.
Subject:	Fluid mechanics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=27670256
ISBN:	9781392515914

Numerical Analysis of an Axial Flow Horizontal Axis Marine Hydrokinetic Turbine.
Parekh, Aarshana.

Numerical Analysis of an Axial Flow Horizontal Axis Marine Hydrokinetic Turbine. - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 80 p.

Source: Masters Abstracts International, Volume: 81-09.

Thesis (Master's)--University of Washington, 2019.

This item must not be sold to any third party vendors.

Tidal energy extraction using marine hydrokinetic devices has become an important area of research in the renewable energy field in recent years because of the highly predictable nature of the tides. Due to its early stage of development, many studies need yet to be done before deployment of these devices at tidal sites. It is essential to have a thorough understanding of the turbine performance and wake properties before determining the array arrangement for tidal farms. In this thesis, flow behavior in the wake of a counter-rotating dual rotor horizontal axis tidal turbine is studied by numerically solving the Reynolds Averaged Navier Stokes (RANS) Equations. The rotational effects of the turbine are modeled using the sliding mesh technique. The realizable k-ε model is employed to solve the closure problem. The methodology is validated against experimental data measured in open channel tests conducted at the St. Anthony Falls Laboratory of the University of Minnesota, in collaboration with Sandia National Laboratory, to investigate the turbine efficiency and the physical dynamics of the wake. The transient performance of the turbine is predicted with good accuracy using the sliding mesh model, with some level of disagreement found in predicting the velocity deficit in the flow. The limitations of accurately predicting the turbulent flow properties for the turbine are addressed and the sliding mesh technique is proven to capture effectively the different coherent structures in the wake. The qualitative agreement of the method suggests that this model can be used to explore turbine design and wake characteristics over various parameters in a cost-effective manner. This method can also provide critical parameters needed for designing efficient tidal farms.

ISBN: 9781392515914Subjects--Topical Terms:

528155
Fluid mechanics.
Subjects--Index Terms:

Horizontal axis tidal turbines

Numerical Analysis of an Axial Flow Horizontal Axis Marine Hydrokinetic Turbine.
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100 1 $a Parekh, Aarshana. $3 3546231
245 1 0 $a Numerical Analysis of an Axial Flow Horizontal Axis Marine Hydrokinetic Turbine.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2019
300 $a 80 p.
500 $a Source: Masters Abstracts International, Volume: 81-09.
500 $a Advisor: Aliseda, Alberto.
502 $a Thesis (Master's)--University of Washington, 2019.
506 $a This item must not be sold to any third party vendors.
506 $a This item must not be added to any third party search indexes.
520 $a Tidal energy extraction using marine hydrokinetic devices has become an important area of research in the renewable energy field in recent years because of the highly predictable nature of the tides. Due to its early stage of development, many studies need yet to be done before deployment of these devices at tidal sites. It is essential to have a thorough understanding of the turbine performance and wake properties before determining the array arrangement for tidal farms. In this thesis, flow behavior in the wake of a counter-rotating dual rotor horizontal axis tidal turbine is studied by numerically solving the Reynolds Averaged Navier Stokes (RANS) Equations. The rotational effects of the turbine are modeled using the sliding mesh technique. The realizable k-ε model is employed to solve the closure problem. The methodology is validated against experimental data measured in open channel tests conducted at the St. Anthony Falls Laboratory of the University of Minnesota, in collaboration with Sandia National Laboratory, to investigate the turbine efficiency and the physical dynamics of the wake. The transient performance of the turbine is predicted with good accuracy using the sliding mesh model, with some level of disagreement found in predicting the velocity deficit in the flow. The limitations of accurately predicting the turbulent flow properties for the turbine are addressed and the sliding mesh technique is proven to capture effectively the different coherent structures in the wake. The qualitative agreement of the method suggests that this model can be used to explore turbine design and wake characteristics over various parameters in a cost-effective manner. This method can also provide critical parameters needed for designing efficient tidal farms.
590 $a School code: 0250.
650 4 $a Fluid mechanics. $3 528155
650 4 $a Energy. $3 876794
650 4 $a Engineering. $3 586835
653 $a Horizontal axis tidal turbines
653 $a Realizable k-ε model
653 $a Sliding mesh technology
653 $a Tidal energy
690 $a 0204
690 $a 0791
690 $a 0537
710 2 $a University of Washington. $b Mechanical Engineering. $3 2092993
773 0 $t Masters Abstracts International $g 81-09.
790 $a 0250
791 $a Master's
792 $a 2019
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=27670256