The effects of blade twist and nacelle shape on the performance of horizontal axis tidal current turbines

32 p.

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Main Authors: Liu, Jing, Lin, Htet, Purimitla, Srinivasa Rao, Mohan Dass, E.T.
Other Authors: Energy Research Institute @ NTU (ERI@N)
Format: Article
Language:English
Published: 2017
Subjects:
Online Access:https://hdl.handle.net/10356/82100
http://hdl.handle.net/10220/42301
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-821002021-01-08T06:18:06Z The effects of blade twist and nacelle shape on the performance of horizontal axis tidal current turbines Liu, Jing Lin, Htet Purimitla, Srinivasa Rao Mohan Dass, E.T. Energy Research Institute @ NTU (ERI@N) Tidal current turbine Hydrofoil 32 p. The paper presents the effects of blade twist and nacelle shape on the performance of horizontal axis tidal current turbines using both analytical and numerical methods. Firstly, in the hydrodynamic design procedure, the optimal profiles of untwisted and twisted blades and their predicted theoretical turbine performance are obtained using the genetic algorithm method. Although both blade profiles produce desired rated rotational speed, the twisted blade achieves higher power and thrust performance. Secondly, numerical simulation is performed using sliding mesh technique to mimic rotating turbine in ANSYS FLUENT to validate the analytical results. The Reynolds-Averaged Navier-Stokes (RANS) approximation of the turbulence parameters is applied to obtain the flow field around the turbine. It is found that power and axial thrust force from BEMT (Blade Element Momentum Theory) method are under-predicted by 2% and 8% respectively, compared with numerical results. Afterwards, the downstream wake field of the turbine is investigated with two different nacelle shapes. It is found that the rotor performance is not significantly affected by the different nacelle shapes. However, the structural turbulence caused by the conventional nacelle is stronger than that by the NACA-profiled shape, and the former can cause detrimental effect on the performance of the downstream turbines in tidal farms. Accepted Version 2017-04-28T07:06:08Z 2019-12-06T14:46:34Z 2017-04-28T07:06:08Z 2019-12-06T14:46:34Z 2017 2017 Journal Article Liu, J., Lin, H., Purimitla, S. R., & Mohan Dass, E.T. (2017). The effects of blade twist and nacelle shape on the performance of horizontal axis tidal current turbines. Applied Ocean Research, 64, 58-69. 0141-1187 https://hdl.handle.net/10356/82100 http://hdl.handle.net/10220/42301 10.1016/j.apor.2017.02.003 198283 en Applied Ocean Research © 2017 Elsevier Ltd. This is the author created version of a work that has been peer reviewed and accepted for publication by Applied Ocean Research, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [https://doi.org/10.1016/j.apor.2017.02.003]. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Tidal current turbine
Hydrofoil
spellingShingle Tidal current turbine
Hydrofoil
Liu, Jing
Lin, Htet
Purimitla, Srinivasa Rao
Mohan Dass, E.T.
The effects of blade twist and nacelle shape on the performance of horizontal axis tidal current turbines
description 32 p.
author2 Energy Research Institute @ NTU (ERI@N)
author_facet Energy Research Institute @ NTU (ERI@N)
Liu, Jing
Lin, Htet
Purimitla, Srinivasa Rao
Mohan Dass, E.T.
format Article
author Liu, Jing
Lin, Htet
Purimitla, Srinivasa Rao
Mohan Dass, E.T.
author_sort Liu, Jing
title The effects of blade twist and nacelle shape on the performance of horizontal axis tidal current turbines
title_short The effects of blade twist and nacelle shape on the performance of horizontal axis tidal current turbines
title_full The effects of blade twist and nacelle shape on the performance of horizontal axis tidal current turbines
title_fullStr The effects of blade twist and nacelle shape on the performance of horizontal axis tidal current turbines
title_full_unstemmed The effects of blade twist and nacelle shape on the performance of horizontal axis tidal current turbines
title_sort effects of blade twist and nacelle shape on the performance of horizontal axis tidal current turbines
publishDate 2017
url https://hdl.handle.net/10356/82100
http://hdl.handle.net/10220/42301
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