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- Publisher Website: 10.1115/1.4046317
- Scopus: eid_2-s2.0-85082012500
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Article: Numerical Simulations of Two Back-To-Back Horizontal Axis Tidal Stream Turbines in Free-Surface Flows
Title | Numerical Simulations of Two Back-To-Back Horizontal Axis Tidal Stream Turbines in Free-Surface Flows |
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Authors | |
Keywords | computational mechanics turbulence free-surface flow hydro energy |
Issue Date | 2020 |
Publisher | ASME International. The Journal's web site is located at http://asmedl.aip.org/AppliedMechanics |
Citation | Journal of Applied Mechanics, 2020, v. 87 n. 6, p. article no. 061001 How to Cite? |
Abstract | We simulate two back-to-back full-scale tidal turbines using an in-house computational free-surface flow code. We briefly present the mathematical formulation of the computational framework. We first validate the proposed method on a single turbine configuration. A mesh refinement study is conducted to ensure the result is converged. We then quantify the wake effect and free-surface effect on tidal turbine performance by a case study. To investigate the free-surface effect, we perform both pure hydrodynamics and free-surface simulations. The time history of thrust and production coefficients is quantified. In both pure hydrodynamics and free-surface flow simulations, thrust and production coefficients of the downstream turbines drop significantly due to the velocity deficit in the wake. By comparing the result between free-surface flow and pure hydrodynamics simulations for the configuration considered here, we find that the free-surface does not affect the upstream turbine but significantly affects the downstream turbine. |
Persistent Identifier | http://hdl.handle.net/10722/294619 |
ISSN | 2021 Impact Factor: 2.794 2020 SCImago Journal Rankings: 0.690 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Yan, J | - |
dc.contributor.author | Deng, X | - |
dc.contributor.author | Xu, F | - |
dc.contributor.author | Xu, S | - |
dc.contributor.author | Zhu, Q | - |
dc.date.accessioned | 2020-12-08T07:39:32Z | - |
dc.date.available | 2020-12-08T07:39:32Z | - |
dc.date.issued | 2020 | - |
dc.identifier.citation | Journal of Applied Mechanics, 2020, v. 87 n. 6, p. article no. 061001 | - |
dc.identifier.issn | 0021-8936 | - |
dc.identifier.uri | http://hdl.handle.net/10722/294619 | - |
dc.description.abstract | We simulate two back-to-back full-scale tidal turbines using an in-house computational free-surface flow code. We briefly present the mathematical formulation of the computational framework. We first validate the proposed method on a single turbine configuration. A mesh refinement study is conducted to ensure the result is converged. We then quantify the wake effect and free-surface effect on tidal turbine performance by a case study. To investigate the free-surface effect, we perform both pure hydrodynamics and free-surface simulations. The time history of thrust and production coefficients is quantified. In both pure hydrodynamics and free-surface flow simulations, thrust and production coefficients of the downstream turbines drop significantly due to the velocity deficit in the wake. By comparing the result between free-surface flow and pure hydrodynamics simulations for the configuration considered here, we find that the free-surface does not affect the upstream turbine but significantly affects the downstream turbine. | - |
dc.language | eng | - |
dc.publisher | ASME International. The Journal's web site is located at http://asmedl.aip.org/AppliedMechanics | - |
dc.relation.ispartof | Journal of Applied Mechanics | - |
dc.subject | computational mechanics | - |
dc.subject | turbulence | - |
dc.subject | free-surface flow | - |
dc.subject | hydro energy | - |
dc.title | Numerical Simulations of Two Back-To-Back Horizontal Axis Tidal Stream Turbines in Free-Surface Flows | - |
dc.type | Article | - |
dc.identifier.email | Deng, X: xwdeng@hku.hk | - |
dc.identifier.authority | Deng, X=rp02223 | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1115/1.4046317 | - |
dc.identifier.scopus | eid_2-s2.0-85082012500 | - |
dc.identifier.hkuros | 320443 | - |
dc.identifier.volume | 87 | - |
dc.identifier.issue | 6 | - |
dc.identifier.spage | article no. 061001 | - |
dc.identifier.epage | article no. 061001 | - |
dc.identifier.isi | WOS:000614425000001 | - |
dc.publisher.place | United States | - |