Turbulence and coherent structure characterisation in a tidally energetic channel
Understanding the temporal and spatial characteristics of turbulent coherent structures is of interest to the emergent sector of marine renewable energy for power generation from tidal stream turbines, as loading due to these vortex structures has resulted in costly device failure. Here, methods for...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Lucas, Natasha S. [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2022transfer abstract |
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| Schlagwörter: |
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| Umfang: |
14 |
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| Übergeordnetes Werk: |
Enthalten in: Technologies and practice of CO - HU, Yongle ELSEVIER, 2019, an international journal : the official journal of WREN, The World Renewable Energy Network, Amsterdam [u.a.] |
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| Übergeordnetes Werk: |
volume:194 ; year:2022 ; pages:259-272 ; extent:14 |
| Links: |
|---|
| DOI / URN: |
10.1016/j.renene.2022.05.044 |
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ELV058248587 |
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| 245 | 1 | 0 | |a Turbulence and coherent structure characterisation in a tidally energetic channel |
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| 520 | |a Understanding the temporal and spatial characteristics of turbulent coherent structures is of interest to the emergent sector of marine renewable energy for power generation from tidal stream turbines, as loading due to these vortex structures has resulted in costly device failure. Here, methods for characterising these coherent structures are developed in the Menai Straits, Anglesey, using an off-the-shelf broadband acoustic Doppler current profiler (ADCP) vertical beam with the metrics fast Fourier transforms and a wavelet element model. Results indicate lengthscales fall in the range 2.5–51 m. Focused study on a 30-min window finds the 5 most powerful features have a median lengthscale of 13.2 m and the strongest signal lies at ∼6.8 m, which scale to 0.86 and 0.44 times the water depth respectively, these features have a periodicity of ∼105 s. Methods using variance across ADCP beams are common for turbulence characterisation within the tidal energy sector, with turbulence intensity being appropriated from the wind energy sector. However, turbulence intensity when using an ADCP is found to be a poor predictor of water column turbulence in the presence of coherent structures. | ||
| 520 | |a Understanding the temporal and spatial characteristics of turbulent coherent structures is of interest to the emergent sector of marine renewable energy for power generation from tidal stream turbines, as loading due to these vortex structures has resulted in costly device failure. Here, methods for characterising these coherent structures are developed in the Menai Straits, Anglesey, using an off-the-shelf broadband acoustic Doppler current profiler (ADCP) vertical beam with the metrics fast Fourier transforms and a wavelet element model. Results indicate lengthscales fall in the range 2.5–51 m. Focused study on a 30-min window finds the 5 most powerful features have a median lengthscale of 13.2 m and the strongest signal lies at ∼6.8 m, which scale to 0.86 and 0.44 times the water depth respectively, these features have a periodicity of ∼105 s. Methods using variance across ADCP beams are common for turbulence characterisation within the tidal energy sector, with turbulence intensity being appropriated from the wind energy sector. However, turbulence intensity when using an ADCP is found to be a poor predictor of water column turbulence in the presence of coherent structures. | ||
| 650 | 7 | |a Variance method |2 Elsevier | |
| 650 | 7 | |a Tidal stream turbines |2 Elsevier | |
| 650 | 7 | |a Hydrodynamics |2 Elsevier | |
| 650 | 7 | |a Coherent structures |2 Elsevier | |
| 650 | 7 | |a Tidal power |2 Elsevier | |
| 650 | 7 | |a Alternative energy site assessment |2 Elsevier | |
| 700 | 1 | |a Austin, Martin J. |4 oth | |
| 700 | 1 | |a Rippeth, Tom P. |4 oth | |
| 700 | 1 | |a Powell, Ben |4 oth | |
| 700 | 1 | |a Wakonigg, Pablo |4 oth | |
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10.1016/j.renene.2022.05.044 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001850.pica (DE-627)ELV058248587 (ELSEVIER)S0960-1481(22)00682-6 DE-627 ger DE-627 rakwb eng Lucas, Natasha S. verfasserin aut Turbulence and coherent structure characterisation in a tidally energetic channel 2022transfer abstract 14 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Understanding the temporal and spatial characteristics of turbulent coherent structures is of interest to the emergent sector of marine renewable energy for power generation from tidal stream turbines, as loading due to these vortex structures has resulted in costly device failure. Here, methods for characterising these coherent structures are developed in the Menai Straits, Anglesey, using an off-the-shelf broadband acoustic Doppler current profiler (ADCP) vertical beam with the metrics fast Fourier transforms and a wavelet element model. Results indicate lengthscales fall in the range 2.5–51 m. Focused study on a 30-min window finds the 5 most powerful features have a median lengthscale of 13.2 m and the strongest signal lies at ∼6.8 m, which scale to 0.86 and 0.44 times the water depth respectively, these features have a periodicity of ∼105 s. Methods using variance across ADCP beams are common for turbulence characterisation within the tidal energy sector, with turbulence intensity being appropriated from the wind energy sector. However, turbulence intensity when using an ADCP is found to be a poor predictor of water column turbulence in the presence of coherent structures. Understanding the temporal and spatial characteristics of turbulent coherent structures is of interest to the emergent sector of marine renewable energy for power generation from tidal stream turbines, as loading due to these vortex structures has resulted in costly device failure. Here, methods for characterising these coherent structures are developed in the Menai Straits, Anglesey, using an off-the-shelf broadband acoustic Doppler current profiler (ADCP) vertical beam with the metrics fast Fourier transforms and a wavelet element model. Results indicate lengthscales fall in the range 2.5–51 m. Focused study on a 30-min window finds the 5 most powerful features have a median lengthscale of 13.2 m and the strongest signal lies at ∼6.8 m, which scale to 0.86 and 0.44 times the water depth respectively, these features have a periodicity of ∼105 s. Methods using variance across ADCP beams are common for turbulence characterisation within the tidal energy sector, with turbulence intensity being appropriated from the wind energy sector. However, turbulence intensity when using an ADCP is found to be a poor predictor of water column turbulence in the presence of coherent structures. Variance method Elsevier Tidal stream turbines Elsevier Hydrodynamics Elsevier Coherent structures Elsevier Tidal power Elsevier Alternative energy site assessment Elsevier Austin, Martin J. oth Rippeth, Tom P. oth Powell, Ben oth Wakonigg, Pablo oth Enthalten in Elsevier Science HU, Yongle ELSEVIER Technologies and practice of CO 2019 an international journal : the official journal of WREN, The World Renewable Energy Network Amsterdam [u.a.] (DE-627)ELV002723662 volume:194 year:2022 pages:259-272 extent:14 https://doi.org/10.1016/j.renene.2022.05.044 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U AR 194 2022 259-272 14 |
| spelling |
10.1016/j.renene.2022.05.044 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001850.pica (DE-627)ELV058248587 (ELSEVIER)S0960-1481(22)00682-6 DE-627 ger DE-627 rakwb eng Lucas, Natasha S. verfasserin aut Turbulence and coherent structure characterisation in a tidally energetic channel 2022transfer abstract 14 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Understanding the temporal and spatial characteristics of turbulent coherent structures is of interest to the emergent sector of marine renewable energy for power generation from tidal stream turbines, as loading due to these vortex structures has resulted in costly device failure. Here, methods for characterising these coherent structures are developed in the Menai Straits, Anglesey, using an off-the-shelf broadband acoustic Doppler current profiler (ADCP) vertical beam with the metrics fast Fourier transforms and a wavelet element model. Results indicate lengthscales fall in the range 2.5–51 m. Focused study on a 30-min window finds the 5 most powerful features have a median lengthscale of 13.2 m and the strongest signal lies at ∼6.8 m, which scale to 0.86 and 0.44 times the water depth respectively, these features have a periodicity of ∼105 s. Methods using variance across ADCP beams are common for turbulence characterisation within the tidal energy sector, with turbulence intensity being appropriated from the wind energy sector. However, turbulence intensity when using an ADCP is found to be a poor predictor of water column turbulence in the presence of coherent structures. Understanding the temporal and spatial characteristics of turbulent coherent structures is of interest to the emergent sector of marine renewable energy for power generation from tidal stream turbines, as loading due to these vortex structures has resulted in costly device failure. Here, methods for characterising these coherent structures are developed in the Menai Straits, Anglesey, using an off-the-shelf broadband acoustic Doppler current profiler (ADCP) vertical beam with the metrics fast Fourier transforms and a wavelet element model. Results indicate lengthscales fall in the range 2.5–51 m. Focused study on a 30-min window finds the 5 most powerful features have a median lengthscale of 13.2 m and the strongest signal lies at ∼6.8 m, which scale to 0.86 and 0.44 times the water depth respectively, these features have a periodicity of ∼105 s. Methods using variance across ADCP beams are common for turbulence characterisation within the tidal energy sector, with turbulence intensity being appropriated from the wind energy sector. However, turbulence intensity when using an ADCP is found to be a poor predictor of water column turbulence in the presence of coherent structures. Variance method Elsevier Tidal stream turbines Elsevier Hydrodynamics Elsevier Coherent structures Elsevier Tidal power Elsevier Alternative energy site assessment Elsevier Austin, Martin J. oth Rippeth, Tom P. oth Powell, Ben oth Wakonigg, Pablo oth Enthalten in Elsevier Science HU, Yongle ELSEVIER Technologies and practice of CO 2019 an international journal : the official journal of WREN, The World Renewable Energy Network Amsterdam [u.a.] (DE-627)ELV002723662 volume:194 year:2022 pages:259-272 extent:14 https://doi.org/10.1016/j.renene.2022.05.044 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U AR 194 2022 259-272 14 |
| allfields_unstemmed |
10.1016/j.renene.2022.05.044 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001850.pica (DE-627)ELV058248587 (ELSEVIER)S0960-1481(22)00682-6 DE-627 ger DE-627 rakwb eng Lucas, Natasha S. verfasserin aut Turbulence and coherent structure characterisation in a tidally energetic channel 2022transfer abstract 14 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Understanding the temporal and spatial characteristics of turbulent coherent structures is of interest to the emergent sector of marine renewable energy for power generation from tidal stream turbines, as loading due to these vortex structures has resulted in costly device failure. Here, methods for characterising these coherent structures are developed in the Menai Straits, Anglesey, using an off-the-shelf broadband acoustic Doppler current profiler (ADCP) vertical beam with the metrics fast Fourier transforms and a wavelet element model. Results indicate lengthscales fall in the range 2.5–51 m. Focused study on a 30-min window finds the 5 most powerful features have a median lengthscale of 13.2 m and the strongest signal lies at ∼6.8 m, which scale to 0.86 and 0.44 times the water depth respectively, these features have a periodicity of ∼105 s. Methods using variance across ADCP beams are common for turbulence characterisation within the tidal energy sector, with turbulence intensity being appropriated from the wind energy sector. However, turbulence intensity when using an ADCP is found to be a poor predictor of water column turbulence in the presence of coherent structures. Understanding the temporal and spatial characteristics of turbulent coherent structures is of interest to the emergent sector of marine renewable energy for power generation from tidal stream turbines, as loading due to these vortex structures has resulted in costly device failure. Here, methods for characterising these coherent structures are developed in the Menai Straits, Anglesey, using an off-the-shelf broadband acoustic Doppler current profiler (ADCP) vertical beam with the metrics fast Fourier transforms and a wavelet element model. Results indicate lengthscales fall in the range 2.5–51 m. Focused study on a 30-min window finds the 5 most powerful features have a median lengthscale of 13.2 m and the strongest signal lies at ∼6.8 m, which scale to 0.86 and 0.44 times the water depth respectively, these features have a periodicity of ∼105 s. Methods using variance across ADCP beams are common for turbulence characterisation within the tidal energy sector, with turbulence intensity being appropriated from the wind energy sector. However, turbulence intensity when using an ADCP is found to be a poor predictor of water column turbulence in the presence of coherent structures. Variance method Elsevier Tidal stream turbines Elsevier Hydrodynamics Elsevier Coherent structures Elsevier Tidal power Elsevier Alternative energy site assessment Elsevier Austin, Martin J. oth Rippeth, Tom P. oth Powell, Ben oth Wakonigg, Pablo oth Enthalten in Elsevier Science HU, Yongle ELSEVIER Technologies and practice of CO 2019 an international journal : the official journal of WREN, The World Renewable Energy Network Amsterdam [u.a.] (DE-627)ELV002723662 volume:194 year:2022 pages:259-272 extent:14 https://doi.org/10.1016/j.renene.2022.05.044 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U AR 194 2022 259-272 14 |
| allfieldsGer |
10.1016/j.renene.2022.05.044 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001850.pica (DE-627)ELV058248587 (ELSEVIER)S0960-1481(22)00682-6 DE-627 ger DE-627 rakwb eng Lucas, Natasha S. verfasserin aut Turbulence and coherent structure characterisation in a tidally energetic channel 2022transfer abstract 14 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Understanding the temporal and spatial characteristics of turbulent coherent structures is of interest to the emergent sector of marine renewable energy for power generation from tidal stream turbines, as loading due to these vortex structures has resulted in costly device failure. Here, methods for characterising these coherent structures are developed in the Menai Straits, Anglesey, using an off-the-shelf broadband acoustic Doppler current profiler (ADCP) vertical beam with the metrics fast Fourier transforms and a wavelet element model. Results indicate lengthscales fall in the range 2.5–51 m. Focused study on a 30-min window finds the 5 most powerful features have a median lengthscale of 13.2 m and the strongest signal lies at ∼6.8 m, which scale to 0.86 and 0.44 times the water depth respectively, these features have a periodicity of ∼105 s. Methods using variance across ADCP beams are common for turbulence characterisation within the tidal energy sector, with turbulence intensity being appropriated from the wind energy sector. However, turbulence intensity when using an ADCP is found to be a poor predictor of water column turbulence in the presence of coherent structures. Understanding the temporal and spatial characteristics of turbulent coherent structures is of interest to the emergent sector of marine renewable energy for power generation from tidal stream turbines, as loading due to these vortex structures has resulted in costly device failure. Here, methods for characterising these coherent structures are developed in the Menai Straits, Anglesey, using an off-the-shelf broadband acoustic Doppler current profiler (ADCP) vertical beam with the metrics fast Fourier transforms and a wavelet element model. Results indicate lengthscales fall in the range 2.5–51 m. Focused study on a 30-min window finds the 5 most powerful features have a median lengthscale of 13.2 m and the strongest signal lies at ∼6.8 m, which scale to 0.86 and 0.44 times the water depth respectively, these features have a periodicity of ∼105 s. Methods using variance across ADCP beams are common for turbulence characterisation within the tidal energy sector, with turbulence intensity being appropriated from the wind energy sector. However, turbulence intensity when using an ADCP is found to be a poor predictor of water column turbulence in the presence of coherent structures. Variance method Elsevier Tidal stream turbines Elsevier Hydrodynamics Elsevier Coherent structures Elsevier Tidal power Elsevier Alternative energy site assessment Elsevier Austin, Martin J. oth Rippeth, Tom P. oth Powell, Ben oth Wakonigg, Pablo oth Enthalten in Elsevier Science HU, Yongle ELSEVIER Technologies and practice of CO 2019 an international journal : the official journal of WREN, The World Renewable Energy Network Amsterdam [u.a.] (DE-627)ELV002723662 volume:194 year:2022 pages:259-272 extent:14 https://doi.org/10.1016/j.renene.2022.05.044 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U AR 194 2022 259-272 14 |
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10.1016/j.renene.2022.05.044 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001850.pica (DE-627)ELV058248587 (ELSEVIER)S0960-1481(22)00682-6 DE-627 ger DE-627 rakwb eng Lucas, Natasha S. verfasserin aut Turbulence and coherent structure characterisation in a tidally energetic channel 2022transfer abstract 14 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Understanding the temporal and spatial characteristics of turbulent coherent structures is of interest to the emergent sector of marine renewable energy for power generation from tidal stream turbines, as loading due to these vortex structures has resulted in costly device failure. Here, methods for characterising these coherent structures are developed in the Menai Straits, Anglesey, using an off-the-shelf broadband acoustic Doppler current profiler (ADCP) vertical beam with the metrics fast Fourier transforms and a wavelet element model. Results indicate lengthscales fall in the range 2.5–51 m. Focused study on a 30-min window finds the 5 most powerful features have a median lengthscale of 13.2 m and the strongest signal lies at ∼6.8 m, which scale to 0.86 and 0.44 times the water depth respectively, these features have a periodicity of ∼105 s. Methods using variance across ADCP beams are common for turbulence characterisation within the tidal energy sector, with turbulence intensity being appropriated from the wind energy sector. However, turbulence intensity when using an ADCP is found to be a poor predictor of water column turbulence in the presence of coherent structures. Understanding the temporal and spatial characteristics of turbulent coherent structures is of interest to the emergent sector of marine renewable energy for power generation from tidal stream turbines, as loading due to these vortex structures has resulted in costly device failure. Here, methods for characterising these coherent structures are developed in the Menai Straits, Anglesey, using an off-the-shelf broadband acoustic Doppler current profiler (ADCP) vertical beam with the metrics fast Fourier transforms and a wavelet element model. Results indicate lengthscales fall in the range 2.5–51 m. Focused study on a 30-min window finds the 5 most powerful features have a median lengthscale of 13.2 m and the strongest signal lies at ∼6.8 m, which scale to 0.86 and 0.44 times the water depth respectively, these features have a periodicity of ∼105 s. Methods using variance across ADCP beams are common for turbulence characterisation within the tidal energy sector, with turbulence intensity being appropriated from the wind energy sector. However, turbulence intensity when using an ADCP is found to be a poor predictor of water column turbulence in the presence of coherent structures. Variance method Elsevier Tidal stream turbines Elsevier Hydrodynamics Elsevier Coherent structures Elsevier Tidal power Elsevier Alternative energy site assessment Elsevier Austin, Martin J. oth Rippeth, Tom P. oth Powell, Ben oth Wakonigg, Pablo oth Enthalten in Elsevier Science HU, Yongle ELSEVIER Technologies and practice of CO 2019 an international journal : the official journal of WREN, The World Renewable Energy Network Amsterdam [u.a.] (DE-627)ELV002723662 volume:194 year:2022 pages:259-272 extent:14 https://doi.org/10.1016/j.renene.2022.05.044 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U AR 194 2022 259-272 14 |
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turbulence and coherent structure characterisation in a tidally energetic channel |
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Turbulence and coherent structure characterisation in a tidally energetic channel |
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Understanding the temporal and spatial characteristics of turbulent coherent structures is of interest to the emergent sector of marine renewable energy for power generation from tidal stream turbines, as loading due to these vortex structures has resulted in costly device failure. Here, methods for characterising these coherent structures are developed in the Menai Straits, Anglesey, using an off-the-shelf broadband acoustic Doppler current profiler (ADCP) vertical beam with the metrics fast Fourier transforms and a wavelet element model. Results indicate lengthscales fall in the range 2.5–51 m. Focused study on a 30-min window finds the 5 most powerful features have a median lengthscale of 13.2 m and the strongest signal lies at ∼6.8 m, which scale to 0.86 and 0.44 times the water depth respectively, these features have a periodicity of ∼105 s. Methods using variance across ADCP beams are common for turbulence characterisation within the tidal energy sector, with turbulence intensity being appropriated from the wind energy sector. However, turbulence intensity when using an ADCP is found to be a poor predictor of water column turbulence in the presence of coherent structures. |
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Understanding the temporal and spatial characteristics of turbulent coherent structures is of interest to the emergent sector of marine renewable energy for power generation from tidal stream turbines, as loading due to these vortex structures has resulted in costly device failure. Here, methods for characterising these coherent structures are developed in the Menai Straits, Anglesey, using an off-the-shelf broadband acoustic Doppler current profiler (ADCP) vertical beam with the metrics fast Fourier transforms and a wavelet element model. Results indicate lengthscales fall in the range 2.5–51 m. Focused study on a 30-min window finds the 5 most powerful features have a median lengthscale of 13.2 m and the strongest signal lies at ∼6.8 m, which scale to 0.86 and 0.44 times the water depth respectively, these features have a periodicity of ∼105 s. Methods using variance across ADCP beams are common for turbulence characterisation within the tidal energy sector, with turbulence intensity being appropriated from the wind energy sector. However, turbulence intensity when using an ADCP is found to be a poor predictor of water column turbulence in the presence of coherent structures. |
| abstract_unstemmed |
Understanding the temporal and spatial characteristics of turbulent coherent structures is of interest to the emergent sector of marine renewable energy for power generation from tidal stream turbines, as loading due to these vortex structures has resulted in costly device failure. Here, methods for characterising these coherent structures are developed in the Menai Straits, Anglesey, using an off-the-shelf broadband acoustic Doppler current profiler (ADCP) vertical beam with the metrics fast Fourier transforms and a wavelet element model. Results indicate lengthscales fall in the range 2.5–51 m. Focused study on a 30-min window finds the 5 most powerful features have a median lengthscale of 13.2 m and the strongest signal lies at ∼6.8 m, which scale to 0.86 and 0.44 times the water depth respectively, these features have a periodicity of ∼105 s. Methods using variance across ADCP beams are common for turbulence characterisation within the tidal energy sector, with turbulence intensity being appropriated from the wind energy sector. However, turbulence intensity when using an ADCP is found to be a poor predictor of water column turbulence in the presence of coherent structures. |
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