Analytical wake model of tidal current turbine
Prediction of the wake structure is important to understand the lee flow of a tidal current turbine. The proposed analytical wake model consists of several equations derived from the theoretical works of a ship propeller jet. Axial momentum theory was used to predict the minimum velocity at the imme...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2015
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| Online Access: | http://eprints.um.edu.my/14043/1/Analytical_wake_model_of_tidal_current_turbine.pdf |
| _version_ | 1796946682398638080 |
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| author | Lam, W.H. Chen, L. Hashim, Roslan |
| author_facet | Lam, W.H. Chen, L. Hashim, Roslan |
| author_sort | Lam, W.H. |
| collection | UM |
| description | Prediction of the wake structure is important to understand the lee flow of a tidal current turbine. The proposed analytical wake model consists of several equations derived from the theoretical works of a ship propeller jet. Axial momentum theory was used to predict the minimum velocity at the immediate plane of the lee wake and followed by the proposed recovery equation to determine the minimum velocity at various lateral sections along the rotation axis. Gaussian probability distribution was used to predict the velocity distribution of lateral sections in a wake. Entire wake is able to be illustrated through the calculation of the efflux equation, recovery equation and lateral distribution equations. Authors' previous works proposed a simplified one-dipped velocity profile and this works were being extended to predict the two-dipped velocity profile with the consideration of hub effects. The wake model is validated by using the well-accepted experimental measurements and the goodness-of-fit test. The results demonstrated that the wake model is able to predict the wake profile under various ambient turbulence conditions of TI (turbulence intensity) = 3, 5, 8 and 15. (C) 2014 Elsevier Ltd. All rights reserved. |
| first_indexed | 2024-03-06T05:35:30Z |
| format | Article |
| id | um.eprints-14043 |
| institution | Universiti Malaya |
| language | English |
| last_indexed | 2024-03-06T05:35:30Z |
| publishDate | 2015 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | um.eprints-140432019-05-31T05:22:23Z http://eprints.um.edu.my/14043/ Analytical wake model of tidal current turbine Lam, W.H. Chen, L. Hashim, Roslan T Technology (General) TA Engineering (General). Civil engineering (General) Prediction of the wake structure is important to understand the lee flow of a tidal current turbine. The proposed analytical wake model consists of several equations derived from the theoretical works of a ship propeller jet. Axial momentum theory was used to predict the minimum velocity at the immediate plane of the lee wake and followed by the proposed recovery equation to determine the minimum velocity at various lateral sections along the rotation axis. Gaussian probability distribution was used to predict the velocity distribution of lateral sections in a wake. Entire wake is able to be illustrated through the calculation of the efflux equation, recovery equation and lateral distribution equations. Authors' previous works proposed a simplified one-dipped velocity profile and this works were being extended to predict the two-dipped velocity profile with the consideration of hub effects. The wake model is validated by using the well-accepted experimental measurements and the goodness-of-fit test. The results demonstrated that the wake model is able to predict the wake profile under various ambient turbulence conditions of TI (turbulence intensity) = 3, 5, 8 and 15. (C) 2014 Elsevier Ltd. All rights reserved. Elsevier 2015-01-01 Article PeerReviewed application/pdf en http://eprints.um.edu.my/14043/1/Analytical_wake_model_of_tidal_current_turbine.pdf Lam, W.H. and Chen, L. and Hashim, Roslan (2015) Analytical wake model of tidal current turbine. Energy, 79. pp. 512-521. ISSN 0360-5442, DOI https://doi.org/10.1016/j.energy.2014.11.047 <https://doi.org/10.1016/j.energy.2014.11.047>. http://www.sciencedirect.com/science/article/pii/S0360544214013024 doi:10.1016/j.energy.2014.11.047 |
| spellingShingle | T Technology (General) TA Engineering (General). Civil engineering (General) Lam, W.H. Chen, L. Hashim, Roslan Analytical wake model of tidal current turbine |
| title | Analytical wake model of tidal current turbine |
| title_full | Analytical wake model of tidal current turbine |
| title_fullStr | Analytical wake model of tidal current turbine |
| title_full_unstemmed | Analytical wake model of tidal current turbine |
| title_short | Analytical wake model of tidal current turbine |
| title_sort | analytical wake model of tidal current turbine |
| topic | T Technology (General) TA Engineering (General). Civil engineering (General) |
| url | http://eprints.um.edu.my/14043/1/Analytical_wake_model_of_tidal_current_turbine.pdf |
| work_keys_str_mv | AT lamwh analyticalwakemodeloftidalcurrentturbine AT chenl analyticalwakemodeloftidalcurrentturbine AT hashimroslan analyticalwakemodeloftidalcurrentturbine |