Effects of orifice size on the efficiency of a heaving oscillating water column
Oscillating water columns (OWCs) have been studied extensively as promising wave energy converters. Different factors can affect the pneumatic power of OWCs, such as model scaling, turbine damping, and air compressibility. In this study, the heave motion of the OWC was limited by adding friction, an...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2022-12-01
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| Series: | Engineering Applications of Computational Fluid Mechanics |
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| Online Access: | http://dx.doi.org/10.1080/19942060.2022.2042391 |
| _version_ | 1819279588242489344 |
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| author | Qing Fan Jie-min Zhan Wen-qing Hu Zi-wei Huang |
| author_facet | Qing Fan Jie-min Zhan Wen-qing Hu Zi-wei Huang |
| author_sort | Qing Fan |
| collection | DOAJ |
| description | Oscillating water columns (OWCs) have been studied extensively as promising wave energy converters. Different factors can affect the pneumatic power of OWCs, such as model scaling, turbine damping, and air compressibility. In this study, the heave motion of the OWC was limited by adding friction, and the effect of orifice size on the pneumatic power of an OWC from an unconstrained to a fixed position was investigated using a numerical method combining the k-ε/laminar model, the VOF interface capturing method, the motion-based zonal mesh update method and the 6DOF solver. Two groups of validation experiments and a study of model scaling were carried out to verify the effectiveness of the numerical method. It is concluded that the orifice open area ratio has an optimal value of approximately 1% whether the model is stationary or heaving; however, the heave motion has a significant weakening effect on the pneumatic power. More power can be extracted by constraining the heave motion of the OWC. |
| first_indexed | 2024-12-24T00:30:17Z |
| format | Article |
| id | doaj.art-50972bcdd1034b29be5ae6201d42567d |
| institution | Directory Open Access Journal |
| issn | 1994-2060 1997-003X |
| language | English |
| last_indexed | 2024-12-24T00:30:17Z |
| publishDate | 2022-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Engineering Applications of Computational Fluid Mechanics |
| spelling | doaj.art-50972bcdd1034b29be5ae6201d42567d2022-12-21T17:24:17ZengTaylor & Francis GroupEngineering Applications of Computational Fluid Mechanics1994-20601997-003X2022-12-0116166667610.1080/19942060.2022.20423912042391Effects of orifice size on the efficiency of a heaving oscillating water columnQing Fan0Jie-min Zhan1Wen-qing Hu2Zi-wei Huang3Sun Yat-sen UniversitySun Yat-sen UniversitySun Yat-sen UniversitySun Yat-sen UniversityOscillating water columns (OWCs) have been studied extensively as promising wave energy converters. Different factors can affect the pneumatic power of OWCs, such as model scaling, turbine damping, and air compressibility. In this study, the heave motion of the OWC was limited by adding friction, and the effect of orifice size on the pneumatic power of an OWC from an unconstrained to a fixed position was investigated using a numerical method combining the k-ε/laminar model, the VOF interface capturing method, the motion-based zonal mesh update method and the 6DOF solver. Two groups of validation experiments and a study of model scaling were carried out to verify the effectiveness of the numerical method. It is concluded that the orifice open area ratio has an optimal value of approximately 1% whether the model is stationary or heaving; however, the heave motion has a significant weakening effect on the pneumatic power. More power can be extracted by constraining the heave motion of the OWC.http://dx.doi.org/10.1080/19942060.2022.2042391oscillating water columnpneumatic poweropen area ratioheave motionmodel scaling |
| spellingShingle | Qing Fan Jie-min Zhan Wen-qing Hu Zi-wei Huang Effects of orifice size on the efficiency of a heaving oscillating water column Engineering Applications of Computational Fluid Mechanics oscillating water column pneumatic power open area ratio heave motion model scaling |
| title | Effects of orifice size on the efficiency of a heaving oscillating water column |
| title_full | Effects of orifice size on the efficiency of a heaving oscillating water column |
| title_fullStr | Effects of orifice size on the efficiency of a heaving oscillating water column |
| title_full_unstemmed | Effects of orifice size on the efficiency of a heaving oscillating water column |
| title_short | Effects of orifice size on the efficiency of a heaving oscillating water column |
| title_sort | effects of orifice size on the efficiency of a heaving oscillating water column |
| topic | oscillating water column pneumatic power open area ratio heave motion model scaling |
| url | http://dx.doi.org/10.1080/19942060.2022.2042391 |
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