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Geometrical investigation of a U-shaped oscillating water column wave energy device
•The hydrodynamics of a U-OWC device is numerically investigated.•The effect of geometric parameters on the hydrodynamic performance are discussed.•The larger vertical duct height, the higher hydrodynamic efficiency.•The hydrodynamic efficiency increases with the vertical duct width in some extent.•...
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| Published in: | Applied ocean research 2020-04, Vol.97, p.102105-10, Article 102105 |
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| container_start_page | 102105 |
| container_title | Applied ocean research |
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| creator | Ning, De-zhi Guo, Bao-ming Wang, Rong-quan Vyzikas, Thomas Greaves, Deborah |
| description | •The hydrodynamics of a U-OWC device is numerically investigated.•The effect of geometric parameters on the hydrodynamic performance are discussed.•The larger vertical duct height, the higher hydrodynamic efficiency.•The hydrodynamic efficiency increases with the vertical duct width in some extent.•The hydrodynamic efficiency increases with the front wall thickness of the vertical duct.
Hydrodynamic performance of a fixed U-shaped oscillating water column (U-OWC) wave energy converter is numerically investigated. Based on the time-domain higher-order boundary element method (HOBEM), a two-dimensional fully nonlinear numerical model is implemented to simulate the nonlinear wave interaction with a U-OWC device. In the model, the inner-domain-source method is adopted to generate incident waves and a linear pneumatic model is used to determine the air pressure which is imposed on the free surface inside the chamber. The numerical model is well validated against the published experimental data of the free surface elevation at the chamber centre, air pressure inside the chamber and hydrodynamic efficiency. Further, the present model is applied to study the effects of geometrical parameters (including the vertical duct height, vertical duct width and wall thickness) on the hydrodynamic performances of the U-OWC device. The results indicate that geometrical parameters of the vertical duct have significant influence on the air pressure inside the chamber and the hydrodynamic efficiency. The hydrodynamic efficiency and air pressure inside the chamber are found to increase with the increase of both vertical duct height and thickness of wall I. However, the increasing rate of the efficiency slows down gradually with the thickness of wall I increasing, which indicates that a comprehensive consideration of the construction cost and hydrodynamic performance is needed in the design and construction of a U-OWC device. |
| doi_str_mv | 10.1016/j.apor.2020.102105 |
| format | article |
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Hydrodynamic performance of a fixed U-shaped oscillating water column (U-OWC) wave energy converter is numerically investigated. Based on the time-domain higher-order boundary element method (HOBEM), a two-dimensional fully nonlinear numerical model is implemented to simulate the nonlinear wave interaction with a U-OWC device. In the model, the inner-domain-source method is adopted to generate incident waves and a linear pneumatic model is used to determine the air pressure which is imposed on the free surface inside the chamber. The numerical model is well validated against the published experimental data of the free surface elevation at the chamber centre, air pressure inside the chamber and hydrodynamic efficiency. Further, the present model is applied to study the effects of geometrical parameters (including the vertical duct height, vertical duct width and wall thickness) on the hydrodynamic performances of the U-OWC device. The results indicate that geometrical parameters of the vertical duct have significant influence on the air pressure inside the chamber and the hydrodynamic efficiency. The hydrodynamic efficiency and air pressure inside the chamber are found to increase with the increase of both vertical duct height and thickness of wall I. However, the increasing rate of the efficiency slows down gradually with the thickness of wall I increasing, which indicates that a comprehensive consideration of the construction cost and hydrodynamic performance is needed in the design and construction of a U-OWC device.</description><identifier>ISSN: 0141-1187</identifier><identifier>EISSN: 1879-1549</identifier><identifier>DOI: 10.1016/j.apor.2020.102105</identifier><language>eng</language><publisher>Barking: Elsevier Ltd</publisher><subject>Air ; Construction ; Efficiency ; Free surfaces ; Height ; HOBEM ; Hydrodynamic efficiency ; Hydrodynamics ; Mathematical models ; Nonlinear wave interactions ; Nonlinear waves ; Nonlinearity ; Parameters ; Pressure ; U-OWC ; Water column ; Wave energy ; Wave power</subject><ispartof>Applied ocean research, 2020-04, Vol.97, p.102105-10, Article 102105</ispartof><rights>2020 Elsevier Ltd</rights><rights>Copyright Elsevier BV Apr 2020</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c372t-8859ff61c44a377787b4eebbe0577ac5ec4a7f51e8366c64d7bc705d1ecfb0aa3</citedby><cites>FETCH-LOGICAL-c372t-8859ff61c44a377787b4eebbe0577ac5ec4a7f51e8366c64d7bc705d1ecfb0aa3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>315,783,787,27936,27937</link.rule.ids></links><search><creatorcontrib>Ning, De-zhi</creatorcontrib><creatorcontrib>Guo, Bao-ming</creatorcontrib><creatorcontrib>Wang, Rong-quan</creatorcontrib><creatorcontrib>Vyzikas, Thomas</creatorcontrib><creatorcontrib>Greaves, Deborah</creatorcontrib><title>Geometrical investigation of a U-shaped oscillating water column wave energy device</title><title>Applied ocean research</title><description>•The hydrodynamics of a U-OWC device is numerically investigated.•The effect of geometric parameters on the hydrodynamic performance are discussed.•The larger vertical duct height, the higher hydrodynamic efficiency.•The hydrodynamic efficiency increases with the vertical duct width in some extent.•The hydrodynamic efficiency increases with the front wall thickness of the vertical duct.
Hydrodynamic performance of a fixed U-shaped oscillating water column (U-OWC) wave energy converter is numerically investigated. Based on the time-domain higher-order boundary element method (HOBEM), a two-dimensional fully nonlinear numerical model is implemented to simulate the nonlinear wave interaction with a U-OWC device. In the model, the inner-domain-source method is adopted to generate incident waves and a linear pneumatic model is used to determine the air pressure which is imposed on the free surface inside the chamber. The numerical model is well validated against the published experimental data of the free surface elevation at the chamber centre, air pressure inside the chamber and hydrodynamic efficiency. Further, the present model is applied to study the effects of geometrical parameters (including the vertical duct height, vertical duct width and wall thickness) on the hydrodynamic performances of the U-OWC device. The results indicate that geometrical parameters of the vertical duct have significant influence on the air pressure inside the chamber and the hydrodynamic efficiency. The hydrodynamic efficiency and air pressure inside the chamber are found to increase with the increase of both vertical duct height and thickness of wall I. However, the increasing rate of the efficiency slows down gradually with the thickness of wall I increasing, which indicates that a comprehensive consideration of the construction cost and hydrodynamic performance is needed in the design and construction of a U-OWC device.</description><subject>Air</subject><subject>Construction</subject><subject>Efficiency</subject><subject>Free surfaces</subject><subject>Height</subject><subject>HOBEM</subject><subject>Hydrodynamic efficiency</subject><subject>Hydrodynamics</subject><subject>Mathematical models</subject><subject>Nonlinear wave interactions</subject><subject>Nonlinear waves</subject><subject>Nonlinearity</subject><subject>Parameters</subject><subject>Pressure</subject><subject>U-OWC</subject><subject>Water column</subject><subject>Wave energy</subject><subject>Wave power</subject><issn>0141-1187</issn><issn>1879-1549</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp9UMFOwzAMjRBIjMEPcIrEuSNuk6aTuKAJBtIkDrBzlKbuSNU1JemK-HtSlTMny8_v2c-PkFtgK2CQ3zcr3Tu_Slk6ASkwcUYWUMh1AoKvz8mCAYcEInJJrkJoGIO0yIsFed-iO-LgrdEttd2IYbAHPVjXUVdTTfdJ-NQ9VtQFY9s2TroD_dYDempcezp2sRmRYof-8EMrHK3Ba3JR6zbgzV9dkv3z08fmJdm9bV83j7vEZDIdkqIQ67rOwXCuMyllIUuOWJbIhJTaCDRcy1oAFlmem5xXsjSSiQrQ1CXTOluSu3lv793XKTpXjTv5Lp5UKedZDjxbi8hKZ5bxLgSPteq9PWr_o4CpKTzVqCk8NYWn5vCi6GEWYfQ_WvQqvo-dwcp6NIOqnP1P_gtG-3j8</recordid><startdate>202004</startdate><enddate>202004</enddate><creator>Ning, De-zhi</creator><creator>Guo, Bao-ming</creator><creator>Wang, Rong-quan</creator><creator>Vyzikas, Thomas</creator><creator>Greaves, Deborah</creator><general>Elsevier Ltd</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TN</scope><scope>F1W</scope></search><sort><creationdate>202004</creationdate><title>Geometrical investigation of a U-shaped oscillating water column wave energy device</title><author>Ning, De-zhi ; Guo, Bao-ming ; Wang, Rong-quan ; Vyzikas, Thomas ; Greaves, Deborah</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c372t-8859ff61c44a377787b4eebbe0577ac5ec4a7f51e8366c64d7bc705d1ecfb0aa3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Air</topic><topic>Construction</topic><topic>Efficiency</topic><topic>Free surfaces</topic><topic>Height</topic><topic>HOBEM</topic><topic>Hydrodynamic efficiency</topic><topic>Hydrodynamics</topic><topic>Mathematical models</topic><topic>Nonlinear wave interactions</topic><topic>Nonlinear waves</topic><topic>Nonlinearity</topic><topic>Parameters</topic><topic>Pressure</topic><topic>U-OWC</topic><topic>Water column</topic><topic>Wave energy</topic><topic>Wave power</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ning, De-zhi</creatorcontrib><creatorcontrib>Guo, Bao-ming</creatorcontrib><creatorcontrib>Wang, Rong-quan</creatorcontrib><creatorcontrib>Vyzikas, Thomas</creatorcontrib><creatorcontrib>Greaves, Deborah</creatorcontrib><collection>CrossRef</collection><collection>Oceanic Abstracts</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><jtitle>Applied ocean research</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ning, De-zhi</au><au>Guo, Bao-ming</au><au>Wang, Rong-quan</au><au>Vyzikas, Thomas</au><au>Greaves, Deborah</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Geometrical investigation of a U-shaped oscillating water column wave energy device</atitle><jtitle>Applied ocean research</jtitle><date>2020-04</date><risdate>2020</risdate><volume>97</volume><spage>102105</spage><epage>10</epage><pages>102105-10</pages><artnum>102105</artnum><issn>0141-1187</issn><eissn>1879-1549</eissn><abstract>•The hydrodynamics of a U-OWC device is numerically investigated.•The effect of geometric parameters on the hydrodynamic performance are discussed.•The larger vertical duct height, the higher hydrodynamic efficiency.•The hydrodynamic efficiency increases with the vertical duct width in some extent.•The hydrodynamic efficiency increases with the front wall thickness of the vertical duct.
Hydrodynamic performance of a fixed U-shaped oscillating water column (U-OWC) wave energy converter is numerically investigated. Based on the time-domain higher-order boundary element method (HOBEM), a two-dimensional fully nonlinear numerical model is implemented to simulate the nonlinear wave interaction with a U-OWC device. In the model, the inner-domain-source method is adopted to generate incident waves and a linear pneumatic model is used to determine the air pressure which is imposed on the free surface inside the chamber. The numerical model is well validated against the published experimental data of the free surface elevation at the chamber centre, air pressure inside the chamber and hydrodynamic efficiency. Further, the present model is applied to study the effects of geometrical parameters (including the vertical duct height, vertical duct width and wall thickness) on the hydrodynamic performances of the U-OWC device. The results indicate that geometrical parameters of the vertical duct have significant influence on the air pressure inside the chamber and the hydrodynamic efficiency. The hydrodynamic efficiency and air pressure inside the chamber are found to increase with the increase of both vertical duct height and thickness of wall I. However, the increasing rate of the efficiency slows down gradually with the thickness of wall I increasing, which indicates that a comprehensive consideration of the construction cost and hydrodynamic performance is needed in the design and construction of a U-OWC device.</abstract><cop>Barking</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.apor.2020.102105</doi><tpages>10</tpages><oa>free_for_read</oa></addata></record> |
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| language | eng |
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| source | Elsevier |
| subjects | Air Construction Efficiency Free surfaces Height HOBEM Hydrodynamic efficiency Hydrodynamics Mathematical models Nonlinear wave interactions Nonlinear waves Nonlinearity Parameters Pressure U-OWC Water column Wave energy Wave power |
| title | Geometrical investigation of a U-shaped oscillating water column wave energy device |
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