A study of diffuser angle effect on ducted water current turbine performance using CFD
The water current has used as the energy resource for long time however its velocity is very low therefore there arenot found in wide range of uses. This study purposes accelerate water velocity by installing diffuser. The problems wereanalyzed by one dimension analysis and computational fluid dynam...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Prince of Songkla University
2012-02-01
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| Series: | Songklanakarin Journal of Science and Technology (SJST) |
| Subjects: | |
| Online Access: | http://rdo.psu.ac.th/sjstweb/journal/34-1/0125-3395-34-1-61-67.pdf |
| _version_ | 1818151302978338816 |
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| author | Adun Janyalertadun Palapum Khunthongjan |
| author_facet | Adun Janyalertadun Palapum Khunthongjan |
| author_sort | Adun Janyalertadun |
| collection | DOAJ |
| description | The water current has used as the energy resource for long time however its velocity is very low therefore there arenot found in wide range of uses. This study purposes accelerate water velocity by installing diffuser. The problems wereanalyzed by one dimension analysis and computational fluid dynamics (CFD); the domain covers the diffuser and turbinewhich substituted by porous jump condition is install inside. The flow was identified as axisymmetric steady flow, the inletboundary is identified as uniform flow, all simulation use the same size of diffuser, only the diffuser angles are vary. The resultsshow that velocities of water current in diffuser are increase when the diffuser angle are widen. The angle of diffuser is 20°,the velocity is increase to 1.96 times, compared to free stream velocity. If the angle was about 0-20° and 50-70° the forcetoward diffuser became high instantly; where as the force toward the rotor will be still and the maximum rate of diffuseraugmentation possibly was 3.62 and rotor power coefficient was 2.14. |
| first_indexed | 2024-12-11T13:36:40Z |
| format | Article |
| id | doaj.art-af21da8ccf264be583c17b911561f07e |
| institution | Directory Open Access Journal |
| issn | 0125-3395 |
| language | English |
| last_indexed | 2024-12-11T13:36:40Z |
| publishDate | 2012-02-01 |
| publisher | Prince of Songkla University |
| record_format | Article |
| series | Songklanakarin Journal of Science and Technology (SJST) |
| spelling | doaj.art-af21da8ccf264be583c17b911561f07e2022-12-22T01:05:00ZengPrince of Songkla UniversitySongklanakarin Journal of Science and Technology (SJST)0125-33952012-02-013416167A study of diffuser angle effect on ducted water current turbine performance using CFDAdun JanyalertadunPalapum KhunthongjanThe water current has used as the energy resource for long time however its velocity is very low therefore there arenot found in wide range of uses. This study purposes accelerate water velocity by installing diffuser. The problems wereanalyzed by one dimension analysis and computational fluid dynamics (CFD); the domain covers the diffuser and turbinewhich substituted by porous jump condition is install inside. The flow was identified as axisymmetric steady flow, the inletboundary is identified as uniform flow, all simulation use the same size of diffuser, only the diffuser angles are vary. The resultsshow that velocities of water current in diffuser are increase when the diffuser angle are widen. The angle of diffuser is 20°,the velocity is increase to 1.96 times, compared to free stream velocity. If the angle was about 0-20° and 50-70° the forcetoward diffuser became high instantly; where as the force toward the rotor will be still and the maximum rate of diffuseraugmentation possibly was 3.62 and rotor power coefficient was 2.14.http://rdo.psu.ac.th/sjstweb/journal/34-1/0125-3395-34-1-61-67.pdfwater current turbinediffusercomputational fluid dynamicspower augmentationducted water turbine |
| spellingShingle | Adun Janyalertadun Palapum Khunthongjan A study of diffuser angle effect on ducted water current turbine performance using CFD Songklanakarin Journal of Science and Technology (SJST) water current turbine diffuser computational fluid dynamics power augmentation ducted water turbine |
| title | A study of diffuser angle effect on ducted water current turbine performance using CFD |
| title_full | A study of diffuser angle effect on ducted water current turbine performance using CFD |
| title_fullStr | A study of diffuser angle effect on ducted water current turbine performance using CFD |
| title_full_unstemmed | A study of diffuser angle effect on ducted water current turbine performance using CFD |
| title_short | A study of diffuser angle effect on ducted water current turbine performance using CFD |
| title_sort | study of diffuser angle effect on ducted water current turbine performance using cfd |
| topic | water current turbine diffuser computational fluid dynamics power augmentation ducted water turbine |
| url | http://rdo.psu.ac.th/sjstweb/journal/34-1/0125-3395-34-1-61-67.pdf |
| work_keys_str_mv | AT adunjanyalertadun astudyofdiffuserangleeffectonductedwatercurrentturbineperformanceusingcfd AT palapumkhunthongjan astudyofdiffuserangleeffectonductedwatercurrentturbineperformanceusingcfd AT adunjanyalertadun studyofdiffuserangleeffectonductedwatercurrentturbineperformanceusingcfd AT palapumkhunthongjan studyofdiffuserangleeffectonductedwatercurrentturbineperformanceusingcfd |