Study on an Axial Flow Hydraulic Turbine with Collection Device
We propose a new type of portable hydraulic turbine that uses the kinetic energy of flow in open channels. The turbine comprises a runner with an appended collection device that includes a diffuser section in an attempt to improve the output by catching and accelerating the flow. With such turbines,...
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | International Journal of Rotating Machinery |
| Online Access: | http://dx.doi.org/10.1155/2014/308058 |
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| _version_ | 1832565083085996032 |
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| author | Yasuyuki Nishi Terumi Inagaki Kaoru Okubo Norio Kikuchi |
| author_facet | Yasuyuki Nishi Terumi Inagaki Kaoru Okubo Norio Kikuchi |
| author_sort | Yasuyuki Nishi |
| collection | DOAJ |
| description | We propose a new type of portable hydraulic turbine that uses the kinetic energy of flow in open channels. The turbine comprises a runner with an appended collection device that includes a diffuser section in an attempt to improve the output by catching and accelerating the flow. With such turbines, the performance of the collection device, and a composite body comprising the runner and collection device were studied using numerical analysis. Among four stand-alone collection devices, the inlet velocity ratio was most improved by the collection device featuring an inlet nozzle and brim. The inlet velocity ratio of the composite body was significantly lower than that of the stand-alone collection device, owing to the resistance of the runner itself, the decreased diffuser pressure recovery coefficient, and the increased backpressure coefficient. However, at the maximum output tip speed ratio, the inlet velocity ratio and the loading coefficient were approximately 31% and 22% higher, respectively, for the composite body than for the isolated runner. In particular, the input power coefficient significantly increased (by approximately 2.76 times) owing to the increase in the inlet velocity ratio. Verification tests were also conducted in a real canal to establish the actual effectiveness of the turbine. |
| format | Article |
| id | doaj-art-29dbc56e977042adad34510ed60b1728 |
| institution | Kabale University |
| issn | 1023-621X 1542-3034 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Rotating Machinery |
| spelling | doaj-art-29dbc56e977042adad34510ed60b17282025-02-03T01:09:25ZengWileyInternational Journal of Rotating Machinery1023-621X1542-30342014-01-01201410.1155/2014/308058308058Study on an Axial Flow Hydraulic Turbine with Collection DeviceYasuyuki Nishi0Terumi Inagaki1Kaoru Okubo2Norio Kikuchi3Department of Mechanical Engineering, Ibaraki University, 4-12-1 Nakanarusawa-cho, Hitachi-shi, Ibaraki 316-8511, JapanDepartment of Mechanical Engineering, Ibaraki University, 4-12-1 Nakanarusawa-cho, Hitachi-shi, Ibaraki 316-8511, JapanGraduate School of Science and Engineering, Ibaraki University, 4-12-1 Nakanarusawa-cho, Hitachi-shi, Ibaraki 316-8511, JapanIbasei, Ltd., 4-7-10 Kamine-cho, Hitachi-shi, Ibaraki 317-0064, JapanWe propose a new type of portable hydraulic turbine that uses the kinetic energy of flow in open channels. The turbine comprises a runner with an appended collection device that includes a diffuser section in an attempt to improve the output by catching and accelerating the flow. With such turbines, the performance of the collection device, and a composite body comprising the runner and collection device were studied using numerical analysis. Among four stand-alone collection devices, the inlet velocity ratio was most improved by the collection device featuring an inlet nozzle and brim. The inlet velocity ratio of the composite body was significantly lower than that of the stand-alone collection device, owing to the resistance of the runner itself, the decreased diffuser pressure recovery coefficient, and the increased backpressure coefficient. However, at the maximum output tip speed ratio, the inlet velocity ratio and the loading coefficient were approximately 31% and 22% higher, respectively, for the composite body than for the isolated runner. In particular, the input power coefficient significantly increased (by approximately 2.76 times) owing to the increase in the inlet velocity ratio. Verification tests were also conducted in a real canal to establish the actual effectiveness of the turbine.http://dx.doi.org/10.1155/2014/308058 |
| spellingShingle | Yasuyuki Nishi Terumi Inagaki Kaoru Okubo Norio Kikuchi Study on an Axial Flow Hydraulic Turbine with Collection Device International Journal of Rotating Machinery |
| title | Study on an Axial Flow Hydraulic Turbine with Collection Device |
| title_full | Study on an Axial Flow Hydraulic Turbine with Collection Device |
| title_fullStr | Study on an Axial Flow Hydraulic Turbine with Collection Device |
| title_full_unstemmed | Study on an Axial Flow Hydraulic Turbine with Collection Device |
| title_short | Study on an Axial Flow Hydraulic Turbine with Collection Device |
| title_sort | study on an axial flow hydraulic turbine with collection device |
| url | http://dx.doi.org/10.1155/2014/308058 |
| work_keys_str_mv | AT yasuyukinishi studyonanaxialflowhydraulicturbinewithcollectiondevice AT terumiinagaki studyonanaxialflowhydraulicturbinewithcollectiondevice AT kaoruokubo studyonanaxialflowhydraulicturbinewithcollectiondevice AT noriokikuchi studyonanaxialflowhydraulicturbinewithcollectiondevice |