Study on an Undershot Cross-Flow Water Turbine with Straight Blades
Small-scale hydroelectric power generation has recently attracted considerable attention. The authors previously proposed an undershot cross-flow water turbine with a very low head suitable for application to open channels. The water turbine was of a cross-flow type and could be used in open channel...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | International Journal of Rotating Machinery |
| Online Access: | http://dx.doi.org/10.1155/2015/817926 |
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| _version_ | 1832547573445951488 |
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| author | Yasuyuki Nishi Terumi Inagaki Yanrong Li Kentaro Hatano |
| author_facet | Yasuyuki Nishi Terumi Inagaki Yanrong Li Kentaro Hatano |
| author_sort | Yasuyuki Nishi |
| collection | DOAJ |
| description | Small-scale hydroelectric power generation has recently attracted considerable attention. The authors previously proposed an undershot cross-flow water turbine with a very low head suitable for application to open channels. The water turbine was of a cross-flow type and could be used in open channels with the undershot method, remarkably simplifying its design by eliminating guide vanes and the casing. The water turbine was fitted with curved blades (such as the runners of a typical cross-flow water turbine) installed in tube channels. However, there was ambiguity as to how the blades’ shape influenced the turbine’s performance and flow field. To resolve this issue, the present study applies straight blades to an undershot cross-flow water turbine and examines the performance and flow field via experiments and numerical analyses. Results reveal that the output power and the turbine efficiency of the Straight Blades runner were greater than those of the Curved Blades runner regardless of the rotational speed. Compared with the Curved Blades runner, the output power and the turbine efficiency of the Straight Blades runner were improved by about 31.7% and about 67.1%, respectively. |
| format | Article |
| id | doaj-art-5e76cd28ac9f418ebf978eee4137c04d |
| institution | Kabale University |
| issn | 1023-621X 1542-3034 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Rotating Machinery |
| spelling | doaj-art-5e76cd28ac9f418ebf978eee4137c04d2025-02-03T06:44:22ZengWileyInternational Journal of Rotating Machinery1023-621X1542-30342015-01-01201510.1155/2015/817926817926Study on an Undershot Cross-Flow Water Turbine with Straight BladesYasuyuki Nishi0Terumi Inagaki1Yanrong Li2Kentaro Hatano3Department 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, 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, JapanSmall-scale hydroelectric power generation has recently attracted considerable attention. The authors previously proposed an undershot cross-flow water turbine with a very low head suitable for application to open channels. The water turbine was of a cross-flow type and could be used in open channels with the undershot method, remarkably simplifying its design by eliminating guide vanes and the casing. The water turbine was fitted with curved blades (such as the runners of a typical cross-flow water turbine) installed in tube channels. However, there was ambiguity as to how the blades’ shape influenced the turbine’s performance and flow field. To resolve this issue, the present study applies straight blades to an undershot cross-flow water turbine and examines the performance and flow field via experiments and numerical analyses. Results reveal that the output power and the turbine efficiency of the Straight Blades runner were greater than those of the Curved Blades runner regardless of the rotational speed. Compared with the Curved Blades runner, the output power and the turbine efficiency of the Straight Blades runner were improved by about 31.7% and about 67.1%, respectively.http://dx.doi.org/10.1155/2015/817926 |
| spellingShingle | Yasuyuki Nishi Terumi Inagaki Yanrong Li Kentaro Hatano Study on an Undershot Cross-Flow Water Turbine with Straight Blades International Journal of Rotating Machinery |
| title | Study on an Undershot Cross-Flow Water Turbine with Straight Blades |
| title_full | Study on an Undershot Cross-Flow Water Turbine with Straight Blades |
| title_fullStr | Study on an Undershot Cross-Flow Water Turbine with Straight Blades |
| title_full_unstemmed | Study on an Undershot Cross-Flow Water Turbine with Straight Blades |
| title_short | Study on an Undershot Cross-Flow Water Turbine with Straight Blades |
| title_sort | study on an undershot cross flow water turbine with straight blades |
| url | http://dx.doi.org/10.1155/2015/817926 |
| work_keys_str_mv | AT yasuyukinishi studyonanundershotcrossflowwaterturbinewithstraightblades AT terumiinagaki studyonanundershotcrossflowwaterturbinewithstraightblades AT yanrongli studyonanundershotcrossflowwaterturbinewithstraightblades AT kentarohatano studyonanundershotcrossflowwaterturbinewithstraightblades |