Field test and CFD of performance of undershot water wheel in snow drainageway
The present paper describes the performance of a micro undershot water wheel for the power generation in a snow drainageway with the Froude number of 2 to 3. In order to optimize the installation conditions of the undershot water wheel and its arc blade, the effects of blade inlet angle β and the su...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | Japanese |
| Published: |
The Japan Society of Mechanical Engineers
2020-06-01
|
| Series: | Nihon Kikai Gakkai ronbunshu |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/transjsme/86/887/86_20-00132/_pdf/-char/en |
| _version_ | 1797989087188090880 |
|---|---|
| author | Yoshitaka KIKUCHI Takahiro KIWATA Takaaki KONO |
| author_facet | Yoshitaka KIKUCHI Takahiro KIWATA Takaaki KONO |
| author_sort | Yoshitaka KIKUCHI |
| collection | DOAJ |
| description | The present paper describes the performance of a micro undershot water wheel for the power generation in a snow drainageway with the Froude number of 2 to 3. In order to optimize the installation conditions of the undershot water wheel and its arc blade, the effects of blade inlet angle β and the submerged blade height hc on the performance of the undershot micro water wheel has been investigated by field test at Shiramine district in Ishikawa Prefecture. Furthermore, two-dimensional computational fluid dynamics (CFD) has been performed using ANSYS Fluent to be shown clearly the flow of inside and outside of the undershot water wheel and its power. The water wheel has a diameter of D = 600 mm and a width of W = 410 mm. In the snow drainageway, the Froude number is Fr = 2.15 to 2.42. The CFD result of the change of the maximum power coefficient CPmax with the blade inlet angle of β agrees with the experimental one qualitatively. In the case of the submerged blade height hc/D = 0.10, the blade inlet angle β has little influence on the power coefficient CP. In the case of hc/D = 0.20 and 0.29, the peak value of the maximum power coefficient is CPmax = 0.37 and 0.27 at β = 18° and 24°, respectively. The relation between the flow in the water wheel and the generation of torque has been clarified by CFD. The negative torque generates at the rotation angle of water wheel θ = 0 ~ 40° because the separated flow from the tip of blade collides against the back of the blade. The positive torque generates at θ = 45 ~ 110° to apply the drag force by the main flow. The positive torque also generates by the water flow passing through the blades for θ = 135 ~ 210°. |
| first_indexed | 2024-04-11T08:14:40Z |
| format | Article |
| id | doaj.art-429a4f8b59cf42ef9219fa859d050163 |
| institution | Directory Open Access Journal |
| issn | 2187-9761 |
| language | Japanese |
| last_indexed | 2024-04-11T08:14:40Z |
| publishDate | 2020-06-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Nihon Kikai Gakkai ronbunshu |
| spelling | doaj.art-429a4f8b59cf42ef9219fa859d0501632022-12-22T04:35:12ZjpnThe Japan Society of Mechanical EngineersNihon Kikai Gakkai ronbunshu2187-97612020-06-018688720-0013220-0013210.1299/transjsme.20-00132transjsmeField test and CFD of performance of undershot water wheel in snow drainagewayYoshitaka KIKUCHI0Takahiro KIWATA1Takaaki KONO2Graduate School of Natural Science and Technology, Kanazawa UniversitySchool of Mechanical Engineering, Kanazawa UniversitySchool of Mechanical Engineering, Kanazawa UniversityThe present paper describes the performance of a micro undershot water wheel for the power generation in a snow drainageway with the Froude number of 2 to 3. In order to optimize the installation conditions of the undershot water wheel and its arc blade, the effects of blade inlet angle β and the submerged blade height hc on the performance of the undershot micro water wheel has been investigated by field test at Shiramine district in Ishikawa Prefecture. Furthermore, two-dimensional computational fluid dynamics (CFD) has been performed using ANSYS Fluent to be shown clearly the flow of inside and outside of the undershot water wheel and its power. The water wheel has a diameter of D = 600 mm and a width of W = 410 mm. In the snow drainageway, the Froude number is Fr = 2.15 to 2.42. The CFD result of the change of the maximum power coefficient CPmax with the blade inlet angle of β agrees with the experimental one qualitatively. In the case of the submerged blade height hc/D = 0.10, the blade inlet angle β has little influence on the power coefficient CP. In the case of hc/D = 0.20 and 0.29, the peak value of the maximum power coefficient is CPmax = 0.37 and 0.27 at β = 18° and 24°, respectively. The relation between the flow in the water wheel and the generation of torque has been clarified by CFD. The negative torque generates at the rotation angle of water wheel θ = 0 ~ 40° because the separated flow from the tip of blade collides against the back of the blade. The positive torque generates at θ = 45 ~ 110° to apply the drag force by the main flow. The positive torque also generates by the water flow passing through the blades for θ = 135 ~ 210°.https://www.jstage.jst.go.jp/article/transjsme/86/887/86_20-00132/_pdf/-char/enwater turbineundershot water wheelhydroelectric power generationsnow drainagewayfield testcomputational fluid dynamicsfree surface flowarc blade |
| spellingShingle | Yoshitaka KIKUCHI Takahiro KIWATA Takaaki KONO Field test and CFD of performance of undershot water wheel in snow drainageway Nihon Kikai Gakkai ronbunshu water turbine undershot water wheel hydroelectric power generation snow drainageway field test computational fluid dynamics free surface flow arc blade |
| title | Field test and CFD of performance of undershot water wheel in snow drainageway |
| title_full | Field test and CFD of performance of undershot water wheel in snow drainageway |
| title_fullStr | Field test and CFD of performance of undershot water wheel in snow drainageway |
| title_full_unstemmed | Field test and CFD of performance of undershot water wheel in snow drainageway |
| title_short | Field test and CFD of performance of undershot water wheel in snow drainageway |
| title_sort | field test and cfd of performance of undershot water wheel in snow drainageway |
| topic | water turbine undershot water wheel hydroelectric power generation snow drainageway field test computational fluid dynamics free surface flow arc blade |
| url | https://www.jstage.jst.go.jp/article/transjsme/86/887/86_20-00132/_pdf/-char/en |
| work_keys_str_mv | AT yoshitakakikuchi fieldtestandcfdofperformanceofundershotwaterwheelinsnowdrainageway AT takahirokiwata fieldtestandcfdofperformanceofundershotwaterwheelinsnowdrainageway AT takaakikono fieldtestandcfdofperformanceofundershotwaterwheelinsnowdrainageway |