Yang, S and Fang, T and Punit, S and Zhou, C and Zhao, E and Wang, T (2023) Influence of axial spacing on hydraulic performance of tubular turbine [轴向间距对贯流式水轮机水力性能的影响]. In: Paiguan Jixie Gongcheng Xuebao/Journal of Drainage and Irrigation Machinery Engineering, 41 (4). pp. 338-345.
Full text not available from this repository.Abstract
In order to find a reasonable value for the axial distance between the guide vane and the runner in the tubular turbine, as well as obtaining good hydraulic performance while ensuring its compact structure, the numerical calculation of the full flow field was carried out for the micro-tubular turbine models with axial distance s of 30, 40, 50, 60 and 70 mm between the guide vane and the runner to study the influence of axial spacing on the hydraulic performance of a tubular turbine by combining numerical calculation and experiments. The results show that the water head of the turbine increases with the expansion of the axial distance, and the axial (shaft) power of the hydraulic turbine increases first and then stabilizes with the expansion of the axial distance. Considering various flow conditions, higher efficiency is obtained, and the efficiency of the model reaches the maximum when s = 40 mm. Choosing appropriate axial spacing can improve the pressure distribution and flow pattern on the surface of runner blades. Excessive axial spacing will cause negative impact at the inlet of the runner and result in flow separation. The turbulent kinetic energy at the outlet of the runner decreases with the increase of axial spacing, under optimal working conditions, when the axial spacing is expanded from 30 mm to 70 mm, the hydraulic loss inside the runner gradually increases by 15.6%, while the hydraulic loss in the outlet pipe decreases by 19.7%, and the total hydraulic loss shows an increasing trend. Considering comprehensively, s = 40 mm is selected as the final scheme.
| Item Type: | Journal Article |
|---|---|
| Publication: | Paiguan Jixie Gongcheng Xuebao/Journal of Drainage and Irrigation Machinery Engineering |
| Publisher: | Editorial Department of Journal of Drainage and Irrigation Machinery Engineering |
| Additional Information: | The copyright for this article belongs to the Editorial Department of Journal of Drainage and Irrigation Machinery Engineering |
| Department/Centre: | Division of Mechanical Sciences > Centre for Sustainable Technologies (formerly ASTRA) |
| Date Deposited: | 14 Jul 2023 06:17 |
| Last Modified: | 14 Jul 2023 06:17 |
| URI: | https://eprints.iisc.ac.in/id/eprint/82395 |
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