Experimental Study of the Francis Turbine Pressure Fluctuations and the Pressure Fluctuations Superposition Phenomenon Inside the RunnerSource: Journal of Fluids Engineering:;2018:;volume( 140 ):;issue: 004::page 41208Author:Gao, Zhongxin
,
Zhu, Wenruo
,
Meng, Long
,
Zhang, Jianguang
,
Zhang, Fei
,
Pan, Luoping
,
Lu, Li
DOI: 10.1115/1.4038535Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The pressure fluctuations in both the rotating runner and the other fixed components in a model Francis turbine under various loads were experimentally measured by means of onboard measuring equipment in the runner and data storage device on the shaft in this study. Large pressure fluctuations were observed under both small guide vane opening and large guide vane opening conditions. Flow separation at the blade suction surface led to large pressure fluctuations for small guide vane openings, the unsteady flow around the inlet on the blade pressure side led to large pressure fluctuations for large openings. The pressure fluctuations correlation between the runner and other components of the turbine, mainly the draft tube, was analyzed in detail for both small guide vane opening (12 deg) and large guide vane opening (30 deg). The results show that the pressure fluctuations in the runner space increased by the superposition of draft tube vortex rope pressure fluctuations and runner inter blade vortices pressure fluctuations, resulting in much larger pressure fluctuations in the runner space than in other components.
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| contributor author | Gao, Zhongxin | |
| contributor author | Zhu, Wenruo | |
| contributor author | Meng, Long | |
| contributor author | Zhang, Jianguang | |
| contributor author | Zhang, Fei | |
| contributor author | Pan, Luoping | |
| contributor author | Lu, Li | |
| date accessioned | 2019-02-28T10:59:26Z | |
| date available | 2019-02-28T10:59:26Z | |
| date copyright | 12/21/2017 12:00:00 AM | |
| date issued | 2018 | |
| identifier issn | 0098-2202 | |
| identifier other | fe_140_04_041208.pdf | |
| identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4251485 | |
| description abstract | The pressure fluctuations in both the rotating runner and the other fixed components in a model Francis turbine under various loads were experimentally measured by means of onboard measuring equipment in the runner and data storage device on the shaft in this study. Large pressure fluctuations were observed under both small guide vane opening and large guide vane opening conditions. Flow separation at the blade suction surface led to large pressure fluctuations for small guide vane openings, the unsteady flow around the inlet on the blade pressure side led to large pressure fluctuations for large openings. The pressure fluctuations correlation between the runner and other components of the turbine, mainly the draft tube, was analyzed in detail for both small guide vane opening (12 deg) and large guide vane opening (30 deg). The results show that the pressure fluctuations in the runner space increased by the superposition of draft tube vortex rope pressure fluctuations and runner inter blade vortices pressure fluctuations, resulting in much larger pressure fluctuations in the runner space than in other components. | |
| publisher | The American Society of Mechanical Engineers (ASME) | |
| title | Experimental Study of the Francis Turbine Pressure Fluctuations and the Pressure Fluctuations Superposition Phenomenon Inside the Runner | |
| type | Journal Paper | |
| journal volume | 140 | |
| journal issue | 4 | |
| journal title | Journal of Fluids Engineering | |
| identifier doi | 10.1115/1.4038535 | |
| journal fristpage | 41208 | |
| journal lastpage | 041208-9 | |
| tree | Journal of Fluids Engineering:;2018:;volume( 140 ):;issue: 004 | |
| contenttype | Fulltext |