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| Analysis of effect of blades angle on hydraulic performance for pumping system of water diversion pumping station |
| SHI Wei1,2*, CHENG Li3 |
| 1. The Eastern Route of South-to-North Water Diversion Project Jiangsu Water Source Co. Ltd., Nanjing, Jiangsu 210019, China; 2. Jiangsu Engineering and Technology Center for Pumping Station, Nanjing, Jiangsu 210019, China; 3. School of Hydraulic Science & Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China |
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Abstract In order to investigate the effect of blades angle on the hydraulic performance for the pumping system of water diversion pumping station, the pumping system with the whole flow passage was simulated by computational fluid dynamics technology. The effect of changing blade angles on flow pattern and hydraulic performance of inlet passage, outlet passage and impeller was analyzed based on the simulation result. The result indicates that the recirculation is found at the area near hub while the blade angle deviates design values. The flow pattern of flow passage becomes bad and hydraulic loss of flow passage increases while the deviation angle increases.When the blade angle is adjusted to -8°, the relative value of hydraulic loss of the inlet and outlet passages is the largest, which is 1.28 and 2.89 respectively(compared with the blade angle -0° condition). At the same deviation angle, the relative value of hydraulic loss of outlet passage is larger than that of inlet passage. The simulation result of design condition was compared with the test result, which shows that the relative uncertain value of head is 1.2% and the relative uncertain value of effectiveness is 2.1%. It means that the simulation result has good agreement with the test result. The research results can could provide reference for the operation management of water diversion pumping station.
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Received: 22 August 2019
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