Results 231 to 240 of about 3,909,091 (274)

Passive flow control of a Francis turbine operating in sand-laden rivers for mitigating sediment erosion

The Physics of Fluids
In a typical Francis turbine operating in sand-laden rivers, owing to its complicated geometry and variable operating conditions, vortex structures appear and cause severe erosion damage to turbine components.
Zilong Zhao, Zhiwei Guo, Z. Qian
semanticscholar   +1 more source

Erosion assessment and anti-erosion optimization design for Francis turbine

The Physics of Fluids
Sediment erosion poses a significant challenge for hydraulic turbines in sediment-laden rivers. This paper investigates the erosion patterns in high-head Francis turbines using numerical simulations. It analyzes how sediment concentration, particle size,
Longgang Sun, Qian Zhang, Dongdong An, Zhuofei Xu, Shuaihui Sun, Pengcheng Guo   +5 more
semanticscholar   +1 more source

Die Francis-Turbine

1908
132. Saugrohr. Die Francis-Turbine eignet sich besser als irgend eine andere Form fur den Anschlus eines Saugrohres. Wohl kann sie so gut wie irgend eine andere auch ohne Saugrohr arbeiten; allein da sich dessen Anwendung fast von selbst ergibt, bildet sie die Regel.
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Flow Investigation in a Francis Turbine

Journal of Basic Engineering, 1971
Results of both theoretical and experimental investigations of the flow in a Francis water turbine are presented. The flow visualization with the aid of rotating five-borehole probes provides the relative velocities, the pressure and energy distribution, the slip factor, the boundary layers, and the secondary flow.
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Unsteady operation of the Francis turbine

2007
Increasing interconnection of individual power systems into major grids has imposed more stringent quality assurance requirements on the modelling of hydroelectric generating plant. This has provided the impetus for the present study in which existing industry models used to predict the transient behaviour of the Francis-turbine plants are reviewed ...
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Berechnung der Francis-Turbine

1922
Beispiel: Es ist eine Francis-Turbine nach Bauart Fig. 75 mit senkrechter Welle zu entwerfen fur eine mittlere Wassermenge von Q = 2 cbm pro Sekunde und ein nutzbares Gefalle von H = 8 m.
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Validation of a Stage Calculation in a Francis Turbine

1996
This paper describes the verification of a simulation method for complete hydraulic turbine systems, from spiral casing through distributor and runner to the outlet draft tube. The method solves the steady 3D Reynolds-averaged Navier Stokes equations with a mixing plane at the interfaces between the components, so that the flow in each frame of ...
Mirjam Sick, Michael V. Casey, Paul F. Galpin   +2 more
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Establishment of correlation for the pressure fluctuations on the low-head Francis turbine in the draft tube cone from the model test

Flow Measurement and Instrumentation, 2023
Nitin Kumar Jhankal, Arun Kumar, Mukesh Mangla   +2 more
semanticscholar   +1 more source

Design and verification of Francis turbine working in sand laden hydro-power plant

Renewable Energy, 2023
Jing yang, Chong Peng, Chang-jun Li, Xinjun Liu, Jian Liu, Zhengwei Wang   +5 more
semanticscholar   +1 more source

Effect of guide vane profile on the hydraulic performance of moderate low-specific-speed Francis turbine

Journal of Mechanical Science and Technology, 2023
Xiaoming Chen, X. Lai, Q. Gou, Dongmei Song   +3 more
semanticscholar   +1 more source