Improving the Efficiency of a Hydro-Turbine System by Vortex Generators

Pan, Hua Chen; Hong, Shu Li

doi:10.4028/www.scientific.net/amr.354-355.636

Cited by 2 publications

(2 citation statements)

References 4 publications

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“…This modeling technology allows developers to design better prototypes and establish alterations to achieve higher-performing models, decreasing the need for onsite testing. CFD is able to significantly increase the turbine efficiency and the draft recovery factor using a vortex generator in the draft tube, while studies on draft tube flow pattern prediction are lacking [217][218][219]. More detailed studies using the CFD method should aim to improve the overall efficiency of blade contour tuning, to reduce tip leakage, refine the coarseness and friction in the surface area, and reduce water leakage and hammer effect.…”

Section: State-of-the-art Assessment and Evaluationmentioning

confidence: 99%

State-of-the Art-Powerhouse, Dam Structure, and Turbine Operation and Vibrations

Yaseen‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬

Ameen

Aldlemy

et al. 2020

Sustainability

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Dam and powerhouse operation sustainability is a major concern from the hydraulic engineering perspective. Powerhouse operation is one of the main sources of vibrations in the dam structure and hydropower plant; thus, the evaluation of turbine performance at different water pressures is important for determining the sustainability of the dam body. Draft tube turbines run under high pressure and suffer from connection problems, such as vibrations and pressure fluctuation. Reducing the pressure fluctuation and minimizing the principal stress caused by undesired components of water in the draft tube turbine are ongoing problems that must be resolved. Here, we conducted a comprehensive review of studies performed on dams, powerhouses, and turbine vibration, focusing on the vibration of two turbine units: Kaplan and Francis turbine units. The survey covered several aspects of dam types (e.g., rock and concrete dams), powerhouse analysis, turbine vibrations, and the relationship between dam and hydropower plant sustainability and operation. The current review covers the related research on the fluid mechanism in turbine units of hydropower plants, providing a perspective on better control of vibrations. Thus, the risks and failures can be better managed and reduced, which in turn will reduce hydropower plant operation costs and simultaneously increase the economical sustainability. Several research gaps were found, and the literature was assessed to provide more insightful details on the studies surveyed. Numerous future research directions are recommended.

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Section: State-of-the-art Assessment and Evaluationmentioning

confidence: 99%

State-of-the Art-Powerhouse, Dam Structure, and Turbine Operation and Vibrations

Yaseen‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬‬

Ameen

Aldlemy

et al. 2020

Sustainability

View full text Add to dashboard Cite

show abstract

“…After few years' effort, the prediction of the pressure recovery with the CFD approach seems reliable under clean and precise modeling only. Pan [48] simulated a hydro-turbine system provided by Waterpumps Oy, Finland. With the CFD method, they found the turbine system efficiency is increased by 1.5% and the draft tube pressure recovery factor is increased by 4.03%, by introducing Vortex Generators into the draft tube.…”

Section: Improving Pressure Recovery In Draft Tubementioning

confidence: 99%