Suitable and accurate flow measurement in pumped storage hydropower plants (PSP) is a challenging task due to the entirely different hydraulic behaviour of penstock. This study presents novel approach choosing suitable method position. The focus on specific short penstock largest peak-load plant, Orlík, after its transformation PSP. Our based three main pillars: numerical modelling fluid (ANSYS...

In the present study, a reduced model of Francis-99 turbine was investigated numerically at part load operating condition. The consists standalone draft tube domain turbine. Numerical studies performed in past on nearly complete hydro-turbine models (inclusive spiral casing, distributor domains, runner, and tube) reportedly consist large number computational grids. This may increase costs data ...

Francis turbines can experience critical instabilities at high load operating points, limiting their maximum power output. The swirling flow developed in the draft tube produces a cavitating axisymmetric volume, acting as an internal energy source leading to a self-excited surge phenomenon. The pulsation of the vortex rope corresponds to one of the eigenfrequencies of the hydraulic system. Effo...

In the present study, numerical investigations of a Francis turbine at model scale are performed. A part load operating point is selected for the analysis with a focus on the cavitating draft tube vortex rope. For three σ-levels, different aspects are investigated. First, the extension of the vapor volume is analyzed and compared to high-speed visualization recordings from the measurements. Fur...

This paper presents the software package developed at Fluid and Power Research Institute (FPRI) for the uid mechanical design of the wicket gates and the runner blades of the Potential Flow turbine [1]. This software package is based on the correct formulation of the design problem. The design problem can not be correctly formulated for Francis and Kaplan turbines with conventional wicket gates...

The installation of new and revitalization existing hydropower requires the optimal design hydraulic turbine parts, which were previously mostly based on simplified analytical methods engineering practices. With increase in computational power, optimization now present an effective approach to improvement geometry thus enabling fine geometry-tuning adjustments site specifics. However, despite c...

Wear of runner blades is a common problem affecting the operational reliability turbines with high head and sediment content. In order to accurately predict wear turbine blade, based on solid-liquid two-phase flow equation turbulence model, full channel numerical simulation internal water was carried out, volume distribution sand velocity blade were obtained. Then, according digital results ope...