We investigated the impact of repeated runner removal after harvest and row cover during fall on strawberry (Fragaria × ananassa) cvs. Polka Wendy cropping potential in joint project University Helsinki Rural Advisory Services Finland. Field trials were carried out 2017 to 2019 farms Southern Ostrobothnia, Finland, at 62°49′N. The treatment effects crown carbohydrate reserves, flowering, yield ...

The second part of this paper presents results of stress analysis of the whole Francis turbine runner at Derbendikan power station by using the Finite Element Method (FEM). Computations were carried out with appropriate boundary and loading conditions for water pressure obtained from CFD analysis. The analysis focuses on stress distribution in the runner blades. It has been found that the maxim...

The mechanical design of hydraulic turbines is conditioned by the dynamic response of the runner that is usually estimated by a computational model. Nevertheless, the runner has complex boundary conditions that are difficult to include in the computational model. One of these boundary conditions is the water in which the runner is submerged. The effect of the added mass and damping of water can...

Abstract In the hydropower plants exposed to excessive sediment concentration, components of Francis turbines, especially regions Guide Vanes (GVs) and Runner (RVs) are severely eroded. The side-wall clearance between GV runner is present in these turbines separate rotating stationary components. height difference inlet outlet covers, introduced during fabrication or assembly process might play...

Overview In free-surface flows the turbulence in the liquid may be sufficient to disturb the surface to the point of entraining air into the flow. This process is important, for example, in water treatment where air is needed to sustain microorganisms for water purification and in rivers and streams for sustaining a healthy fish population. Air entrainment is typically engineered into spillways...

In this work, the estimation of crack initiation life of a hydraulic Francis turbine runner is presented. The life prediction is based on the local strain approach to predict the initiation life. First, the analysis is carried out in air and in water condition and the runner’s natural frequencies were calculated using the finite element (FE) method. The analysis in air is compared with experime...

Horizontal axis double-runner Francis turbines have great advantages in the development of small hydropower plants, but arrangement double runners aggravates complexity water flow between runners, and mutual influence two cannot be ignored. In order to explore relationship performance internal field investigate pressure pulsation characteristics turbine, steady unsteady numerical analysis full ...

Metabolic Syndrome is a human condition that presents with various metabolic issues such as abnormal distribution of body fat, high blood pressure, and a prothrombotic state, among other problems (Alberti,et al, 2005). This syndrome is a risk factor for visual disorders, such as glaucoma, and is often associated with increased levels of neuroinflammation. Currently, the animal model used to rep...