Ole Gunnar Dahlhaug

TL;DR: In this article, a complete Hill diagram was constructed and pressure-time measurements were performed at several operating conditions over the entire range of power generation by installing pressure sensors in the rotating and stationary domains of the turbine.

TL;DR: In this paper, a case study of 22MW Chilime hydropower plant in Nepal was conducted and erosion analysis was carried out in this case study Sieve and mineral content analyses were systematically carried out and sediment load was calculated by using flow net diagrams.

TL;DR: In this article, an improved empirical relation to estimate the sediment erosion in Francis runner has been proposed, which can help to formulate appropriate design, operation and maintenance strategy for Francis runner at a specific site conditions.

TL;DR: In this article, a scale model of a Francis turbine prototype (specific speed = 0.27) during an emergency shutdown with a transition into total load rejection was used to investigate the effect of high-amplitude, unsteady pressure on the turbine runner.

TL;DR: In this article, the effects of sediment erosion of turbine components on the flow phenomenon are investigated. But the exact phenomenon of erosion of surface by the solid particles has not been fully understood, despite of centuries of investigations and research, despite the increasing number of hydropower plants are being built in the regions where rivers are heavily loaded with sediment.