Minimum pressure coefficient criterion applied in axial-flow hydraulic turbines

Endwall Film-Cooling in Axial Flow Turbines

Sediment Erosion in Hydraulic Turbines

Sediment erosion not only reduces efficiency and life of hydropower turbines but also causes problems in operation and maintenance. Several factors are responsible for this erosion in hydro turbine components. This paper presents the sediment erosion types in hydraulic turbines and their components based upon an extensive literature review and the field observation at Cahua hydropower plant, Pe...

Effects of Large Energetic Vortices on Axial-Flow Hydrokinetic Turbines

Large scale coherent motions around marine and hydrokinetic (MHK) machines can significantly increase the structural loading and affect the overall performance of the machines. Characterization of the approach turbulence and their impact on the instantaneous response of MHK devices is essential for improving their design and performance. This preliminary study investigates the effect of turbule...

Hydraulic Aspects in Design and Operation of Axial-flow Pumps

A method of performance estimation for axial-flow turbines based on losses prediction

The main objective in this paper is creating a method for one-dimensional modeling of multi stage axial flow turbine. The calculation used in this technique is based on common thermodynamics and aerodynamics principles in a mean stream line analyses. In this approach, loss models have to be used to determine the entropy increase across each section in the turbine stage. Finally, the analysis an...