The transient process accompanied by extreme acceleration in the conical sections of hydraulic systems (e.g., draft tube, diffuser) can induce large cavitation bubbles both at closed ends and bulk liquid. collapses cause severe damage to solid walls. We conduct experiments tubes with different conical-frustum shaped `tube-arrest' method observe generated these two locations. For close end we pr...

The operating conditions in spouted bed regime of uniform beds consisting of different biomass wastes dry and wet have been studied to determine the applicability of conical spouted beds with a draft tube in the drying of biomass wastes. This experimental study has been carried out at room temperature and the effect of the solid humidity on the stability of beds of biomass wastes has been deter...

Abstract Francis turbines operating in off-design conditions are subject to pressure fluctuations resulting from the development of hydrodynamic instabilities draft tube. Depending on nature flow-induced (synchronous or convective), this may induce dynamic stresses runner blades, increasing fatigue and risk crack propagation. This paper proposes identify impact tube flow turbine runners. Measur...

In conventional power plants trash-racks are provided at the intakes to protect the turbines. In pumped storage plants, the draft tube or tailrace must also have trash-racks to protect the units while pumping. Because the loads believed to cause many failures of trash-racks are dynamic in nature, it is important to understand the dynamic characteristics of trash-rack structures in general and a...