Experimental Investigation Of The Effect Of
Solid-mixture On The Cavitation Characteristic
Of A Centrifugal Pump
Author(s)
A. Ladouani & A. Nemdili
Abstract
The purpose of this work is to study the effect of solid-mixture on the cavitation
characteristic of a centrifugal pump. However, pump tests under varied
volumetric concentrations of sandy clay are reported. The experimental results
show that:
- at low flow rates, NPSH curves are independent of the silt concentration,
- at high flow rates, NPSH curves of silt mixtures appear to be higher than
those of water,
- the both required and available NPSH curves show that cavitation flow rates
decrease with increasing concentration, indicating that cavitation accelerates
with the concentration.
Finally, based on the silt studied, it can be concluded that the cavitation NPSH
curve at high flow rates is not sensitive to gravitational forces, but only to the
viscous flows.
Keywords: centrifugal pump, solid-mixture, cavitation, NPSH curve, silt
concentration.
1 Introduction
In Algeria, silting of reservoirs has become a major drawback for all existing
dams, because it causes very high losses in capacity. Such losses are estimated at
20 million cubic meters per year for some dams (Errih [1]). Hydraulic dredging
Keywords
centrifugal pump, solid-mixture, cavitation, NPSH curve, silt
concentration.
Related Book
Other papers in this volume
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