Evaluation experimentale et theorique du facteur de correction du NPSH dune pompe centrifuge debitant une mixture solide-liquide

الملخص EN

NPSHr-Q curves related to cavitation of a centrifugal pump handling solid-liquid mixtures of diameter d50 less than 100 m are determined experimentally.

Values of required NPSH obtained for different concentrations of the mud of the dam Fergoug and for different rotational speeds of the pump vary in comparison to those of water, even when they are expressed in meter of mixture column.

From these results, the correction factors of NPSH were deduced and compared with those obtained by the various known empirical formulas and by the formula proposed by the power loss analysis method.

A good agreement of the results is reached with the results of the power loss analysis method; while a deviation of 5 to 10% is observed by comparing the results with those using the other methods of calculation.

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