Abstract
In piping systems, including centrifugal pumps, a pressure pulsation is generated. In this report, a centrifugal pump is assumed to have two characteristics : one is the generation of pulsation and the other is the propagation of waves. The combination of these two characteristics is linear, and the latter is described by a transfer matrix. The values of these characteristics are obtained by experiments and the above assumption is confirmed. The mechanism for pressure pulsation generation and the roll of the pump in pressure pulsation are grasped more exactly. The pulsation source of a centrifugal pump is the pulsating pump head. These experiments make it clear that the strength of the pulsation source is independent of piping systems, and its amplitude and phase are both almost constant at constant revolutions of the impeller.
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