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The effects of area ratio of the diffuser entrance to the nozzle exit, displacement vessel volume, and suction gap configuration on the performance of pumping systems with a Venturi-like reverse flow diverter are investigated experimentally. The performance of a pumping system with area ratio of 1.5 is greater than one with area ratio of 1.0, but when the jet outlet velocity ranges from 1225 m/s, the performance of a suction gap in the shape of an axially-symmetric cylinder is the same as one with an arch-like configuration. The effective lifting factor should be more than 1.0, which means that the effective volume of the displacement vessel must be at least 1/(q-1) times the riser tube volume.

Experimental Characteristics of Pneumatic Pulse Jet Pumping Systems with a Venturi-Like Reverse Flow Diverter