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1 2018

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Inﬂuence of the outlet system parameters of a horizontal bulb pump unit on its performance characteristics

Artsiamchuk S. V., Sidorenko G. I.

Transactions of the Institute of Fluid-Flow Machinery

2018

nr 139

45--61

Results of an extensive experimental study conducted in eighties at the former Leningrad Polytechnic Institute are revised and analysed in context of some further research. The optimum length of straight outlet tubes with diﬀuser of circular cross-section and the outlet/inlet crosssectional area ratio are established. The optimum geometrical features of cranked type outlet tubes and the outlet tubes with diﬀuser cross-section transition from circular to square and rectangular ones are determined. Finally, the inﬂuence of the outlet conjunction channel slope on the pumping station eﬃciency is studied in detail.