Transcription of Types of Pumps
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Types of Pumps
An Internet Book on Fluid DynamicsTypes of PumpsPumps come in a vast array of shapes and sizes and in a great range of designs. Here we give just a fewexamples of Pumps from a range of different technological contexts. The presentation will generally followa framework of progressively decreasing specific speed,N, and so will begin with high specific speed pumpsfrom applications involving high flow rates and relatively modest head rise. Figure 1 depicts a schematicand a picture of typical axial flow Pumps in which the flow emerges axially from the impeller but dischargeslaterally from the machine.
There are, of course, other types of pumps and compressors, in particular positive displacement pumps whose advantage is that they deliver a particular flow rate relatively independent of the head rise. These, too, come in different types: many are driven by a reciprocating mechanism with passive suction and
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