ABSTRACT
Space rocket engines and power station feedwater pumps did indeed grow to include very high speed pumps. Large international pump firms also emerged from a lengthy period of pump industry restructuring. Whilst high-speed pump technology became widespread it did so using electric motor/gearbox and steam turbines as the prime mover. Projects requiring new high-energy high-speed pumps have almost disappeared. It might appear from this that, as in the seventeenth and eighteenth centuries, centrifugal pump development has entered a quiescent period. The descriptions and photographs of the unacceptable forms of cavitation surging and the methodology of preparing a specification based upon generic data described in earlier chapters provide users with a commercially relevant route to choosing an acceptable pump. The spiralling flows of cavitation that characterise this form of surging are impressive in their violence and apparent repeatability. A number of pump constructional arrangements are usually offered for a particular application.
