The design-methods of pump and the trend in design-method

Abstract：All the design?methods of pump are duscussed.The authors consider that the develop?direction of the pump?design?method is CAD.If CAD were used in the pump?design, the design cycle can be reduced much and the pump can be optimized quickly aimed at one target.That can reduces the experiment times and produce?cost.

Keyword：pump;similar-design method;velocity-coefficient method;CAD;