Abstract:

The efficiency of a lowspecificspeed centrifugal pump is concerned with the loss, the NPSHr and the stability of the head curve. The multiobjective optimization function of the geometry parameter of impeller in a lowspecificspeed centrifugal pump was found by the linear weighted combinations method with the arm of the least of the energy loss and the NPSHr and the elimination of the hump. The optimizations of the example proved that the designers can fuzzy evaluate the importance of the target functions with this method by fact experience and confirm the weight of the targets. The efficiency, NPSHr and stability of the pump can be optimized to get further scientific project in design.

Key words: multi-objective optimization; super-transitive approximate; centrifugal pump; impeller