Differential Evolutionary modeling and starting-up cavitation characteristics analysis for multistage centrifugal pump

Based on the experimental data of multistage centrifugal pump, the model parameters are identified by the differential evolution algorithm with residual correction, and the head-volume flow rate- rotation speed models of each impeller are obtained. On this basis, the analysis of the relationship between the pressure, the fluid density and the vapor content is carried out, and the cavitation analysis model of the centrifugal pump is obtained. Taking a certain type of marine condensate system as an example, the starting process of the condensate pump is simulated. It is found that the cavitation of the operating condensate pump will occur when the high temperature leaking water from the operating unit is 8t/h during the starting process. The research results can provide support for the design optimization and operation principle of the marine condensate system.