电机定子热功耗对离心泵空化特性的影响

To investigate the influence of motor stator thermal power consumption on the cavitation performance of a spatial centrifugal micropump using perfluorotriethylamine as the working fluid, this paper employd the Z-G-B cavitation model. Initially, a comparison between the numerical calculation results considering thermal effect and those not considering thermal effect under different cavitation numbers was conducted. On the basis of the variation of the working fluid′s physical properties with temperature, the impact of different inputs of motor stator thermal power consumption on the cavitation characteristics of the centrifugal micropump was explored. The results indicate that thermal effect significantly suppresses the development of cavitation, and such effect cannot be neglected; on the basis of considering thermal effect, the cavitation characteristics of the centrifugal micropump are constrained by the cooling circuit structure and do not exhibit noticeable changes with the increase of heat source input.