首页|Optimization design of the impeller structure for a micro centrifugal pump based on pressure pulsation and shear stress analysis
Optimization design of the impeller structure for a micro centrifugal pump based on pressure pulsation and shear stress analysis
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NETL
NSTL
Sage
Micro centrifugal pumps are commonly used in the medical field for transporting drugs or blood, etc. Due to the particularity of fluid media, irregular flow is often generated inside the pump resulting in over-high pressure pulsation and shear stress, which will eventually cause damage to the medium. In this paper, the internal flow field of a micro centrifugal pump was investigated through both visualization experiments and numerical simulations. When the main structure parameters of the impeller were selected as optimization variables, with pressure pulsation and shear stress as optimization objectives, a combination numerical simulation solution of BP neural network and genetic algorithm was employed to optimize the objectives respectively. The results indicate that the BP neural network model and genetic algorithm have high accuracy and can be used to predict the performance of micro centrifugal pumps. After optimization, the pressure pulsation strength coefficient of the monitoring point near the volute tongue is reduced by 40%. The internal flow of the micro centrifugal pump becomes more stable. The maximum shear stress of the impeller is declined by 42% and 28% in the volute. The research is of great significance to improve the stability and efficiency of micro centrifugal pumps.
NETL
NSTL
Sage
