Prediction and optimization method for efficient working condition area range of centrifugal pump impeller

Abstract

The invention relates to the field of centrifugal pump hydraulic optimization. The invention aims to provide a prediction and optimization method for an efficient working condition area range of a centrifugal pump impeller. According to the method, on the premise that the maximum efficiency point of the centrifugal pump is not changed, factors of energy loss and pressure pulsation of the centrifugal pump impeller are fully considered, an efficient working condition area of the centrifugal pump impeller is accurately predicted, and design parameters of the centrifugal pump impeller are optimized according to the efficient working condition area, so that the application range of the centrifugal pump is expanded, the operation stability of the centrifugal pump is improved, resources are saved, and the centrifugal pump is more economical. According to the technical scheme, the method for predicting and optimizing the efficient working condition area range of the centrifugal pump impeller comprises the following steps of (1) modeling and meshing, (2) CFX simulation verification, (3) vortex structure extraction, (4) energy loss analysis, (5) pressure pulsation analysis, (6) efficient working condition area prediction and (7) centrifugal pump impeller design parameter optimization.

Description

technical field [0001] The invention relates to the field of hydraulic optimization of centrifugal pumps, in particular to a method for predicting and optimizing the high-efficiency working range of impellers of centrifugal pumps. Background technique [0002] The centrifugal pump is the most widely used pump type in the pump industry. The viscosity of the fluid in the centrifugal pump, the special geometric structure of the centrifugal pump, the fluid flowing around the blades, and the high-speed rotation will inevitably cause various instability. Flow mainly includes: off-flow, backflow, secondary flow, wake flow and various eddy currents, etc. These unsteady factors coexist and have obvious effects, which will cause energy loss of the centrifugal pump and affect the operation of the centrifugal pump. In addition, due to hydraulic fluctuations, the vibration of the centrifugal pump is mainly the pressure pulsation at the dynamic and static interference between the impeller...

AI Technical Summary

Problems solved by technology

Therefore, it is necessary to propose a method that takes the high-efficiency working area of ​​the centrifugal pump impeller as the optimization standard, and optimize the design parameters of the centrifugal pump impeller without changing the maximum efficiency point of the centrifugal pump, so as to improve the high-efficiency working area of ​​the centrifugal pump impeller. The scope of the operating area, thereby expanding the scope of use of the centrifugal pump, avoiding the defect that the centrifugal pump can only maintain a high operating efficiency when operating under specific flow conditions

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