A multi-condition and multi-objective hydraulic optimization method for impellers of ultra-low specific speed centrifugal pumps

Abstract

The invention discloses a multi-working condition and multi-objective hydraulic optimization method for an ultra-low specific revolution centrifugal pump impeller. The specific steps are: measure the head, power and efficiency of the ultra-low specific speed centrifugal pump under each working condition; find out the turbulence model with the smallest error from the experimental value in the numerical calculation of the ultra-low specific speed centrifugal pump under each working condition; The combination of the maximum weighted average efficiency under one working condition or the minimum weighted average power under multiple working conditions, the minimum weighted average radial force in the impeller under multiple working conditions and the lightest weight of the impeller is the objective function. The VCM-MDF optimization strategy of the circulation structure solves the multi-working condition and multi-objective optimization model of the ultra-low specific speed centrifugal pump impeller, and solves the overall optimal solution set of the impeller; according to the optimized overall optimal solution set of the impeller, its hydraulic Model.

Description

technical field [0001] The invention belongs to the field of fluid machinery design, and particularly relates to a multi-working-condition and multi-objective hydraulic optimization method for an ultra-low specific revolution centrifugal pump impeller. Background technique [0002] Centrifugal pumps with a specific speed ≤ 30 are called ultra-low specific speed centrifugal pumps. They have the characteristics of small flow, high head, and compact structure. They have been widely used in aerospace, petrochemical and other fields. With the rapid development of aerospace, petrochemical and other industries, ultra-low specific speed centrifugal pumps are gradually developing towards high speed, high pressure and high efficiency. With the continuous expansion of the field, the application of ultra-low specific speed centrifugal pumps is becoming more and more extensive. [0003] At present, the main design methods of ultra-low specific speed centrifugal pump impeller mainly incl...

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Problems solved by technology

Use the loss extreme value method and CFD method to optimize its hydraulics, so as to find a solution with better performance, but most of the current single-objective single-working-condition hydraulic optimization is aimed at efficiency.

[0004] So far, there has been no public report on the multi-condition and multi-objective hydraulic optimization method for ultra-low specific speed centrifugal pump impellers

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