Multi-objective optimization method for centrifugal pump turbine hydraulic performance and external field flow-induced noise

Abstract

The invention belongs to the technical field of design for a centrifugal pump as a turbine and discloses a multiple-target optimization method for hydraulic performance and outer field flow-induced noise for the centrifugal pump as the turbine. The method comprises the following steps: step I, defining a determination method for a multiple-target optimization design variable value range for the centrifugal pump as the turbine; step II: through external characteristic experiment, building a computing method for mechanical efficiency required in CFD numerical calculation for the centrifugal pump as the turbine, so as to accurately calculate the efficiency of the centrifugal pump as the turbine; for different characteristics of the inner and outer media for the centrifugal pump as the turbine, adopting an FEM / AML sound-vibration coupling method for solving outer field flow-induced noise; step III: building sensitivity analysis models of different geometrical parameters for the efficiency of the centrifugal pump as the turbine and the outer field total noise power level; step IV: on the basis of a response surface method, carrying out multiple-target optimization on the hydraulic performance and outer field flow-induced noise. By adopting the method, the design efficiency is improved, the design period for the centrifugal pump as the turbine is shortened, the efficiency of the centrifugal pump as the turbine can be effectively improved and meanwhile, the noise of the centrifugal pump as the turbine can be reduced.

Description

technical field [0001] The invention belongs to the technical field of turbine design for centrifugal pumps, and specifically relates to a multi-objective optimization method for hydraulic and external flow-induced noise of centrifugal pumps, which is mainly used to guide the high-efficiency and low-noise hydraulic design of centrifugal pumps for turbines. Background technique [0002] There are many design variables that affect the hydraulic performance of the centrifugal pump as a turbine and the flow-induced noise in the external field, and the mechanism of action is different. To accurately grasp the relationship between them, it is necessary to carry out a large number of experiments. The basic idea of ​​multi-objective optimization is to search for the best design point from the value range of the design variables under the premise of satisfying the given constraints, so that the overall performance of the design object determined by multiple design objectives is optima...

AI Technical Summary

Problems solved by technology

The method of optimizing turbomachinery head, efficiency and cavitation with the help of optimization algorithm is basically mature, but for the turbine optimization of centrifugal pumps that take into account both hydraulic performance and external flow-induced noise, further in-depth research is needed

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