Multidisciplinary optimization method of high temperature and high pressure centrifugal impeller based on genetic algorithm

Abstract

The invention relates to optimization design for a centrifugal pump and discloses a multidisciplinary design method for a centrifugal type impeller running under extreme conditions of high temperature and high pressure on the basis of a genetic algorithm. According to the invention, an optimization process of a high temperature and high pressure centrifugal type impeller is modularized; a hydraulic design module based on the genetic algorithm is arranged as a first module; a CFD calculation module based on a CFD technique is arranged as a second module; a fluid solid heat coupling calculation module based on secondary genetic optimization is arranged as a third module; a system optimizing module is arranged as a fourth module; the hydraulic design module, the CFD calculation module and the fluid solid heat coupling calculation module are connected with each other in turn; a calculation result of a previous module is used as an initial condition for calculation of a next module; the calculation results of the CFD calculation module and the fluid solid heat coupling calculation module are used as inputs of the system optimizing module; and a synergetic effect generated by the interaction of the two modules can be analyzed, so that the overall optimal solution of the system can be acquired.

Description

technical field [0001] The invention relates to the optimized design of a centrifugal pump, in particular to a multidisciplinary design method for a centrifugal impeller operated under high-temperature and high-pressure extreme working conditions based on genetic algorithm optimization. Background technique [0002] In recent years, some large-scale high-temperature and high-pressure multistage centrifugal pumps are developing in the direction of large capacity, high speed, high efficiency, reliability, low noise and automation in all countries in the world. At present, the demand for high-temperature and high-pressure multistage centrifugal pumps is increasing. However, it is difficult to make a breakthrough in the development of large-scale industrial pumps in China, and most of them rely on imports. The design of high-temperature and high-pressure centrifugal pumps involves multiple disciplines such as fluid mechanics, material mechanics, structural mechanics, and thermod...

AI Technical Summary

Problems solved by technology

This design method ignores the relationship between the various subsystems within the engineering system, so it cannot meet the needs of engineering technology development.

On the one hand, the theories of structure, power, control and other disciplines are constantly improving, and the rapid development of computing power enables designers to build more complex mathematical models, analyze more detailed configurations, and improve the accuracy of analysis results. Structural analysis, flow field analysis using computational fluid dynamics, etc., but the above-mentioned advances basically occurred within the scope of specific disciplines or subsystems, and did not bring any direct benefits to the overall design

In sharp contrast to the vigorous development of various disciplines or subsystem theories, the development of overall design methods for the design of pump fluid machinery has been stagnant for a long time, with backward theories and outdated methods. They have played an extremely important role and made great contributions to the development of my country's pump industry, but they ignore the coupling effect between various disciplines in the engineering system, cannot make full use of the development achievements of disciplines, and are inconsistent with the organizational form of engineering design

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