High-temperature and high-pressure centrifuging pump impeller comprehensive design method based on multidisciplinary optimization

Abstract

The invention relates to optimization design of a centrifuging pump, and discloses a multidisciplinary optimization design method for a centrifuging pump impeller operated in high-temperature and high-pressure limiting working conditions. The design method is a high-temperature and high-pressure pump impeller multidisciplinary optimization hydraulic design method based on four disciplines of fluid mechanics, mechanics of materials, structural mechanics and thermodynamics; and by performing multidisciplinary evaluation on a design scheme, the optimal safety performance of the pump is achieved while a condition that the hydraulic performance of the pump is better than design index is ensured. The optimization design process provided by the invention comprises system-level optimization and sub system-level optimization; the task of the system-level optimization comprises a multi-working-condition, low-gas-etching and high-efficiency hydraulic power design method of the centrifuging pump under the high-temperature and high-pressure working conditions to enable performances of multiple system objectives to be optimal; the sub system-level optimization comprises optimization of hydraulics based on a CFD technology, reliability optimization based on the structural mechanics, and multi-field coupling design based on thermodynamics; and the overall optimal solution of the system is obtained by analyzing a synergetic effect generated by interaction of the disciplines.

Description

technical field [0001] The invention relates to the optimal design of a centrifugal pump, in particular to a multidisciplinary optimal design method for a centrifugal pump impeller operating under high-temperature and high-pressure extreme working conditions. 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 thermodynamics. For example, fire p...

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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