A multi-objective fuzzy hydraulic optimization design method for nuclear main pump impeller

Abstract

The invention relates to a multi-objective fuzzy hydraulic optimization design method of an impeller of a reactor coolant pump. The reactor coolant pump is strictly required to be able to safely and stably operate for a long time, and must have quite high anti-cavitation property; and when power is off in a whole plant, the reactor coolant pump halts and runs down, and the reactor coolant pump is required to have relatively long running down time, so as to reduce flow mutation to the greatest extent and guarantee safety of a reactor core after outage. According to the method, objectives that semi flow running down time under the halt running down working condition of the reactor coolant pump is the longest, and the anti-cavitation property is good are established, main design parameters of the impeller such as inlet diameter D1, outlet diameter D2, inlet vane width b1, outlet vane width b2, vane inlet setting angle beta 1, vane outlet setting angle beta 2 and vane number z are adopted as design variables, and geometric parameters of the impeller are optimized through adopting the multi-objective fuzzy optimization design method based on an SUMT method and a complex method, so that optimal geometric design parameters of the impeller are obtained, and an excellent geometric model is designed.

Description

technical field [0001] The invention belongs to the field of fluid machinery, and in particular relates to a multi-objective fuzzy hydraulic optimization design method for a nuclear main pump impeller, which can be used for hydraulic optimization design of the nuclear main pump impeller. Background technique [0002] In the nuclear island primary circuit system, the pump used to drive the coolant to circulate in the reactor coolant system is called the reactor coolant main circulation pump (referred to as the nuclear main pump). The nuclear main pump continuously transfers the heat generated in the core Transfer to the secondary circuit feed water of the steam generator. It is located in the heart of the nuclear island and is used to pump cold water into the evaporator to convert heat energy. It is the key to controlling the water cycle of nuclear power operation. It belongs to the first-level equipment of the nuclear power plant. Each steam generator has a nuclear main pump...

AI Technical Summary

Problems solved by technology

[0008] For the nuclear main pump, due to its high parameterization and extremely high safety factor requirements, the traditional design method is difficult to complete

For the optimal design of the pump, the traditional optimal design relies too much on the designer's experience and experiments, the optimization period is long, and the design cannot guarantee the defect of the boundary ambiguity

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