Two-phase flow coupling method based on signal filtering nuclear power system program

Abstract

The invention relates to the technical field of two-phase flow coupling, in particular to a two-phase flow coupling method based on a signal filtering nuclear power system program, and the method comprises the steps: S1, building a thermal model of a simulation object; s2, splitting the thermal model according to a flow boundary, and taking parameters such as pressure and gas phase internal energy as coupling input parameters of the flow boundary; s3, a nuclear power plant operation simulation platform NURES is utilized to couple the split thermal model, and the coupling mode is two-phase fluid coupling; and S4, performing first-order lagging filtering on the pressure value in the two-phase fluid coupling output interface transmission parameters, and taking the obtained new pressure value as a coupling input parameter. According to the method, during thermal program parallel calculation of a nuclear power plant simulation platform, the flow oscillation phenomenon occurring when two-phase flow exists in a coupling interface is eliminated through first-order lagging filtering processing, and the problems that simulation operation and operation data are unstable and unreasonable due to the fact that two-phase flow oscillation exists in a simulation model are solved.

Description

Technical field [0001] The present invention relates to the field of two-phase flow coupling technology, in particular to a two-phase flow coupling method based on a signal filtering nuclear power system program. Background [0002] In the development and application of nuclear engineering technologies, the Nuclear Power Plant Operation Simulation Platform (NURES) is used to verify nuclear power plant control systems and train operators. It is generally divided into simulation platform scheduling control system model and thermal model. For the verification of the control system of the nuclear power plant, the simulation platform communicates with the control system of the nuclear power plant through hard wiring and software communication, and the nuclear power unit model adopts the thermal model built by the thermal hydraulic analysis program. The thermal model is built by the best estimation thermal hydraulic program, hereinafter referred to as the thermal program, and the NURES...

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Problems solved by technology

However, the nuclear power unit model built by the thermal engineering program is often due to the high complexity of the nuclear power unit system, and the simulation time calculated by the simulation model is much longer than the natural time

In view of the fact that the real-time requirements cannot be realized, thermal models can be split and coupled; for complex and large-scale thermal models, an appropriate split boundary can be selected, and multiple optimally estimated thermal-hydraulic programs can be realized based on NURES Simultaneous calculation; at the same time, when there is two-phase flow at the coupling interface, due to the sensitivity of gas to pressure fluctuations, boundary flow oscillations will occur, resulting in unstable and unreasonable problems in simulation operation and operation data

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