关键词: 核电站, 蒸汽限流器, 文丘里管, CFD

Abstract: Stream limiter is an important component of the steam generator in nuclear power plant, which plays a necessary role to ensure the safe operation of the reactor. Based on the CFD numerical simulation method, the flow field characteristics and key performance of two mainstream venturi steam restrictors are compared.The results show that the flow limiting capacity of the nineteen⁃nozzles is 6% higher than that of the seven⁃nozzles,and the pressure loss is only 67.3% of that of the seven⁃nozzles. Research results of this work can be a reference for stream limiter's design and model selection.

Key words: Nuclear power plant, Steam generator, Venturi tube, CFD