压水堆下腔室水力特性数值研究

Numerical simulation on hydraulic characteristics of lower chamber of PWR

为了分析压水堆下腔室的工水力特性,以流体计算软件FLUENT为工具,以秦山二期压水堆电站作为研究对象,对其下腔室进行了数值模拟.在下腔室计算过程中,建立了相关的几何模型,并且对几何模型进行网格划分;湍流模型主要采用了标准k–ε模型进行模拟计算.结果表明,下腔室出口速度分布满足从中心至边缘依次递减的的规律;下腔室所受最大压力主要出现在两块支撑块及其附近壁面处.所获得的研究成果可为核电厂的设计、优化和运行管理提供指导.

In order to research the hydraulic characteristics of the lower chamber , this paper took the numerical simulation software FLUENT as the tool to investigate the Qinshan Phase two pressurized water reactor power station as the research object and calculated the lower chamber .In the calculation of the lower chamber , this paper established the model and di-vided mesh of it .The standard k -ε model was used .The results showed that the velocity distribution in the outlet of lower chamber follows a rule that was declining from the center to the edge .The maximum pressure in the lower chamber mainly appeared in the two support-ing blocks and the wall neared them .The present studies had great significance and could provide valuable references for the design , optimization and operation management of the power stations.