借助CFD方法的燃料转运通道热工水力实验的台架设计

Design of Thermal-hydraulic Experiment Facility in Fuel Transfer Tube with CFD Method

核电厂安全设计中,需要考虑燃料转运过程中的热工安全问题。具体而言,需要研究复杂几何结构内发生于狭窄水平流道的有加热源的自然循环流动传热过程。借助计算流体力学(CFD)方法,对流动传热过程进行了预研,并据此选定了重点研究区域和关键物理现象。结合实验需求,设计了专用的热工水力实验台架,并根据相似理论分析了实验段与原型之间的差异,以及由此引入的误差,为开展进一步的实验研究奠定了基础。

The thermal-hydraulic risks of fuel assemblies during fuel transfer process should be considered according to the nuclear safety design regulations.Specifically,the natural circulation in complex flow paths,namely,the flow and heat transfer in narrow and horizontal region,should be investigated.Based on pre-research by computational fluid dynamics（CFD）method,the key section in the prototype was selected and main phenomena existed in this section were identified.Thereby the experiment facility was designed according to the requirements of experiment.Based on similarity theory,the deviation analysis between facility and prototype suggests that the errors led by deviation can be tolerated,and this facility lays a basis for further experimental research.