HTR蒸汽发生器环形通道内单液滴蒸发行为研究

Numerical Simulation of Single Droplet Evaporation in Steam Generator Annular Channel of HTR

高温气冷堆进水事故的机理研究对该反应堆安全具有重要意义。本文对液滴在蒸汽发生器环形通道内的流动和传热进行数值模拟研究,采用单液滴模型,利用龙格库塔方法进行求解。结果表明,初始直径小于420μm的液滴将无法运动到环形通道顶部。氦气压力的改变对于液滴完全蒸发需要的时间和液滴最大运动距离影响很小。

The mechanism research of water ingress accident in high‐temperature gas‐cooled reactor （HTR） has a significant meaning for the safety of HTR .The flow and heat transfer of droplet in the steam generator annular channel w ere simulated by using single droplet model and solved by Runge‐Kutta method in this paper .The results show that the droplet cannot reach at the top of the annular channel if the droplet’s initial diameter is less than 420 μm .The change of helium pressure has little effect on the droplet’s evaporation time and maximum movement distance .