摘要
为获得铅水反应过程中铅铋凝固的动力学机制,了解微观枝晶生长过程,通过分析铅铋熔液的自然对流及其对凝固前沿的影响,建立了枝晶间铅铋合金平均流动速度方程;采用通过相场法模拟了枝晶生长过程。结果表明,在2个方向的流场共同作用下,枝晶的快速生长区明显向来流方向倾斜。本研究可为铅铋凝固提供动力学机理分析,为铅基堆的安全运行提供理论基础。
To obtain the kinetic mechanism of lead-bismuth alloy solidification during the leadwater interaction and understand the microscopic dendrite growth process,the average flow velocity equation of lead-bismuth alloy between dendrites was developed by analyzing the natural convection of lead-bismuth melt and its influence on the solidification front.In addition,the dendrite growth process was simulated by using the phase field method.The results showed that the fast growth zone of dendrites was markedly tilted toward the incoming flow direction under the joint action of flow fields in two directions.This work can provide kinetic mechanism analysis for leadbismuth alloy solidification,and provide the theoretical basis for the safe operation of lead-based reactors.
作者
张林
刘达霖
邓畅
刘晓晶
Zhang Lin;Liu Dalin;Deng Chang;Liu Xiaojing(School of Nuclear Science and Engineering,Shanghai Jiao Tong University,Shanghai,200240,China)
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2023年第S01期51-56,共6页
Nuclear Power Engineering
