摘要
冷却剂通过细微裂缝泄漏的主要机理为临界流流动,准确预测临界流流量是实现破前漏(LBB)应用的关键。基于空化模型对窄矩形通道的临界流进行了数值模拟,探讨了表征气泡半径和气化核心密度的常数项(C)对于临界流的影响。结果表明,当C=1.25时模拟结果与实验值符合良好;在实验工况范围内,临界流质量流速的模拟结果与实验值的误差在±15%以内;修正后的空化模型可用于模拟计算上游温度、压力工况下的临界流质量流速以及归纳临界流流量变化规律。
The main mechanism of coolant leakage through micro-cracks is critical flow,and accurate prediction of critical flow is the key to realize the application of Leak-Before-Break(LBB).Based on the cavitation model,the critical flow in a narrow rectangular channel is numerically simulated,and the influence of the constant term(C)representing the bubble radius and nucleation site density on the critical flow is discussed.The results show that when C=1.25,the simulation results are in good agreement with the experimental values;Within the range of experimental conditions,the error between the simulation results of critical flow and the experimental values is within±15%;The modified cavitation model can be used to simulate and calculate the critical flow under upstream temperature and pressure conditions.
作者
尹令
孙运达
龚圣捷
Yin Ling;Sun Yunda;Gong Shengjie(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
2022年第4期5-10,共6页
Nuclear Power Engineering
关键词
临界流
空化模型
气泡半径
气化核心密度
质量流量
Critical flow
Cavitation model
Bubble radius
Nucleation site density
Mass flow
