两种气液两相流模型的应用和比较

本文应用MUSIG模型1]和均一直径模型对某溶液堆台架模型堆芯内气液流动传热进行了数值模拟.在MUSIG模型中堆芯内离散相气泡被分为5组不同直径的气泡,用于分析堆芯内气泡的流动变化和大小分布,采用Luo and Svendsen2]和Prince and Blanch3]模型描述不同直径气泡组间的破裂和聚合.在均一直径模型中,堆芯内的气体被考虑为同一直径的组分,并且不考虑其破裂与聚合现象.计算得到采用两个模型的模拟结果并且对其进行了对比研究.结果显示应用MUSIG模型的计算结果与台架实验结果吻合更好.

THE APPLICATION AND COMPARISON BETWEEN TWO KIND OF GAS-LIQUID NUMERICAL MODELS

The MUSIG model and the mono-disperse model are used to simulate the multiphase flow and heat transfer phenomena in a liquid reactor's core model.In simulation with MUSIG model, bubbles in the model is divided into 5 groups and these groups are used to analyze the bubbles' distribution and change in the flow.Luo and Svendsen model and Prince and Blanch model are used to describe the break and aggregation between bubbles.In simulation with mono-disperse model,bubbles in the liquid reactor's core model is considered to have only one size,so the break and aggregation between bubbles are not in consideration.The results of simulation with the two models are compared,and the MUSIG model comparatively tallies with results of experiment.