加压气液鼓泡塔的CFD数值模拟与ERT实验验证

摘要

在内径0.3 m,高6.6 m的加压鼓泡塔内,采用计算流体力学(CFD)数值模拟与气泡群平衡模型(PBM)耦合法进行塔内流体力学模拟,并将数值模拟结果与基于电阻层析成像技术(ERT)的实验结果对比分析,将通过ERT实时采集的横截面气含率分布和时间序列图与模拟结果进行比较.结果表明:ERT技术测量结果与CFD计算结果吻合良好,能很好地表示鼓泡塔内气液流动状态,进一步表明ERT技术对加压鼓泡塔内气液两相流进行可视化与实时测量是可行的.%The computational fluid dynamics (CFD) numerical simulation and the population balance model (PBM) coupling method were used to simulate the fluid dynamics in the pressurized bubble column with the diameter of 0.3 m and the height of 6.6 m.The results of numerical simulation were compared with the experimental results based on electrical resistance tomography (ERT), and the comparison of the gas holdup distribution and time series diagram of the cross-section collected by ERT in real time was compared with the simulation results.The results showed that the results measured by the electrical resistance tomography techniques were in good agreement with the calculated results of computational fluid dynamics, which could well represent the gas-liquid flow state in the bubble column. It was further demonstrated that ERT technique was feasible for visualization and real-time measurement of gas-liquid two phase flow in the pressurized bubble column.