单重态氧发生器分离性能数值模拟

Numerical simulation of separation performance of singlet oxygen generator

为了解决单重态氧发生器气液分离效率不高的问题,设计了一种使用螺旋式叶片对雾化液滴高速离心的发生器.基于计算流体力学方法对反应区域分离性能进行数值模拟,使用Creo对发生器和流场进行三维建模,并在Fluent软件中使用多重参考系(MRF)模型和离散相模型(DPM)相结合的方法对模型进行数值模拟,在不同结构参数、操作参数以及物性参数下进行系统性仿真,得到不同参数下连续相的流场分布及离散相的运动颗粒特性曲线.研究表明该发生器在2000 r/min的转速下能够对20μm及以上粒径的液滴有90%以上的分离效率.

In order to solve the problem of low gas-liquid separation efficiency of singlet oxygen generator,a generator with spiral blades for high-velocity centrifugation of atomized droplets is designed.The separation performance of the reaction zone is numerically simulated based on computational fluid dynamics method.The three-dimensional model of the generator and flow field is built by using Creo,and the model is numerically simulated using the combination of multiple reference frame(MRF)model and discrete phase model(DPM)in Fluent software.For the systematic simulation under different structural parameters,operating parameters and physical property parameters,the flow field distribution of the continuous phase and the characteristic curve of the moving particles of the discrete phase under different parameters are obtained,and the research shows that the generator can achieve more than 90%of separation efficiency for the droplets of 20μm and above particle diameter at the rotating velocity of 2000 r/min.