弯曲微通道气液两相流动特性数值模拟

Numerical Simulation Study of Gas-liquid Two-phase Flow in Curved Micro-channel

以空气-水为工质,利用数值模拟方法研究了不同曲率比下S型弯曲微通道气液两相流动特性,获得了弹状流Ⅰ、弹状流Ⅱ、扰动流、间歇流和环状流五种流型。同工况下,将模拟结果与已做实验结果对比,证明了模拟过程的正确性。运用正确的研究模型,对S型弯曲微通道内的二次流动现象以及对流型的影响进行了研究,从而为设计优异的微型换热器和微化工混合器的气液流动分布结构提供理论指导和技术支撑。

Using air-water as working medium,the gas-liquid two-phase flow characteristics in S-shaped curved microchannels with different curvature ratios were studied by numerical simulation method,and the five flow patterns including slug flowⅠ,slug flowⅡ,perturbed flow,intermittent flow and annular flow are obtained.Under the same conditions,the simulation results are compared with the experimental results,and the correctness of the simulation process is proved.The secondary flow phenomenon and the effect of convective flow in S-shaped curved microchannels were studied by using the correct research model,which provided theoretical guidance and technical support for the design of excellent gas-liquid flow distribution structure of micro-heat exchangers and micro-chemical mixers.