基于Mixture模型泡沫发生器气液两相流数值模拟

Numerical Simulation of Gas-liquid Two-phase Flow in Foam Generator Based on Mixture Model

为提高泡沫发生器发泡效果,优化泡沫发生器内部结构设计,采用流体仿真技术对泡沫发生器内部流场进行数值模拟,分析速度、压力以及气相体积分布,研究不同进气方式以及挡板高度对泡沫发生器内部流场影响,结果表明:中心进气式泡沫发生器内部气液混合均匀程度优于边缘进气式泡沫发生器,内部压力损失比边缘进气式大;在泡沫发生器内部增设挡板有利于增强泡沫发生器内部的气液两相混合均匀程度,随着挡板高度的增加,气相和液相混合越均匀,但会增大泡沫发生器内部压力损失,其研究结果对泡沫发生器结构的优化设计提供理论依据。

Using fluid simulation software to numerically simulate the internal flow field of the foam generator.Study the influence of different air intake methods and baffle height on the internal flow field of the foam generator.The results show that the uniformity of gas-liquid mixing in the central intake foam generator is better than that of the edge inlet foam generator,and the internal pressure loss is larger than that of the edge inlet type;Adding a baffle inside the foam generator.It is beneficial to enhance the uniformity of gas-liquid two-phase mixing inside the foam generator.With the increase of baffle height,the gas phase and liquid phase mix more evenly,but the pressure loss of the foam generator will be increased.The results provide a theoretical basis for the optimal design of foam generator structure.