水下分离器入口预分离构件的数值模拟

Numerical simulation for inlet pre-separated elements of underwater separator

为了考察水下分离器入口预分离构件在高气液比工况下的分离效果,利用流体动力学软件FLUENT对其进行数值模拟。针对水下分离器3种长径比和3种入口倾角,建立了9个入口预分离构件的物理模型,通过模拟计算得到了各模型内部速度分布云图、速度曲线图及液滴分离效率图,并进行对比分析。结果表明:不同长径比和入口倾角对入口预分离构件内部流场的影响程度不同,长径比为4∶1、入口倾角为0°的入口构件内部流场最稳定,气液分离效果最好。

To determine the separation performance of inlet pre-separated elements of underwater separator under high gas/ liquid ratio, numerical simulation is performed with FLUENT, a hydrodynamic software. With consideration to three length/ diameter ratios and three inlet inclinations of underwater separator, the physical models for 9 inlet pre-separated elements are established. Through simulation, the internal velocity distribution cloud maps, velocity curves and fluid drop separation efficiency maps for all models are obtained and compared. It is concluded that internal flow fields in inlet pre-separated elements are differently affected at various length/diameter ratios and inlet inclinations. In particular, at length/diameter ratio of 4：1 and inlet inclination of 0°, the most steady internal flow field and the most desirable gas/liquid separation performance are obtained. （6 Figures, 6 References）