注气对油水分离水力旋流器流场影响模拟分析

采用雷诺应力湍流模型、混合模型和离散相模型对注气型油水分离水力旋流器进行数值模拟,得到其内部流场的速度分布和油滴粒子运动轨迹,分析对比了注气前后进口流量、分流比和充气量对分离效率的影响,数值计算结果与文献实验值进行了比较。结果表明,充气后流场速度增加,油滴粒子逃逸时间缩短,旋流器分离效率提高5%~10%,在一定条件下气浮对旋流分离起到强化作用。

Simulation Analysis of Gas Injection Influence on Flow Field in Oil-Water Hydrocyclone

Based on Reynolds stress turbulent model,mixed model and discrete phase model,the numerical simulation of gas-injected oil-water hydrocyclone was performed to get velocity distribution and oil drop＇s trajectory in flow field.Before and after the gas injection,having the effect of inlet flow rate,split ratio and gasliquid ratio on the separation efficiency analyzed and having calculation results compared with experimental values show that injecting gas can increase flow velocity and reduce escaping time of oil droplets,as well as increase the separation efficiency by 5％ to 10％,this indicates that under a certain condition,the gas flotation in hydrocyclone can enhance separation efficiency.