静态水气分离器分离效率数值模拟

Numerical Simulation on Separation Efficiency of Static Gas/Liquid Separator

目的评估某型静态水气分离器的分离效率。方法采用计算流体力学欧拉-拉格朗日方法对静态水气分离器进行了数值模拟,建立水滴均匀和非均匀粒径的分离效率统计模型,考查水滴直径、气流速度分布、重力等多个因素对分离效率的影响。结果分离效率的计算值与试验值平均误差小于15%;给定入口气流速度分布,分离效率随着粒径的增大而提高;给定径向和切向速度,分离效率随轴向速度变化显著;考虑重力影响时的分离效率较高,粒径越大影响越明显。结论数值模型和方法合理,为该静态水气分离器性能改进提供了参考依据,并为其它形式的水气分离器性能分析提供了有效的数值方法。

Objective To evaluate the separation efficiency of certain static gas/liquid separator.Methods This paper adopted computational fluid dynamics Euler-Lagrange method to conduct numerical simulation on static gas/liquid separator.The statistical model of separation efficiency of uniform and non uniform droplet size was established.It examined how factors such as droplet diameter,flow velocity,and gravity had influenced separation efficiency.Results Calculated value and experimental value of separation efficiency varied less than 15%.Given a consistent air velocity distribution of inlet,separation efficiency increased with the increase of droplet size.Given consistent radial and tangential velocity,separation efficiency changed significantly in accordance with axial velocity.Separation efficiency was higher under the influence of gravity.The bigger droplet size the greater impact was.Conclusion This numerical model and its method are reasonable and can provide reference for the performance improvement of certain static gas/liquid separator.It also provides effective numerical method for performance analysis of other forms of gas/liquid separators.