循环旋风分离器内气液两相流动数值模拟

采用雷诺应力模型RSM对循环旋风分离器内气液两相流动的情况进行了数值模拟研究,讨论了循环旋风分离器内切向速度、轴向速度、径向速度、压力场、雷诺应力的分布特点以及相同入口速度下分离器内液滴运动轨迹与分离器的分离效率。数值模拟结果表明,循环旋风分离器切向速度呈现明显的驼峰状,轴向速度上行流和下行流明显,径向速度相对较小,压力由轴心向外逐渐升高,雷诺应力分布复杂且无明显规律,分离器对小直径液滴分离效率较低,入口速度对分离效率的影响比较明显。

Numerical Simulation of the Gas-Liquid Two Phase Flow in Circulation Cyclone Separators

A numerical simulation research was carried out of the gas-liquid two phase flow in circulation cyclone separators using Reynolds stress model（RSM） , the distribution characteristics of the tangential velocity, axial velocity, radial velocity, pressure field, and Reynolds stress in circulation cyclone separators, and the trajectories of the liquid drop movements in the separators and the separation efficiency of the separators under the same inlet velocity, were discussed. The numerical simulation result shows that the tangential velocity had an obvious hump shape, the uplink and downlink flows of the axial velocity was clear, the radial velocity was comparatively slow, the pressure became gradually outward high, the distribution of Reynolds stress was complex and had not obvious laws, the efficiency of the separators was low for small-sized liquid drops, the influence of the inlet velocity on the separation efficiency was comparatively evident.