气-液旋流分离器流场数值模拟研究

为研究旋流分离器内部气体和液滴的运动情况和分离机理,用流体动力学软件Fluent对旋流分离器内部流场和液滴的运动状况进行了数值模拟研究,在模拟过程中,采用k-epsilon(2 eqn)方程来模拟气相旋流流动,采用Lagrange方法模拟液滴运动。模拟结果表明,旋流分离器内部流场呈旋转分布,分为内、外两个流场,在不同流动区域,气体压力场、速度场分布成规则变化;液滴的运动较为复杂,带有随机性;总体运动轨迹的形状与气相流场的分布趋于一致。

Research on Numerical Simulation of the Flow Field in Gas-Liquid Hydrocyclone Separator

In order to study the gas and liquid circumstance of motion and mechanism of separation in the hydrocyclone separator, the simu- lation of internal flow field of gaseous phase and the motion condition of liquid particles in it was conducted by using the FLUENT software. k-epsilon（2 eqn）model was used to simulate toroidal swirl of the gaseous phase and the Lagrange equation was used to simulate the liquid particles motion. The results showed that the flow field in gas cyclone could be divided into two parts： the inner one and outer one and there was difference between the two parts with respect to the distribution of pressure and velocity of gas; the liquid particles＂ motion was complicated and random, the total sense of movement trackway was similar to the gaseous phase flowline.