叶片式旋风管流场数值模拟研究  

Numerical Simulation of Flow Field for Vane-type Cyclone Tube

作　　者：李琦[1,2] 罗敏[1] 管西旗[2] 韩传军[2] 杨生红[1] 

机构地区：[1]西南油气田分公司输气管理处,四川成都610213 [2]西南石油大学石油天然气装备教育部重点实验室(西南石油大学),四川成都610500

出　　处：《石油化工设备》2015年第1期34-39,共6页Petro-Chemical Equipment

摘　　要：为完成天然气输送中的净化,探究含杂质天然气在旋风分离器中的流动和分离规律,以常温下的甲烷气体近似替代天然气作为研究对象,运用数值模拟方法对叶片式多管旋风分离器中单管流场的压力、流速和湍流情况进行了分析。数值模拟计算结果表明:1叶片式旋风管主筒内的外旋流压强较高,内旋流压强较低。整个旋风管中心处的压力最低,横切面压力变化呈近似V型分布。2从入口到出口,单管压降约为5.3kPa。3横切面速度值沿轴向变化不大,成驼峰状分布。4湍流动能集中于主筒的环形空间中,湍流动能耗散率比较高的区域则分布于排气口处和主筒较小的环形区域内。5排气管入口处气流速度最大,容易引发气流短路与扰流。模拟分析的结果总体上与工程实际测量吻合较好。In order to ensure the natural gas being transported and study the law of the flow in the single cyclone separator, the methane gas was analyzed as research object in the vane-type separator. The results show that outer pressure is higher than the internal pressure in the main cylinder of the cyclonic tube, and the pressure in the center of the cyclonic tube is the lowest. The distribution of pressure is similar to V shape, and the drop of the pressure is 4.3 kPa from inlet to outlet. The value of the velocity along the axial varies little and appears like a ＂Hump＂. The turbulent kinetic energy concentrated in the annular space of the main barrel, and the turbu- lent kinetic energy dissipation rate is relatively high between the exhaust port and the main barrel within a small region. The velocity of gas at the outlet is the largest and easy to cause a mixture. The calculations are consistent with the observations in engineering practices.

关 键 词：旋风管 天然气 净化 分离 数值模拟 

分 类 号：TQ050.2[化学工程] TB115.2[理学—数学]