摘要
利用Fluent软件,采用Realizablek-ε模型对不同流速、不同开孔条件下螺旋管内部流场进行了数值模拟分析。入口流速较高时,螺旋管内油水界面为向内侧管壁倒伏的"V"字形,"V"字形内侧为油相,外侧为水相;螺旋管横截面上流体速度与压力沿径向由内侧管壁向外侧管壁逐渐增大。根据模拟结果提出了螺旋管开孔优化设计方法:在高入口流速下,螺旋管外侧管壁开孔位置应选择在螺旋管横截面水平位置及其上、下一定角度处(同时开孔),从而提高油水分离效率;在保证管内压力为正值的前提下,可考虑在内侧管壁开孔释放分离出的油。为降低系统压损,应尽量降低入口流速。
The numerical simulation of flow field in helical pipe was carried out by the software Fluent 6.1 and the model of Realizable k-ε for different inlet velocity and different position of cutting hole on the helical pipe.The shape of the oil-water interface in helical pipe was shown as falling-down ＂V＂ at the high inlet velocity and the oil is inside of ＂V＂ while the water is outside of ＂V＂,meanwhile the velocity and pressure on the cross section of the pipe increased gradually from inside to outside.According to the simulation results,an optimum design of cutting holes on helical pipe has been put forward,that,for high inlet velocity,the cutting holes should be positioned on the inside of helical pipe and at the level or above level of the cross section of helical pipe,so as to improve the separating efficiency.Provided that the positive pressure in the pipe can be kept,the cutting holes can be considered on the inside of the pipe to release the separated oil.The inlet velocity should be as low as possible in order to reduce the pressure drop of the whole system.
出处
《中国海上油气》
CAS
北大核心
2010年第1期49-53,共5页
China Offshore Oil and Gas
关键词
螺旋管
油水分离
数值模拟
开孔位置
helical pipe
oil water separation
numerical simulation
position of cutting hole
