Abstract: When the gas-liquid two-phase flows through tee pipeline, the distribution of two phase in two branch pipes is always uneven. There may be only gas branch in pipelines when it is serious, while the other export tube may be full of liquid. The numerical simulation on oil-gas two phase fluxion in different time by CFD was made and the oil and gas separation characteristics in branch pipes were get. The results show that there will be gas-liquid separation phenomenon in branch pipe when the oil and gas flow through branch pipe of tee pipeline, and close to the mouth branch the separation phenomenon is obvious. There is almost no separation phenomenon in certain distance of the branch mouth.

Key words: Tee pipeline, Oil-gas separation, Numerical simulation

摘要： 气液两相流经T型管后，两相介质在各自分支管内相态分布不均，严重时支管内可能只有气体，而主管内为气液混合物。借助CFD软件数值模拟了不同时刻分支处的流动情况，得到了分支管内油气分离特性。结果表明：油气流经T型分支管时，会在支管处出现气液分离现象，离分支口越近，分离现象越明显；当距分支口一定距离时，几乎没有分离现象。

关键词: T型管道, 油气分离, 数值模拟