气液两相流管道泄漏规律模拟

发布时间：2018-05-13 10:40

本文选题：气液两相流 + 泄漏规律　；参考：《油气储运》2017年08期

【摘要】：气液两相流管道流动参数复杂,一旦发生泄漏,管道内的工艺运行参数会发生改变,从而极大地增加泄漏检测难度。以流体力学基本守恒方程为基础,利用双流体模型建立气液两相流泄漏系统数学模型,并以5 km混输管道为模型,模拟分析分层流和段塞流流型下气液两相流管道的泄漏规律,探究流型、泄漏点尺寸及位置等因素对流动参数的影响。结果表明:管道发生泄漏后,管道沿线压力均降低;泄漏点上游流速略有上升,下游流速明显降低;泄漏点下游持液率降低,上游持液率几乎不变;当流型为分层流时,泄漏不会导致流型改变;当流型为段塞流时,较大尺寸的泄漏会使流型由段塞流变为分层流,较小尺寸的泄漏不会改变流型;泄漏点越靠近管道出口,泄漏点上游压力降低幅度越小。
[Abstract]:The flow parameters of gas-liquid two-phase flow pipeline are complex. Once leakage occurs, the process operation parameters in the pipeline will change, thus greatly increasing the difficulty of leak detection. Based on the basic conservation equation of fluid mechanics, the mathematical model of gas-liquid two-phase flow leakage system is established by using two-fluid model, and the leakage law of gas-liquid two-phase flow pipeline under stratified flow and slug flow pattern is simulated and analyzed with 5 km mixed pipeline as the model. The effects of flow pattern, leak size and location on flow parameters were investigated. The results show that the pressure along the pipeline decreases after the leakage, the upstream velocity increases slightly, the downstream velocity decreases obviously, the downstream liquid holdup decreases, the upstream liquid holdup is almost unchanged, and the flow pattern is stratified. Leakage does not change the flow pattern; when the flow pattern is slug flow, the larger size leakage will cause the flow pattern to flow from slug to stratified flow, and the smaller size leakage will not change the flow pattern; the closer the leakage point is to the outlet of the pipe, The lower the upstream pressure is, the smaller the pressure is.
【作者单位】：中国石油大学(华东)储运与建筑工程学院;中海油石化工程有限公司;
【基金】：国家重点研发计划专项“临海油气管道及陆上终端设施损伤机理与演化规律研究”,2016YFC0802301
【分类号】：TE973

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