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机坪管道底部积水引起的腐蚀产物容易堵塞管道,影响管道正常运行。结合计算流体力学和等效切应力原理,运用CFD技术对机坪管道积水驱除过程的流动特性进行三维数值模拟,分析大管径工况下机坪管道底部积水的驱除状况,得出影响积水流态的主要参数及积水能够被完全驱除的临界条件,揭示机坪管道积水后系统的流动特性。结果表明:管道底部积水形态与油相流速、管路布置、积水量等参数有关;利用管道内部油相将底部积水完全携带出管道,需要增大油相流速、降低倾角、减小积水量。研究大管径管道积水的流动特性对机坪管道积水驱除的实际应用具有重要的指导意义。
Corrosion products caused by accumulation of water at the bottom of the apron pipe can easily block the pipe and affect the normal operation of the pipe. Combining the principles of computational fluid dynamics and equivalent shear stress, the CFD technique was used to simulate the flow characteristics of the apron pipe water drainage process, and the removal of water accumulation at the bottom of the apron pipe under the condition of large pipe diameter was analyzed. The main parameters of water flow pattern and the critical conditions of water catchment that can be fully expelled reveal the flow characteristics of the system after the flat water pipes have been collected. The results show that the shape of the water at the bottom of the pipeline is related to the flow velocity of the oil phase, the layout of the pipeline and the amount of water accumulation. Utilizing the oil phase inside the pipeline to completely carry the bottom water from the pipeline, it is necessary to increase the flow rate of the oil phase, Water volume. It is of great significance to study the flow characteristics of large-diameter pipe hydraulics for the practical application of water-flushing of apron pipelines.