管道气顶排空过程的压降计算方法

发布时间：2018-03-26 20:43

本文选题：气液两相流　切入点：流型划分　出处：《油气储运》2016年12期

【摘要】：为了完善机动管道气液两相流的压降计算方法,为管道充气排液的设计提供理论依据,介绍了基于流型的水平管气液两相流压降计算方法,回顾总结了流型的划分方式,提出了流型划分中存在的问题;对均相流模型、飘移流模型、分相流模型进行了对比,介绍了有代表性的和近几年出现的与流型相关的压降计算方法;分析了机动管道充气排液工况中的常见流型以及流型和压降的变化趋势,排空的初始阶段为分层流,排空中间阶段分层流和段塞流同时存在,排空的最后阶段出现短暂的环状流。将排空管道分为纯气体段、气液混合段及纯液体段,建立了不同工况下的压降模型,并提出了机动管道气顶油排空中亟需解决的问题。
[Abstract]:In order to perfect the pressure drop calculation method of gas-liquid two-phase flow in mobile pipeline and to provide the theoretical basis for the design of gas-liquid discharge in pipeline, the pressure drop calculation method of gas-liquid two-phase flow in horizontal pipe based on flow pattern is introduced, and the classification method of flow pattern is reviewed and summarized. The problems existing in the flow pattern classification are put forward, and the pressure drop calculation methods related to the flow pattern are introduced by comparing the homogeneous flow model, the drift current model and the separated flow model. The common flow patterns, flow patterns and pressure drop trends in aeration and discharge of mobile pipelines are analyzed. The initial stage of emptying is stratified flow, while the stratified flow and slug flow exist simultaneously in the middle stage of emptying. In the final stage of emptying there is a brief annular flow. The emptying pipeline is divided into pure gas section, gas-liquid mixing section and pure liquid section. The pressure drop model under different working conditions is established, and the problems urgently needed to be solved in the exhaust air of the gas cap oil exhaust of the mobile pipeline are put forward.
【作者单位】：后勤工程学院军事供油工程系;
【分类号】：TE832

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