液相管道流量与压力对小孔泄漏速率的影响

发布时间：2018-01-12 16:08

本文关键词：液相管道流量与压力对小孔泄漏速率的影响　出处：《石油学报》2016年02期 　论文类型：期刊论文

【摘要】：泄漏速率计算是计算泄漏量、评估泄漏风险的前提和基础,通过搭建液相管道小孔泄漏实验系统,构建不同泄漏场景,研究管道流量、压力对管内液体压力及泄漏速率变化的影响规律,提出了小孔泄漏稳定压力计算方法,有效解决经典计算公式中压力求解问题;通过对泄漏模块仿真模拟,得到了泄漏孔口界面的速度分布情况,并研究了管道流量、压力对速度分布的影响。实验和数值模拟结果表明:泄漏发生后,管道压力下降明显,泄漏稳定压力与初始压力、管道流量呈对数关系,初始压力、管道流量越大,泄漏稳定压力越高,但相较于初始压力,泄漏稳定压力差值减小;管道流量越大,达到泄漏稳定的时间越短,泄漏达到平衡越快;泄漏孔处,面对来流方向壁面附近速度较高,背向来流方向壁面附近有负压、涡旋,且随着管道流量、初始压力的增加,最大泄漏速度增加,但负压范围、程度减小。
[Abstract]:The calculation of leakage rate is the premise and foundation to calculate the leakage amount and evaluate the leakage risk. Through the establishment of a small hole leak experimental system of liquid phase pipeline, different leakage scenarios are constructed, and the pipeline flow rate is studied. The influence of pressure on the variation of liquid pressure and leakage rate in pipe is studied. A method for calculating the steady pressure of small hole leakage is put forward, which effectively solves the problem of pressure solution in the classical formula. Through the simulation of the leakage module, the velocity distribution of the leakage hole interface is obtained, and the influence of the pipeline flow rate and pressure on the velocity distribution is studied. The experimental and numerical simulation results show that: after the leakage occurs. Pipeline pressure decreases obviously, leakage stability pressure and initial pressure, pipeline flow is logarithmic relationship, initial pressure, pipeline flow, leakage stability pressure is higher, but compared with initial pressure. The leakage stability pressure difference is reduced; The larger the pipeline flow, the shorter the time to reach the leakage stability, and the faster the leakage reaches equilibrium. At the leak hole, the velocity near the wall is higher in the direction of the flow, and there is negative pressure and vortex near the wall in the direction of backflow. With the increase of the initial pressure and the flow rate of the pipeline, the maximum leakage velocity increases, but the negative pressure range. The degree is reduced.
【作者单位】：中国石油大学海洋油气装备与安全技术研究中心;中国石油大学机电工程学院;中国石油化工股份有限公司管道储运分公司;
【基金】：中央高校基本科研业务费专项资金项目(15CX05018A) 青岛市民生科技计划重点支持项目(14-2-3-64-nsh)资助
【分类号】：TE88
【正文快照】： (1.Centre for Offshore Engineering and Safety Technology,China University of Petroleum,Shandong Qingdao 266580,China;2.College of Mechanical and Electronic Engineering,China University of Petroleum,Shandong Qingdao 266580,China;3.Sinopec Pipeline Storag

【相似文献】