摘要
管内智能封堵器可以在不停输的状态下,通过无线控制系统在管道内部进行高压封堵作业,为保证封堵器安全平稳工作,减少管内受阻流场对封堵作业的影响,需要对管内高压封堵过程流场演化规律以及封堵器在封堵过程中的受力变化情况展开研究。通过建立管内智能封堵器三维模型,采用质量、动量守恒方程对高压管内封堵作业时封堵器周围流场进行数值模拟,得到了封堵器受力与封堵进度、入口压强、入口速度之间的关系。根据演化规律发现,不同端面对流场的特征变化以及封堵器受力情况有一定影响,提出两种具有弧线特征的端面形状,模拟结果表明:半球形端面智能封堵器在封堵作业时,其周围流场特征变化及封堵器受力均优于台阶形和抛物面形端面结构,由此为管内高压稳定型封堵器的结构设计及优化提供了依据。
In-pipe intelligent plug can fulfill high-pressure plugging operation inside the pipeline by means of wireless control system while the pipeline is in operation. In order to keep the plug operating safely and smoothly and reduce the effect of blocked flow field inside the pipeline on plugging operation, it is necessary to investigate the evolution laws of flow field and the force on the plug in the process of high-pressure plugging inside the pipeline. In this paper, the 3D model of inpipe intelligent plug was established to simulate numerically the flow field around the plug in the process of high-pressure plugging inside the pipeline by mass and momentum conservation equations. And accordingly, the relationships between the force on the plug vs. plugging schedule, inlet pressure intensity and inlet velocity were obtained. It is indicated from the evolution laws that different end faces have a certain effect on the characteristics of flow field and the force on the plug. Two kinds of end face shapes with the characteristic of pitch arc were proposed. The simulation reveals that in the process of plugging, the intelligent plug with the semi-spherical end face is superior to those with stepwise or paraboloidal end face in terms of the variation of flow field characteristic around the plug and the force on the plug. The research results provide the basis for the structural design and optimization of in-pipe high-pressure stable plugs.
出处
《油气储运》
CAS
北大核心
2018年第4期413-420,共8页
Oil & Gas Storage and Transportation
基金
国家自然科学基金资助项目"海底油气管道封堵致振机理及气动减振控制方法研究"
51575528
关键词
管道输送
智能封堵器
高压
演化规律
流场特征
端面结构
pipeline transportation
intelligent plug
high pressure
evolution law
flow field characteristic
end face structure
