摘要
管道内气液两相流广泛存在于核工业、化工业以及石油运输等多个领域中,其诱发的流激力会引起管道振动,导致管系的疲劳破坏.本文分别从流激力发生机理、影响因素及计算模型出发,对流激力研究进展进行综述.研究表明:动量通量的改变被认为是引起流激力的最主要原因,管道内压力波动、液塞的脉动冲击、起伏不定的液波等因素同样会对流激力的产生做出贡献,针对不同流型建立完整的流激力发生机理的理论体系,是流激力机理研究方面的重点发展方向.在不同流型下,流激力展现出不同的波动特征,目前研究所针对的管道大多是单独的水平管或立管管道,开展多种集输–立管管道系统中流激力的研究将具有重要的工程意义.关于流激力经验模型和理论模型的建立逐渐完善,计算流体力学(Computational fluid dynamics,简称CFD)软件能够同时对流场和流激力大小进行模拟计算,优势明显,是一种重要的计算手段,对CFD软件计算结果的准确性进行研究,对比优选有效的CFD计算模拟方法,将具有重要科研价值.
Two-phase flow(Gas-liquid)in pipelines is widely present in many fields,such as nuclear industry,chemical industry,and petroleum transportation.Compared with single-phase flow,the density,pressure,and momentum flux in two-phase flow change greatly in the flow.When flowing through a valve,elbows,tees,and other components,a pulsating force is induced,which is termed as the“flow-induced force.”Flow-induced force causes pipeline vibration.If the vibration frequency is close to the natural frequency of the pipeline,a resonance phenomenon occurs that can further increase the vibration amplitude of the pipeline and consequently cause fatigue damage to the pipeline system.Therefore,research on flow-induced force is of great significance for the safe design and operation of pipelines.In this paper,the research progress on the mechanism,influencing factors,and calculation models of flowinduced force was reviewed.The results show that the change of momentum flux is the dominant factor in causing flow-induced force.The pressure fluctuations,pulsation of the liquid slug,and the volatile liquid wave also contribute to force fluctuation.This study aims to establish a complete theoretical system of flow-induced force mechanism that shows varying wave characteristics with different flow patterns.Most of the current studies focus on single horizontal pipe or riser pipe.With the development of deep-sea oil and gas,demand on gathering and transportation-riser pipeline systems is increased,making it a great engineering significance to study the flow-induced force in a variety of pipeline-riser systems.The empirical and theoretical models are gradually established.The ability of CFD software to simulate flow field and excitation force offers numerous advantages.Therefore,research on the accuracy of CFD software calculation results and the comparison and optimization of effective CFD calculation simulation methods will have important scientific research value for development in the future.This article comprehensively summarized the current research status of gas-liquid two-phase internal flow excitation,which can provide guidance for further related research.
作者
何兆洋
刘海潇
何利民
王丹
赫松涛
HE Zhao-yang;LIU Hai-xiao;HE Li-min;WANG Dan;HE Song-tao(College of Pipeline and Civil Engineering,China University of Petroleum,Qingdao 266580,China;Shandong Provincial Key Laboratory of Oil&Gas Storage and Transportation Safety,Qingdao 266580,China;PetroChina Pipeline Company Ltd.,Beijing 100029,China;SINOPEC Engineering Incorporation,Beijing 100101,China)
出处
《工程科学学报》
EI
CSCD
北大核心
2021年第1期129-136,共8页
Chinese Journal of Engineering
基金
国家科技重大专项资助项目(2016ZX05028-004-003)
中央高校基本科研业务费专项资助项目(15CX05006A)。
关键词
流激力
气液两相流
动量通量
实验研究
模型
计算流体力学
flow-induced force
gas-liquid flow
momentum flux
experimental study
model
computational fluid dynamics