摘要
考虑到深井、超深井中井底围压对射流流场有一定的影响 ,建立了井底受限射流流场的物理模型。采用k ε模型 ,并对模型的主要系数进行了优选 ,用有限元方法对围压条件下井底受限射流的流场进行了数值模拟。给出了高围压条件下射流轴心动压力、径向速度和轴心线上湍流动能等流场参数分布 ,并与零围压条件下淹没自由射流的参数进行了比较 ,得出了高围压条件下受限射流轴心动压力衰减规律的数学模式 ,进一步完善了钻井水力参数设计的理论和方法。
In order to explore the effect of ambient pressure on jet flow field in deep well and ultra-deep well, a physical model for flow field of confined water jet at bottom hole was established. The numerical simulation of the jet flow field was conducted with finite element method and k-ε two-equation model, in which the main constants were optimized. The results show that there are differences of the parameters of the jet flow field between high ambient pressure and without ambient pressure, such as the jet pressure on jet centerline, the radial velocity on jet section and the turbulent kinetic energy. A mathematical model for describing jet pressure attenuation on the jet center line at high ambient pressure was provided.
出处
《石油大学学报（自然科学版）》
EI
CSCD
北大核心
2003年第5期36-38,共3页
Journal of the University of Petroleum,China(Edition of Natural Science)
关键词
井底
数值模拟
流体流场
围压
受限射流
κ-ε模型
有限元法
钻井技术
bottom hole
fluid flow field
ambient pressure
confined jet
k-ε model
finite element method
numerical simulation
