过滤罐穿孔管反冲洗布水均匀性数值分析  

Numerical Analysis of the Backwashing Water-Distribution Uniformity in Perforated Pipeline of Filtering Tank

作　　者：李小畅[1,2] 陈忠喜 陈成文 古文革 房永 LI Xiaochang;CHEN Zhongxi;CHEN Chengwen;GU Wenge;FANG Yong(College of Aerospace and Civil Engineering,Harbin Engineering University;Daqing Oilfield Design Institute Co.,Ltd.)

机构地区：[1]哈尔滨工程大学航天与建筑工程学院 [2]大庆油田设计院有限公司

出　　处：《油气田地面工程》2021年第4期27-32,共6页Oil-Gas Field Surface Engineering

基　　金：国家重点研发计划深海关键技术与装备专项--小型“高能热动力系统研究”课题(2016YFC0301603);国家自然科学基金资助项目(11805044);中央高校基金面向学术前沿支持计划(3072020CFT0304)。

摘　　要：针对油田目前常用的穿孔管配水均匀性问题,采用计算流体动力学(CFD)方法对过滤罐穿孔管布水系统进行了三维流场数值模拟分析。首先以T型三通管模型实验为验证对象,明确了近壁面无量纲壁面高度y+对阻力计算结果的影响,确定了合适的数值求解方法。基于所验证的方法,对穿孔管布水系统进行了不同流量下的数值模拟,给出了布水特性,并从流场结构的角度分析局部流量不均匀的主要原因。研究结果表明:当采用RNGk-ε模型且y+在30左右时,可保证不同工况下的阻力计算结果均与实验吻合良好;穿孔管布水不均的孔眼主要出现在与配水干管两端相连的配水支管上,且主要由干管两端的大尺度漩涡及回流现象所引起;反冲洗流量对穿孔管系统本身的布水均匀性无明显影响。In order to study the problem of water distribution uniformity of perforated pipe in oil field,the three-dimensional flow field of water distribution system of perforated pipe in filter tank is numerically simulated by computational fluid dynamics(CFD)method.Firstly,this paper takes a model test of T-type pipe as the object of simulation validation,the influence of dimensionless wall height y+on the calculated results is clarified,and the appropriate numerical simulation methods are determined.Based on the validated method,the numerical simulations of the perforated pipe water distribution system under different flow rates are carried out,the water distribution characteristics are obtained,and the main reasons for the nonuniform flow rates are analyzed from the perspective of flow field structure.The results show that when the RNG K-εmodel is used and the y+is about 30,the calculated results under different working conditions are in good agreement with the experimental results.The nonuniform distribution of water in the perforated pipe mainly occurs in the branch pipe connected with both ends of the main distribution pipe and is mainly caused by the large-scale whirlpool and backflow phenomenon at both ends of the main distribution pipe.The backwash flow rate has no obvious effect on the water distribution uniformity of the perforated pipe system itself.

关 键 词：穿孔管 布水均匀性 计算流体动力学 数值模拟 

分 类 号：TE93[石油与天然气工程—石油机械设备]