天然气管道射流清管器管内流场模拟及喷嘴尺寸优化

Simulation of the Flow Field in the Pipe Cleaner of the Natural Gas Pipeline and Optimization of the Nozzle Size

为了研究在清管作业时射流清管器喷管几何尺寸对管壁吹扫效果的影响,从而设计最优的射流清管器结构,有效降低下游污垢柱形成几率,本文以D273×10的天然气管道为例,建立了不同喷管入口直径、不同喷射角度、不同喷管长度的射流清管器工作模型,基于ICEM软件进行网格剖分,利用CFD软件分析射流流场特性,得到了不同几何结构条件下,下游管道固定位置的速度分布规律,确定了最优的射流清管器几何尺寸。模拟结果与工程实际经验相符合。研究结果可为射流清管器的优化设计提供理论依据。

In order to study the effect of the nozzle size of the jet pig on the purge effect of the pipe during the pigging operation,the paper designs the optimal jet pig structure to reduce the probability of downstream fouling column formation effectively,and uses D273×10 natural gas taking the pipeline as an example.The working models of jet pigs with different nozzle inlet diameters,different spray angles,and different nozzle lengths were established.Based on the ICEM software,the mesh was divided.and the characteristics of the jet flow field were analyzed using CFD software to obtain different geometries under the structural conditions and the velocity distribution law of the fixed position of the downstream pipeline.Ultimately,the paper determines the optimal geometry of the jet pig.The simulation results are consistent with the actual engineering experience.The research results can provide a theoretical basis for the optimization design of the jet pig.