Numerical Simulation Analysis of CLSM Slurry Filling Pipeline

管道运输是石油的主要运输方式，它的安全性和环保一直是人们所关心的问题。为合理废弃地下油气管道，确保可持续发展，本文以CLSM为主要研究对象，采用计算流体动力学软件，对CLSM浆体在管内的流体动力学特性进行数值仿真。在水平方向上，浆液在水流方向上是一种稳定的分层流流态，但在入口附近的某一区域会有不稳定的流动。在管径不变的情况下，随着流量的增加，核心半径逐渐变小，核心流速逐渐增加，单位长度内的流阻显著增加。与采用流变试验和考虑壁面滑移作用的灌输阻力分析方法进行比较，得出的最大相对误差小于10%。通过对CLSM技术中浆体填充管道的流动特性进行了研究，为其在实际工程中的应用奠定了理论基础。Pipeline transportation is the main mode of oil transportation, and its safety and environmental protection have always been issues of concern. To rationally abandon underground oil and gas pipelines, and ensure sustainable development, this paper takes CLSM as the main research object and uses computational fluid dynamics software to numerically simulate the fluid dynamic characteristics of CLSM slurry in the pipe. In the horizontal direction, the slurry is a stable stratified flow state in the flow direction of water, but there is an unstable flow in a certain area near the inlet. Under the condition of constant pipe diameter, with the increase of flow rate, the core radius gradually decreases, the core flow velocity gradually increases, and the flow resistance per unit length significantly increases. Compared with the pipeline resistance analysis method using rheological tests and considering the wall slip effect, the maximum relative error obtained is less than 10%. Through the study of the flow characteristics of the slurry filling the pipeline in the CLSM technology, a theoretical basis has been laid for its application in actual engineering.