湿天然气管道螺旋流水合物浆液安全输送研究

Hydrate Particle Spiral Flow Motion Model in Wet Natural Gas Pipeline

研究了天然气水合物浆液在气液两相螺旋管流中流动特性,分析了以气相为连续相、水合物颗粒为离散相的气固两相螺旋流的流动机理,通过对水合物颗粒受力分析和运动分析,结合螺旋流旋涡结构演化规律,推导出水合物颗粒平动、转动的判断条件,给出了颗粒各种受力的关联式,建立螺旋管流水合物颗粒运动模型,探讨了水合物颗粒的动力学行为。分析水合物浆液流动特性得到临界速度1即水合物浆液从固定床流动向悬浮流转化速度以及临界速度2即水合物浆液从移动床流动向固定床转化速度,为水合物浆液稳定流动提供了理论判据。

The flow characteristics of natrual gas hydrate slurry in gas- liquid two- phase pipeline spiral flow is studied,the flow mechanism of gas- solid two- phase pipeline spiral flow is analyzed and combined with the characteristic of velocity of spiral flow,force and kinematic analysis is carried out on the hydrate particles to set up the natural gas hydrate velocity model and judge the exercise condition of hydrate particles. The hydrate particles motion trajectory is discussed. The analysis of the flow characteristic of hydrate flow can get the critical speed 1,that is the velocity of the hydrate moved from fixed bed to suspension flow and critical speed 2,the velocity of the hydrate moved from moving bed to fixed bed,which can provide theoretical bases for the stable flowing of hydrate particles.