天然气水合物输送管道气液固三相流运动特性分析

Analysis of Movement Characteristics of Gas Liquid Solid Three-phase Flow in Natural Gas Hydrate Transportation Pipeline

气液固三相流动是多相流体力学中非常重要和难以解决的问题之一。目前对于多相流的研究,重点还在于两相流,对三相湍流流动正在开展和进行中。在气液两相流流动的基础上,增加天然气水合物固相。分析固相的加入对流体压力、密度、体积等参数产生的影响,使天然气水合物的研究更加深入。在气液固三相流模拟中,通过改变天然气固体颗粒直径、密度来研究天然气水合物三相流体参数的变化,而三相流体参数的变化反过来又会影响天然气水合物的颗粒直径,在实际开发中难以达到的情况下,利用数值模拟可以具体反映二者的变化关系,为以后天然气水合物的开发提供了更精确的数值及合适的开采方案。

Gas liquid solid three phase flow is one of very important and difficult problems in multiphase fluid mechanics. The present study on multiphase flow is mainly two-phase flow; study on the three-phase turbulent flow is being carried out. In this paper, on the basis of gas-liquid two-phase flow, natural gas hydrate phase was added, effect of adding solid phase on the fluid pressure, density, volume and other parameters was analyzed. In the gas liquid solid three-phase flow simulation, by changing the solid particle diameter and density parameter, the change of natural gas hydrate three-phase fluid was studied as well as effect of three-phase flow parameters change on gas hydrate particle diameter. The numerical simulation can reflect the changes of the relationship between them, which can provide more accurate data and suitable mining plan for future development of natural gas hydrate.