基于正交试验设计的水合物浆液流动特性数值模拟

 针对竖直管道内水合物浆液输送过程中的流动问题，以浆液流速、水合物颗粒粒径和水合物颗粒体积分数作为影响浆液流动特性的主要因素，以水合物浆液在管道输送过程中的压降为评价指标，对水合物浆液在竖直弯管中的流动进行了正交试验设计，并在正交试验设计的基础上运用CFD软件模拟了浆液在管道中的流动情况。结果表明，在浆液输送过程中，输送速度对压降的影响最大，随着输送速度的增加，压降损失也随之增大；颗粒的粒径对压降的影响次之，水合物颗粒的粒径越小对压降的影响越大，随着粒径的增大，压降损失趋于平缓；水合物颗粒体积分数对压降的影响最小，随着水合物颗粒体积分数的增加，压降逐渐减小。通过对试验结果的进一步分析，给出了该试验条件下水合物浆液在管道输送较优的方案。

Numerical Simulation of Hydrate Slurry Flow Based on Orthogonal Design

The pressure drop of the hydrate slurry in a pipeline is mainly related to the following factors: The velocity of hydrate slurry, the size of the solid phase and the volume fraction of the hydrate. In order to study the characteristics of hydrate slurry transportation in the vertical pipeline, the three parameters are chosen as the design factors and the pressure drop as the evaluation index in the orthogonal test. The numerical simulation reveals that the velocity of the hydrate slurry has the greatest effect on the pressure drop, while the influence of the solid phase takes in the second place and the volume fraction of the hydrate the least. At last, a more favorable delivery scheme is proposed based on the analysis above.