【摘要】 针对弯管系统中易在弯头处出现水合物堵塞的现象,以弯管系统中水合物浆液输送过程为研究对象,通过数值模拟对影响弯管系统中水合物颗粒最大体积分数的2个因素(颗粒直径、管径)进行了分析。结果表明:当水合物浆流速较小时,弯管系统中水合物最大体积分数受粒径的影响较大,即随着粒径的增大,水合物的最大体积分数趋近迅速增大的状态,而当浆液流速较快时,水合物最大体积分数受流速影响较大;管径的增大可以减小水合物颗粒直径对弯管系统中水合物最大体积分数的影响,到管道直径达到200 mm时,水合物颗粒直径的变化几乎不会影响水合物最大体积分数。研究结果为水合物浆液混输领域的发展提供理论依据。更多还原

【Abstract】 In view of the phenomenon that hydrate blockage occurs easily in elbow system,taking the hydrate slurry transport process in the elbow system as the research object,the two factors( particle diameter and diameter) that affect the maximum volume fraction of hydrate particles in the system were analyzed by numerical simulation. The results showed that: When slurry flow rate is small,the hydrate maximum volume fraction in the elbow system is largely influenced by the particle size. In another word,with the increase of particle size,the maximum volume fraction of hydrate increases rapidly; when slurry flow rate is faster,the volume fraction of hydrate is mainly influenced by velocity; The increase of tube diameter can reduce the influence of hydrate particle diameter on the maximum volume fraction of hydrate in pipe bending system. When the diameter of pipe is 200 mm,the change of hydrate particle diameter has little effect on the maximum volume fraction of hydrate. The results can provide a theoretical basis for the development of hydrate slurry transportation.更多还原