天然气减阻剂减阻机理探讨

Discussion on mechanism of drag reduction of natural gas drag reduction agent

对现有天然气减阻剂减阻机理进行了较深入的分析,重点介绍了光滑减阻、粘弹减阻和光滑-粘弹减阻机理。从微观结构分析了输气管道近壁区阻力的成因,进一步证实了输气管道近壁区是实现湍流控制和减阻增输的关键区域;从实验研究和理论研究两方面对各个减阻机理进行了评述,并列举了各减阻机理的理论依据或事实依据。此外,简要介绍了天然气减阻剂的应用条件,并提出了减阻机理的研究重点。

The existing mechanisms of drag reduction have been analyzed in depth. Smooth mechanism of drag reduction, viscoelastic mechanism of drag reduction and smooth-viscoelastic mechanism of drag reduction were presented in details. The reason of forming near wall drag of the gas pipelines were analyzed in microscopic length scale level and th6 fact that the near wall region of gas pipelines is the critical area of controlling turbulence, reducing drag and increasing gas throughput has been further confirmed. Each mechanism of drag reduction was evaluated on both experimental and theoretical studies, and the theoretical basis or factual basis of mechanism of drag reduction was also listed. In addition, the application conditions of the gas DRA were introduced briefly, and the research direction of drag reduction mechanism was pointed out.