表面活性剂水溶液的减阻机理分析

Analysis on Drag Reduction Mechanism of Aqueous Solution with Surfactant Additives

为探讨表面活性剂水溶液的减阻机理,介绍了表面活性剂减阻特点,评述各减阻机理假说,提出确保入口段长度,对基于PIV及LDV流场测试技术揭示表面活性剂减阻水溶液流的紊流结构和水动力学机理的重要性,指出准确测定剪切诱导状态的形成时间和松弛时间对确定形成充分发展紊流所需入口段距离的必要性。

To explore the drag-reducing mechanism of turbulent water flow with surfactant additives, the drag-reducing features of surfactants are intruduced and hypotheses for the drag reduction mechanism are reviewed. It is indicated that based on LDV and PIV, the appropriate entrance length is important for revealing the turbulent structure and hydrodynamic mechanism of surfactant drag-reducing water flow, and exact measurement of forming time and relaxation time of shear-induced state is necessary for determining the entrance length for creating the full-developed turbulent flow.