不同风速下拉索表面水线的形成

Formation of Rivulets on Cable Surface Under Different Wind Speeds

本文将气液两相流理论与VOF法相结合,提出一种模拟风雨条件下斜拉索表面水线产生过程的新方法;采用计算流体软件CFX进行数值模拟,通过分析重力及气流单独作用下的水线形态,并与前人的研究成果进行比对,验证了这一方法的准确性与合理性;通过研究不同风速条件下受重力和气流共同作用时的水线初始形成时间、位置和形态,分析重力和气流作用对水线形成的影响,为人工水线风洞试验和理论分析提供依据.

A new method for simulating the evolution of rivulets on stay cable surface is presented by combining gasliquid two-phase flow theory and volume of fluid （VOF） method. To verify the veracity and rationality of this method, the evolutions of rivulets under gravity and airflow were studied, respectively, by computational fluid dynamics （CFD） software CFX. Through investigating the initial time of rivulet formation, rivulet location and morphology under different wind speeds and gravity, the effects of gravity and airflow on rivulet formation are analysed, which can provide the basis for wind tunnel tests with artificial rainfall and theoretical analysis.