摘要：Swirling gas-liquid flow has a wide variety of engineering applications in petroleum, chemical, and nuclear industries. A fundamental understanding of swirling flow patterns and their transitions is essential for the proper modelling of pressure drop, mass transfer rate and interfacial area in swirling two-phase flow. Although the gas-liquid flows in straight pipes have been widely studied, little attention has been paid to characteristics at transition boundary of swirling gas-liquid flow. In this paper, based on high-speed camera method using back light source, flow patterns and transition criteria for swirling gas-liquid flow induced by a vane-type swirler were experimentally investigated in a vertical tube of 30 mm I.D., operating at ambient temperature and pressure. According to our observation, five typical flow patterns, i.e. swirling gas column flow, swirling intermittent flow, swirling annular flow, slug flow and churn flow, were identified and the detailed characteristics at the transition boundaries were discussed with flow-regime reconstruction technique. The spatial and temporal evolution of the gas core diameter in swirling flow regimes were also analyzed using image processing technique. Additionally, the flow-regime transition criteria were gained which reveal that the void fraction αg in swirling gas column flow is below 0.30∼0.32 and it attains values of 0.32 to 0.71 in the swirling intermittent flow. When αg is greater than 0.71∼0.74, the swirling intermittent flow transforms into swirling annular flow.
© 2019

ISSN号：0301-9322

卷、期、页：v 122,

发表日期：2020-01-01

影响因子：3.083100

期刊分区（SCI为中科院分区）：三区

收录情况：EI（工程索引）

发表期刊名称：International Journal of Multiphase Flow

参与作者：刘莉,白博峰

第一作者：王科

论文类型：期刊论文

论文概要：刘莉,王科,白博峰，Experimental study on flow patterns and transition criteria for vertical swirling gas-liquid flow，International Journal of Multiphase Flow，2020，v 122,

论文题目：Experimental study on flow patterns and transition criteria for vertical swirling gas-liquid flow