摘要：Decaying swirling flow is widely utilized in multiphase flow devices for separation, stabilization and heat transfer enhancement. In this paper, based on the image processing technique, the decay law and swirl length of swirling gas-liquid flow induced by a vane-type swirler in a vertical pipe is experimentally and theoretically studied. According to the visual observation, four swirling flow patterns including chain, swirling gas-column, swirling intermittent and swirling annular flow are recognized at the swirler outlet. Due to swirl decay, the chain, swirling intermittent and swirling annular flow revert to inlet non-swirling flows downstream of the swirler, whereas the swirling gas-column flow transforms to slug flow rather than inlet bubble flow. The swirl length of swirling gas-column and swirling intermittent flow increases with liquid superficial velocity increasing or gas superficial velocity decreasing. By contrast, the swirling annular flow exhibits a reverse trend. Based on the theory of angular momentum and the parameter of two-phase swirl number, comprehensive decay models are proposed to predict the swirl length of various swirling flow patterns. The prediction is correlated reasonably well with the experimental data within ±25% deviation in varied flow conditions.
© 2021

ISSN号：0301-9322

卷、期、页：v 137,

发表日期：2021-04-01

影响因子：3.083100

期刊分区（SCI为中科院分区）：三区

收录情况：SCIE（科学引文索引网络版）

发表期刊名称：International Journal of Multiphase Flow

参与作者：刘莉,张嘉荣,刘帅,顾汉洋

第一作者：王科

论文类型：期刊论文

论文概要：刘莉,张嘉荣,刘帅,王科,顾汉洋，Decay law and swirl length of swirling gas-liquid flow in a vertical pipe，International Journal of Multiphase Flow，2021，v 137,

论文题目：Decay law and swirl length of swirling gas-liquid flow in a vertical pipe