摘要
水下气体喷射产生一个复杂的非稳态多相流场。为建立两相流场结构的预测方法,并揭示水下气体射流初期的流动演化和气水的相互作用,采用VOF两相流模型对水下气体喷射过程进行了数值模拟,分析了气体喷射形成的复杂流场结构。结果显示,在喷射初期,喷射形成的部分气泡在逆向涡流带动下向后翻卷;管口附近产生压力峰值区,该峰值快速衰减趋近于周围环境压力;射流过程中气液两相流场内形成了复杂的压缩和膨胀波以及涡旋运动。
Underwater gas jet produces a complex unstable multiphase flow field. For establishing the methods to predict the structure of gas flow field, and revealing the development of transient flow and interaction of gas and water.The VOF multiphase flow model was adopted to simulate the flow field of gas jet into water, the structure of flow field had been studied. The results show that some bubbles moved backward along with the reverse swirl in the early time. A peak pressure region was generated which rapidly decayed to ambient pressure arround the pipe exit. During the jet process, complex compression and expansion waves and vortex movements appeared in the two-phase flow field.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2009年第7期1132-1135,共4页
Journal of Engineering Thermophysics
基金
教育部高校博士点基金资助项目(No.20070335006)
