气液螺旋环状流界面波失稳机理

doi:10.7523/j.issn.2095-6134.2017.02.005

中国科学院大学学报 ›› 2017, Vol. 34 ›› Issue (2): 153-159.DOI: 10.7523/j.issn.2095-6134.2017.02.005

气液螺旋环状流界面波失稳机理

刘莉, 白博峰

西安交通大学动力工程多相流国家重点实验室, 西安 710049

收稿日期:2016-04-25 修回日期:2016-05-20 发布日期:2017-03-15
通讯作者: 白博峰,E-mail:bfbai@mail.xjtu.edu.cn
基金资助:
国家自然科学基金（51276140）资助

Instability mechanism of interfacial waves in swirling annular gas-liquid flow

LIU Li, BAI Bofeng

State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China

Received:2016-04-25 Revised:2016-05-20 Published:2017-03-15

摘要/Abstract

摘要： 为揭示气液螺旋环状流界面波失稳机理，基于经典的Kelvin-Helmholtz不稳定性理论，利用双流体模型，建立螺旋涡流作用下界面波的动力学模型。通过求解界面波色散方程，给出界面失稳的准则并进行理论验证。研究表明，界面波的增长特性决定于气动力、离心力和表面张力的相互作用。其中，不同气液动压相对大小条件下，离心力对界面波稳定性存在三重影响。基于此准则条件，系统分析气流速度、旋流强度及管径对界面波增长特性的影响规律。

关键词: 螺旋环状流, 界面波, K-H不稳定性, 稳定准则

Abstract: To reveal the mechanism of interfacial wave instability in swirling annular gas-liquid flow, a theoretical model for interfacial waves is established based on the Kelvin-Helmholtz instability theory and the two-fluid model. The dispersion equation is derived, and the interfacial stability criterion is obtained and verified analytically. Results indicate that the interplay of aerodynamic, centrifugal, and surface tension forces gives rise to interfacial instability. Specially, the centrifugal force acting on the interface has triple effects on the stability, depending on the relative magnitudes of gas/liquid dynamic pressures. Effects of gas velocity, swirl intensity, and cylinder curvature on the growth characteristics of the interfacial waves are examined in detail.

Key words: swirling annular flow, interfacial wave, K-H instability, stability criterion

中图分类号:

TK121

刘莉, 白博峰. 气液螺旋环状流界面波失稳机理[J]. 中国科学院大学学报, 2017, 34(2): 153-159.

LIU Li, BAI Bofeng. Instability mechanism of interfacial waves in swirling annular gas-liquid flow[J]. , 2017, 34(2): 153-159.

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气液螺旋环状流界面波失稳机理

Instability mechanism of interfacial waves in swirling annular gas-liquid flow

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