不同重力下90°弯管内气液两相流流型及流动特性研究

刘赵淼; 刘佳; 申峰

doi:10.6052/0459-1879-14-264

不同重力下90°弯管内气液两相流流型及流动特性研究

doi: 10.6052/0459-1879-14-264

北京工业大学机械工程与应用技术学院, 北京100124

详细信息

通讯作者:
刘赵淼,教授,主要研究方向:微流体力学、计算流体力学、流固耦合分析.E-mail:lzm@bjut.edu.cn

中图分类号: V211.1⁺7
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出版历程
- 收稿日期: 2014-09-03
- 修回日期: 2014-12-09
- 刊出日期: 2015-03-18

SIMULATION ON FLOW PATTERNS AND CHARACTERISTICS OF TWO-PHASE GAS-LIQUID FLOW IN A 90° BEND UNDER DIFFERENT GRAVITY

College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China

摘要

摘要: 研究了不同重力条件下90°弯管内气液两相流流型分布形态及流动特性. 通过建立90°弯管内气液两相流流动的三维数学物理模型,采用VOF 方法,对10^-6g₀, 10^-4g₀, 10^-2g₀, 1g₀ (g₀= 9.8m/s²) 重力下的90°弯管内气液两相流流型分布特征、截面空隙率、滑速比及气相尾部最大斜向角进行了比较分析. 研究结果表明:所建立的模型能够正确模拟不同重力条件下90°弯管内气液两相流流型和截面空隙率,并得到气液两相弯管二次流与单相二次流的不同特性. 随着重力水平的提高,90°弯管对气相流型的影响作用减弱,气相整体向弯管内侧积聚靠拢,弯管对尾部的斜向作用减弱.
- 不同重力条件 /
- 90°弯管 /
- 气液两相流 /
- 截面空隙率 /
- 斜向角
Abstract: The flow patterns and characteristics of two-phase gas-liquid flow in a 90° bend under different gravity were simulated. Based on the VOF (Volume of Fluid) method, a three-dimensional mathematical model of two-phase gas-liquid flow in a 90° bend tube was established to analyze the distribution of flow pattern, the cross-sectional void fraction, the slip ratio and the maximum skew angle in tail of the gas phase in a 90° bend under varied gravities of 10^-6g₀, 10^-4g₀, 10^-2g₀ and 1g₀ (g₀ = 9.8m/s²). It is shown that the effects of flow patterns and cross-section void fraction of gas-liquid two-phase flow under varied gravity conditions can be correctly analyzed by the developed model and the difference of secondary flow is obtained between the gas-liquid two-phase bend flow and the single-phase flow. With the increasing of gravity level, that the gas phase is accumulated to the inside of the 90° bend makes the effect of 90° bend on the gas phase flow and the oblique effect the 90° bend to the tail get weaken.
- different gravity /
- 90° bend /
- gas-liquid two-phase flow /
- cross-sectional void fraction /
- skew angle

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参考文献(27)

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