A study on the bubble accumulation and coalescence phenomena in liquid and gas two-phase flow

液气两相流中气泡聚集与聚结现象的研究

• 批准号: 20560774
• 负责人: SHEN Xiuzhong
• 金额: $ 2.91万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20560774/
• 关键词: 熱流動・構造; 気液二相流の流動現象; 多次元気液二相流; 流れ誘起の気泡成長; 多センサープローブ; 熱線流速計; 界面輸送モデル; レイノルズ応力; 乱流モデル; ドリフトフラックスモデル; 流れ誘起の気泡集積

In this study, local measurements for the bubble accumulation and coalescence phenomena in a liquid-gas two-phase flow in a large diameter pipe were performed on flow parameters, such as void fraction, interfacial area concentration, bubble size, gas velocity, liquid velocity and turbulence intensity by using the local sensor techniques such as optical multi-sensor probes and hot-film probes and a database for the local flow parameters has been established. The experiment results show that the phenomenon can be attributed to the formation and development of large bubbles of pipe size. Based on the database, a drift flux model was newly developed for the flow evolving from bubbly to slug flows. The bubble accumulation and coalescence phenomena were numerically analyzed by using the one-dimensional two-fluid model with its interfacial drag model modified by including the present newly developed drift flux model. The numerical calculation predicted well the bubble accumulation and coalescence phenomena observed in the present experiments.

In this study, local measurements for the bubble accumulation and coalescence phenomena in a liquid-gas two-phase flow in a large diameter pipe were performed on flow parameters, such as void fraction, interfacial area concentration, bubble size, gas velocity, liquid velocity and turbulence intensity by using the local sensor techniques such as optical multi-sensor probes and hot-film probes and a database for the local已经建立了流参数。实验结果表明，该现象可以归因于管道尺寸大气泡的形成和发展。基于数据库，新开发了从气泡到sl弹性流动的流动通量模型。通过使用一维的两流体模型和其界面阻力模型通过包括当前新开发的漂流通量模型修饰的界面阻力模型，通过使用一维的两流体模型来分析气泡的积累和合并现象。数值计算很好地预测了在本实验中观察到的气泡积累和结合现象。

项目成果

Flow-induced void fraction transition phenomenon in two-phase flow

两相流中流动引起的空隙率转变现象

• 发表时间: 2010
• 作者: Q.Xu;X.Z.Cao;K.Sato;T.Iwai;T.Yoshiie.;沈秀中
• 通讯作者: 沈秀中

A method for measuring local instantaneous interfacial velocity vector in multi-dimensional two-phase flow

• DOI: 10.1016/j.ijmultiphaseflow.2007.11.006
• 发表时间: 2008-05
• 期刊: International Journal of Multiphase Flow
• 影响因子: 3.8
• 作者: Xiuzhong Shen;K. Mishima;H. Nakamura

Axial Development of Gas-Liquid Flow Parameters in a Narrow Rectangular Channel

窄矩形通道内气液流动参数的轴向展开

• 发表时间: 2010
• 作者: T.Satoh;M.Koka;A.Yokoyama;T.Kamiya;N.Kozai;沈秀中
• 通讯作者: 沈秀中

Experimental Study of Two Phase Flow in a Large Diameter Vertical Pipe Using Hot-Film Anemometer

大直径垂直管道内两相流热膜风速计实验研究

• 发表时间: 2008
• 作者: Matsui;Ryota
• 通讯作者: Ryota

Shape measurement of bubble in a liquid metal, Nuclear Instruments and Methods in Physics Research Section A : Accelerators, Spectrometers

液态金属中气泡的形状测量，物理研究中的核仪器和方法 A 部分：加速器、光谱仪

• 发表时间: 2009
• 期刊: Detectors and Associated Equipment Vol.605, No.1-2
• 作者: Saito Yasushi;Shen Xiuzhong;Mishima Kaichiro;Matsubayashi Masahito
• 通讯作者: Matsubayashi Masahito