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.

本研究利用光学多传感器探头和热膜探头等局部传感器技术，对大直径管道中液气两相流中气泡积聚和聚并现象进行了局部测量，包括空隙率、界面面积浓度、气泡大小、气速、液速和湍流强度等流动参数，并建立了局部流动参数数据库。实验结果表明，这种现象可归因于管道大小的大气泡的形成和发展。在此基础上，建立了气泡流向段塞流演化的漂移通量模型。采用一维双流体模型对气泡聚集和聚并现象进行了数值分析，并对其界面阻力模型进行了修正，引入了新建立的漂移通量模型。数值计算较好地预测了实验中观察到的气泡聚集和聚并现象。

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

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

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

ホームページ等。

主页等

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