Data base accumulation for gas-liquid two-phase flow structures based on a construction of PIV parallel computation station

基于PIV并行计算站建设的气液两相流结构数据库积累

• 批准号: 15560135
• 负责人: YAMAMOTO Fujio
• 金额: $ 2.3万
• 依托单位: University of Fukui
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15560135/
• 关键词: Flow Visualization; Image Measurement; PIV; Multiphase Flows; Gas-Liquid Two-Phase Flows; PTV; Turbulent Shear Flows; PIV-CFD Hybrid System; 気液二相乱流; 同時計測; ポストプロセッシング; 乱流計測; 実効粘性

The present research has been carried out to construct a system of PIV (Particle Image Velocimetry) as a parallel computing station, and has been applied to analyze turbulent structures in multiphase flows. As a result, the following remarks were concluded ;A. Concerning construction of PIV parallel computing station :A-1 After we developed a new hybrid system of PIV and CFD which was a combined system consisting numerical analysis technique for solving Navier Stokes equation and VGT (Velocity Gradient Tensor technique for PTV, it was confirmed that the hybrid system could compute the pressure field around a Savonius type of wind turbine.A-2 Bubble-bubble interaction in bubbly flows were discussed with 3-D PTV. It was made clear that attractive forces were acted in the vertical direction and exclusive forces were acted in the horizontal direction.A-3 A new inverse analysis has been devised and applied to bubbly flows at high void fraction, and then a new technique for computing liquid … More phase flow field from PIV/PTV measurement using the inverse analysis has been developed.B. Concerning analysis of turbulent structure of gas-liquid two-phase flows :B-1 A new system for synchronizing a high speed high resolution vide camera and a shear stress sensor was constructed, and the friction drag modification mechanisms in wall sliding bubbly flows were elucidated with PIV measurement results.B-2 Effective viscosity, turbulent flow characteristics and additional viscosity were discussed in Taylor-Couette bubbly flows in a gap between coaxial double circular cylinders, and then the transition phenomenon from ring vortex to spiral vortex was visualized and discussed.B-3 Reynolds stress distribution in boundary layers of gas-liquid two-phase flows close to the flat wall was measured using a new shallow focal PTV system, and consequently the relation between Reynolds stress and friction drag reduction in the boundary layer of the two-phase flow was discussed.B-4 In order to elucidate the turbulent structures of bubbly flows and slug flows in a helical coil tube, a new CT image measurement system was developed. As a result, formation of secondary flows due to the centrifugal force effects on the two-phase flows and bubble distribution were newly found and discussed.All the above results were published as 25 papers in the academic journals described in the references Less

目前的研究工作是构建一个PIV（粒子图像测速）系统作为并行计算站，并应用于分析多相流中的湍流结构。因此，得出以下评论：A．关于 PIV 并行计算站的建设：A-1 我们开发了一种新型 PIV 和 CFD 混合系统，该系统是一个由求解 Navier Stokes 方程的数值分析技术和 VGT（PTV 速度梯度张量技术）组成的组合系统，并证实该混合系统可以计算 Savonius 型风力涡轮机周围的压力场。A-2 气泡流中的气泡-气泡相互作用 与 3-D PTV 进行了讨论。明确了吸引力作用在垂直方向，排他力作用在水平方向。A-3 设计了一种新的反演分析并将其应用于高空隙率的气泡流，然后开发了一种使用反演分析从 PIV/PTV 测量计算液体相流场的新技术。B.关于气液两相湍流结构的分析 流动：B-1 构建了一种同步高速高分辨率视频相机和剪切应力传感器的新系统，并利用 PIV 测量结果阐明了壁面滑动气泡流中的摩擦阻力修改机制。B-2 讨论了同轴双圆柱间隙中泰勒-库埃特气泡流的有效粘度、湍流特性和附加粘度，然后进行了过渡 B-3 利用新型浅焦点PTV系统测量了气液两相流靠近平壁的边界层雷诺应力分布，从而讨论了两相流边界层雷诺应力与摩阻减阻的关系。B-4 为了阐明气泡的湍流结构 针对螺旋盘管中的流动和段塞流，开发了一种新型 CT 图像测量系统。由此，新发现并讨论了由于离心力对两相流影响而形成二次流以及气泡分布的问题。以上结果均以25篇论文的形式发表在参考文献中所述的学术期刊上。 Less

项目成果

Precision of direct measurement of vorticity from digital particle image

数字粒子图像直接测量涡度的精度

• 期刊: Meas. Sci. Technol.
• 作者: X. Ruan;F. Wu;F. Yamamoto
• 通讯作者: F. Yamamoto

Estimation of the liquid velocity field in two-phase flows using inverse analysis and particle tracking velocimetry

使用逆分析和粒子跟踪测速法估计两相流中的液体速度场

• 发表时间: 2005
• 期刊: Flow Measurement and Instrumentation Vol.16
• 作者: Cheng;W.;Murai;Y.;Yamamoto;F.
• 通讯作者: F.

低レイノルズ数域における内接形トロコイドギアポンプの内部流動(3次元数値シミュレーションによるポンプ特性の評価)

低雷诺数区域内摆线齿轮泵的内部流动（通过三维数值模拟评估泵特性）

• 发表时间: 2004
• 期刊: 日本機械学会論文集(B編) 70巻・695号
• 作者: Cheng;W.;Shingo Matsuyama;芦原 将彰;Shingo Matsuyama;Wen Cheng;Toshiyuki Suzuki;笹木俊男;Shingo Matsuyama;太田淳一;Toshiyuki Suzuki;村井祐一
• 通讯作者: 村井祐一

EXPERIMENTAL AND NUMERICAL SIMULATION OF THREE-PHASE FLOW IN AN AERATION TANK

• 发表时间: 2003
• 作者: Chengwen;ZhouXiao-de;SongCe;Mintao;MuraiYuichi;YamamotoFujio

Visualization of internal flow in an inscribed trochoidal gear pump

内接摆线齿轮泵内部流动的可视化

• 发表时间: 2006
• 期刊: Transactions of the Visualization Society of Japan Vol.26, No.4
• 作者: Itoh;T.;Murai;Y.;Ueno;Y.;Oiwa;H.;Miyagi;N.;Yamamoto;F.
• 通讯作者: F.