Development of Automatic measurement system of the instantaneous 3-dimensional flow field by using PIV and MASCON model

利用PIV和MASCON模型开发瞬时三维流场自动测量系统

• 批准号: 07555451
• 负责人: IKEDA Syusuke
• 金额: $ 1.15万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555451/
• 关键词: 3 dimensional instantaneous structure; picture processing; PIV; MASCON model; organized vortices; honami; PIV; マスコンモデル; 流れの三次元瞬間像; 可視化; 相関解析; 仮想荷重法; 三次元組織渦; LES乱流モデル

An advanced technique using PIV and MASCON model was developed to measure the instantaneous 3-dimensional flow field above flexible water plant. The measurement reveal that organized vortices are generated intermittently above the vegetation. A side view of the vortex shows an elliptical shape, and the part of the 3-dimensional structure above the vegetation layr consists of a pair of vortices inclined downward toward the front. The period of the vortex generated is explained in terms of linear stability analysis of flows with an inflectional velocity profile. The wavy motion of flexible vegetation is induced by movement of such organized vortices. The instantaneous flow field was visualized by using Application Visualization System effectively. It was confirmed that the technique developed in this study is a powerful tool to measure the 3-dimansional and unsteady flow field.To obtain the transport of fluid momentum and sensible heat induced by the organized vortices above the flexible plant, a field observation was conducted at a reed field. The observation suggests that the organized vortices are the major agency for exchange of fluid momentum, heat and other substance between in and above plant canopy.

采用PIV技术和MASCON模型相结合的方法对柔性水厂上方的三维流场进行了实时测量。测量结果表明，有组织的漩涡间歇性地产生以上的植被。从侧面观察，该涡旋呈椭圆形，植被层上方的三维结构由一对向下朝前倾斜的涡旋组成。产生的旋涡的周期解释的线性稳定性分析的流动与弯曲的速度剖面。柔性植被的波浪运动是由这种有组织的漩涡运动引起的。应用可视化系统有效地实现了瞬时流场的可视化。为了获得柔性植物上方有组织涡引起的流体动量和显热的输送，在芦苇场进行了现场观测。观察表明，有组织的涡旋是植物冠层内和冠层上流体动量、热量和其他物质交换的主要机构。

项目成果

Syusuke IKEDA: "Field observation and spectral analysis on honami in reed field" Journal of Hydraulic, Coastal and Environmental Engineering (JSCE). No.551, II-37. 11-20 (1996)

池田周介：“芦苇田中的honami的实地观察和光谱分析”水利、海岸和环境工程学报（JSCE）。

Syunsuke IKEDA: "An observational study on turbulent flow within and above plant canopy and transport of sensible heat and fluid momentum" Journal of Japan Society of Hydrology and Water Resouces. Vol.9, No.6. 520-527 (1996)

池田俊介（Syunsuke IKEDA）：“植物冠层内部和上方的湍流以及显热和流体动量传输的观测研究”日本水文水资源学会杂志。

Syusuke IKEDA: "Study on generation of honami in terms of spectral analysis" Journal of Hydraulic, Coastal and Environmental Engineering (JSCE). No.539, II-35. 43-52 (1996)

池田周介：“通过光谱分析研究 honami 的生成”水利、海岸和环境工程学报 (JSCE)。

池田駿介: "スペクトル応答解析による穂波の成因に関する研究" 土木学会論文集. 539・II-35. 43-52 (1996)

Shunsuke Ikeda：“利用频谱响应分析研究耳波的起源”日本土木工程师学会会议记录 539・II-35（1996）。

Syusuke IKEDA: "Three-dimensional organized vortices above flexible plants" Journal of Hydraulic Engineering (ASCE). 122.11. 634-640 (1996)

Syusuke IKEDA：“柔性植物上方的三维组织涡流”水利工程学报 (ASCE)。