Development of Three Dimensional Velocity Measurement System by Making Use of Flow Visualization and Numerical Techniques

利用流动可视化和数值技术开发三维速度测量系统

• 批准号: 63850098
• 负责人: MORI Kazu-hiro
• 金额: $ 5.18万
• 依托单位: Hiroshima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research
• 财政年份: 1988
• 资助国家: 日本
• 起止时间: 1988 至 1990
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-63850098/
• 关键词: 3-dimensional flow field; Hydrogen bubble; Image processing; Laser Light Sheet; Tracing of streak line; Variational method; Wake; Correlation Method; 船尾伴流; 3次元画像計測; 階調性画像; 面内流速場; 特徴抽出; 相互相関; 変分法を用いた反復解法; 画像処理; 3次元流場; 数値流体力学

A hybrid method is developed to measure 3-dimensional flows where the image processing method and numerical computational method are complementarily used.The visualization system consists of hydrogen bubble method and laser light sheet. The 3-dimensional velocity fields are measured by using the image digitizing through image processing techniques. It is found that an image by hydrogen bubble method is not always adequate for digital processing.To have more accurate plane flow, a new method to trace streaklines and to identificate intensity profile of the streakline is studied. This method can provide more efficient and accurate plane velocity fields than the particle tracing method.The 3-dimensional reproduction system is developed for the several scanned plane flows to satisfy the continuity condition. The variational method is used for the reproduction alcuration. The present system is applied to the measurement of the wake flow of the Wigley model to examine of the method works well when the measured plane flow components are supplied with sufficient accuracy.

提出了一种三维流动测量的混合方法，该方法将图像处理方法和数值计算方法相结合，可视化系统由氢气泡法和激光片光法组成。通过图像处理技术将图像数字化，测量了三维速度场。为了得到更精确的平面流场，本文研究了一种新的跟踪条纹线和识别条纹线强度剖面的方法。该方法比粒子追踪法更有效、更精确地提供了平面速度场，并为满足连续性条件，开发了一个平面流场三维再现系统。用变分法进行了再现计算。将该系统应用于Wigley模型尾流的测量，验证了该方法在提供足够精度的平面流分量时的有效性。

项目成果

Kazu-hiro Mori,Shinji Ninomiya:"Development of a new velocity measurement system by using computerized flow visualization and numerical method." 5th International Conference of Numerical Ship Hydrodynamics. 2. (1989)

Kazu-hiro Mori、Shinji Ninomiya：“利用计算机流可视化和数值方法开发新的速度测量系统。”

二宮 伸治: "流脈輝度分布波形の特徴抽出処理による面内流場の流速計測" 日本造船学会(平成3年春季)講演論文集.

Shinji Ninomiya：“通过静脉亮度分布波形的特征提取处理来测量面内流场中的流速”，日本造船学会论文集（1991 年春季）。

茂里 一紘,土井 康明,二宮 伸治: "流れの可視化、画像処理と数値計算を併用した方法による3次元流場の計測" 流れの可視化学会論文集、Vol.9 No.34. 1. 75-88 (1989)

Kazuhiro Shirisato、Yasuaki Doi、Shinji Ninomiya：“使用图像处理和数值计算相结合的方法实现流动的可视化和三维流场的测量”，流动可视化学会论文集，第 9 卷第 1. 75 期。 -88 (1989)

Shinji Ninomiya, Kazu-hiro Mori: "A Method to Measure Plane Flow Velocity by Processing Visualized Intensity Distribution Profiles of Streaklines" J. of the Society of Naval Architects of Japan. 169. 39-45 (1991)

Shinji Ninomiya、Kazu-hiro Mori：“通过处理可视化的条纹强度分布剖面来测量平面流速的方法”，日本造船学会杂志。

茂里一紘: Proc.of 5th International Conference on Numerical Ship Hydrodynamics. (1989)

Kazuhiro Morisato：第五届国际船舶流体力学会议记录（1989）。