THREE-DIMENSIONAL PTV MEASUREMENT OF MIXING FLOW BY BUBBLING JET IN A CYLINDRICAL VESSEL

圆柱容器内鼓泡喷射混合流的三维 PTV 测量

• 批准号: 02650484
• 负责人: UEMURA Tomomasa
• 金额: $ 1.41万
• 依托单位: OSAKA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02650484/
• 关键词: Image processing; Three-dimensional PTV; Three-dimensional PIV; Binary Image Correlation Method; Velocity Measurement; Mixing flow; Water model; Injection Metallurgy; 三次元PTV; 三次元速度分布; 流れの可視化; 底吹き気泡攪拌; 攪拌流れ; 画像解析; 2値化相関法; 気泡撹拌; ガス吹き込み; 気泡噴

This project aims to measure three-dimensional motion and paths of fluid elements in a cylindrical water bath into which a bubbling jet is blown from the center of the bottom. Main effort is paid to develop a new efficient three-dimensional PTV method which can work on a personal computer system with a practical performance. In order to measure three-dimensional velocity vectors efficiently using a personal computer system, following three algorithms are newly developed:1) Measuring method of three-dimensional co-ordinates of tracer particles.2) A method for compensating the influence of refraction at the air-water boundary.3) Algorithm of three-dimensional binary-image correlation method.A two-camera-stereo system is planned for measuring three-dimensional co-ordinates of tracer particles at first, but it is found that the system is not reliable enough to determine stereo-pairs from a pair of pictures which contain more than 50 tracers. Then three-camera system is developed to satisfy the requested performance. Results of some preliminary experiments show satisfactorily performances of the measuring system.

该项目旨在测量圆柱形水浴中流体元素的三维运动和路径，其中从底部中心吹入冒泡射流。本文的主要工作是开发一种新的、高效的、能在个人计算机系统上运行并具有实际性能的三维PTV方法。为了利用个人计算机系统有效地测量三维速度矢量，本文提出了以下三种算法：1)示踪粒子三维坐标测量方法。一种补偿空气-水边界处折射影响的方法。3)三维二值图像相关算法。最初计划用双相机立体系统测量示踪粒子的三维坐标，但发现该系统不够可靠，无法从包含50多个示踪粒子的一对图片中确定立体对。然后开发了三摄像头系统，以满足要求的性能。初步实验结果表明，该测量系统具有良好的性能。

项目成果

植村 知正,井口 学,山本 富士夫,水越 渉,森田 善一郎.: ""水ー空気系底吹き気泡噴流により撹拌される円筒容器内流れの画象計測"" 鉄と鋼. 78ー5. (1992)

Tomomasa Uemura、Manabu Iguchi、Fujio Yamamoto、Wataru Mizukoshi、Zenichiro Morita.：“水-空气系统中由底吹气泡射流搅拌的圆柱形容器中的流动的图像测量”Tetsu-to-Hagane 78-5。 (1992))

T. Uemura, M. Iguchi, F. Yamamoto, W. Mizukoshi, and Z. Morita: "Video Image Analysis of Mixing Flow in a Cylindrical Vessel Agitated by a Bottom Blowing Bubbling Jet" J. Iron and Steel Inst. Japan. vol.78. 738-744 (1992)

T. Uemura、M. Iguchi、F. Yamamoto、W. Mizukoshi 和 Z. Morita：“底吹鼓泡射流搅拌的圆柱形容器中混合流的视频图像分析” J. Iron and Steel Inst.

T.Uemura,K.Ohmi et al.: "Mixing flow in a Cylindrical Vessel agitated by a bubbling jet." Proceedings of Fifth Application of Laser Techniques to Fluid Mechanics. 18-6 (1990)

T.Uemura、K.Ohmi 等人：“由鼓泡射流搅拌的圆柱形容器中的混合流。”

T. Uemura, F. Yamamoto, and M. Iguchi: "New 3D-PTV Algorithms Based on Correlation Between Binary Images" Proc. 6th Intl. Symp. Flow Visualization. 817-821 (1992)

T. Uemura、F. Yamamoto 和 M. Iguchi：“基于二进制图像之间相关性的新 3D-PTV 算法”Proc。

植村 知正,井口 学,山本 富士夫,水越 渉 ほか: "水-空気系底吹き気泡噴流により撹拌される円筒容器内流れの画像計測." 鉄と鋼. 78. 738-744 (1992)

Tomomasa Uemura、Manabu Iguchi、Fujio Yamamoto、Wataru Mizukoshi 等人：“水-空气系统中底吹气泡射流搅拌的圆柱形容器内的流动的图像测量”78. 738-744。 (1992)