Study on Visualization of Fluid Phenomena Using Neutron Radiography Technique

中子射线照相技术流体现象可视化研究

• 批准号: 02045020
• 负责人: MISHIMA Kaichiro
• 金额: $ 3.46万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for international Scientific Research
• 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-02045020/
• 关键词: neutron radiography; real-time imaging; fluid phenomena; visualization; image processing; image correction; gas-liquid two-phase flow; void fraction; 小口径円管; 京都大学研究用原子炉; ミシガン大学研究用原子炉; JRRー3; 多孔貭媒体

This research project started in FY 1990 as a joint research project between the research reactor Institute of Kyoto University and the Phoenix Memorial Laboratory of the University of Michigan, and finished in FY 1992. The purpose of the project is to investigate the feasibility of application of neutron radiography techniques to flow visualization. Particularly, electronic imaging which is one of application techniques of neutron has an advantage in visualizing fluid phenomena in a metallic duct, because it produces real-time images of the flow. Thus, in this study, electronic imaging and image processing techniques were applied to visualization and measurement of fluid phenomena in a metallic duct, nozzle or porous media.The test samples used in the experiments were air-water flows in rectangular ducts and round tubes, boiling two-phase flow in a round tube, a calibration sample for water-layer thickness vs gray level, ASTM standard sample for neutron radiography, wood metal in poro … More us media and a fuel nozzle of a jet-engine. The following facilities were used for neutron radiography experiment : Kyoto University Research Reactor (KUR), Ford Nuclear Reactor (FNR) of the University of Michigan, JRR-3 and NSRR of the Japan Atomic Energy Research Institute.From these experiments, it was revealed that electronic imaging and image processing techniques can be applied to measurement of void fraction of gas-liquid two-phase flow in addition to flow visualization. Using image processing technique, void fraction was measured for air-water flow in narrow rectangular ducts and round tubes. The results obtained by image processing were compared with the results obtained by the conventional probe method and the theoretical equation, and the comparison was good within measurement errors. It was pointed out, however, that some image corrections were needed to obtain good quantitative results. Therefore, the effect of several image corrections was also investigated quantitatively.As a result from this research project, it was revealed that neutron radiography can be applied not only to visualization of flow but also to the measurement of void fraction if combined with image processing technique. The difference of the characteristics of neutron radiography facilities was also demonstrated in this research project. Less

该研究项目作为京都大学研究堆研究所和密歇根大学菲尼克斯纪念实验室的联合研究项目于1990财政年度开始，并于1992财政年度完成。该项目的目的是研究中子照相技术应用于流动可视化的可行性。特别地，作为中子的应用技术之一的电子成像在使金属管道中的流体现象可视化方面具有优势，因为它产生流动的实时图像。因此，本研究将电子成像和图像处理技术应用于金属管道、喷嘴或多孔介质中流体现象的可视化和测量，实验中使用的测试样品为矩形管道和圆管中的空气-水流动、圆管中的沸腾两相流动、水层厚度与灰度的校准样品、ASTM中子照相标准样品、木金属在波罗 ...更多信息 美国媒体和喷气发动机的燃料喷嘴。利用京都大学研究堆（KUR）、密歇根大学福特核反应堆（FNR）、日本原子能研究所的JRR-3和NSRR等装置进行了中子照相实验，结果表明，电子成像和图像处理技术除了可以用于流场显示外，还可以用于气液两相流空隙率的测量。利用图像处理技术，测量了矩形窄缝管道和圆管内空气-水两相流的含气率。将图像处理的结果与传统探针法和理论公式的结果进行了比较，在测量误差范围内，比较结果良好。然而，有人指出，需要对图像进行一些校正，以获得良好的定量结果。本研究的结果表明，中子照相技术不仅可以用于流动的可视化，而且如果与图像处理技术相结合，还可以用于空隙率的测量。在本研究计画中，也显示出中子摄影装置特性的差异。少

项目成果

T.Hibiki et al.: "Study on Visualization of Fluid Phenomena Using Neutron Radiography Technique" the 4th World Conference on Neutron Radiography,San Francisco,USA,May,1992. (1992)

T.Hibiki 等人：“使用中子射线照相技术可视化流体现象的研究”，第四届世界中子射线照相会议，美国旧金山，1992 年 5 月。

K.MISHIMA,T.HIBIKI and H.NISHIHARA: "Some Characteristics of Gas-Linquid Flow in Narrow Rectangular Ducts" Intertional Journal of Multiphase Flow. 19. 115-124 (1993)

K.MISHIMA、T.HIBIKI 和 H.NISHIHARA：“狭窄矩形管道中气体液体流动的一些特征”国际多相流杂志。

K.Mishima, T.Hibiki and H.Nishihara: "Some Characteristics of Two-Phase Flow in Narrow Rectangular Ducts" Proc. of the International Conference on Multiphase Flows '91 - Tsukuba, September 24-27, 1991, Tsukuba, Japan. 2. 485-488 (1991)

K.Mishima、T.Hibiki 和 H.Nishihara：“窄矩形管道中两相流的一些特征”Proc。

T.HIBIKI,K.MISHIMA,K.YONEDA,S.FUJINE,K.KANDA,H.NISHUHARA,A.TSURUNO,and M.Ma subayshi: "Application of Neutron Radiography to Visualization and Void Fraction Measurement of Air-Water Flow in a Small Diameter Tube" Journal of Nuclear Science and Technology.

T.HIBIKI、K.MISHIMA、K.YONEDA、S.FUJINE、K.KANDA、H.NISHUHARA、A.TSURUNO 和 M.Ma subayshi：“中子射线照相术在空气-水流可视化和空隙率测量中的应用

S.Fujine, T.Hibiki, K.Mishima, K.Yoneda, K.Kanda, H.Nishihara, J.T.Lindsay, H.S.Fogler, and J.C.Lee: "Study on Visualization of Fluid Phenomena Using Neutron Radiography Technique" Proc. 4th World Conference on Neutron Radiography, May 10-16, 1992, San Fr

S.Fujine、T.Hibiki、K.Mishima、K.Yoneda、K.Kanda、H.Nishihara、J.T.Lindsay、H.S.Fogler 和 J.C.Lee：“使用中子射线照相技术的流体现象可视化研究”Proc。