Development of neutron radiography techniques to measure velocities of particles and fluid in a spouted bed

开发中子射线照相技术来测量喷动床中颗粒和流体的速度

• 批准号: 02555188
• 负责人: OGINO Fumimaru
• 金额: $ 3.26万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02555188/
• 关键词: Neutron Radiography; Spouted Bed; Flow Visualization; Liquid-Solid Two Phase Flow

Motion of solid particles in a spouted bed was visualized by using neutron radiography (real time TV). Trajectories and velocity profiles of particles in annular region were obtained from the radiography.Result indicates that both the trajectory and radial profile of particle velocity normalized by mean velocity through nozzle are almost independent of height of packing and Reynolds number.Profile of packing density in a spouted bed was also measured by using neutron radiography (film method). By analyzing the digitalized optical density of exposed film, the shape of spouted region was clearly recognized and it was also made clear that the lower part of the annular region was denser than the upper one.

利用中子照相技术(实时电视)对喷动床内固体颗粒的运动进行了可视化研究。结果表明，喷嘴平均速度归一化后的颗粒速度轨迹和径向分布几乎与填料高度和雷诺数无关。用中子照相法(胶片法)测量了喷动床内颗粒的密度分布。通过分析曝光胶片的数字化光密度，可以清楚地识别出喷射区的形状，并清楚地表明环状区域的下部比上部的密度要高。

项目成果

Fumimaru Ogino: "Visualization of Particle Motion in a Liquid Spouted Bed by Using Neutron Radiography" Chem. Eng. Japan.

Fumimaru Ogino：“使用中子射线照相术可视化液体喷动床中的粒子运动”Chem。