Research and Development of Highly Efficient Sequestration System of CO_2 at the Deep Ocean Using Large-Scale Structure of Turbulent Bubbly Flows

利用大尺度湍流气泡流结构的深海CO_2高效封存系统研究与开发

基本信息

批准号：
13355008
负责人：
SAITO Takayuki
金额：
$ 33.86万
依托单位：
Shizuoka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2003
项目状态：
已结题

项目摘要

On the basis of experimental and numerical approaches to elucidate large-scale structure and multi-scale structure of the turbulent bubbly flows in a large-diameter pipe, we have obtained the following results on the characteristics of large-scale GLAD System (Gas Lift Advanced Dissolution System for CO_2) as well as its environmental and cost performance:1)ExperimentsWe have elucidated the large-scale structure of the turbulent bubbly flows in a turbulence water vessel using PIV (Particle Image Velocimetry), LDA (Laser Doppler Anemometer) and 4-Tip Optical-fiber Probe newly developed by our research group as follows:a)The turbulent bubbly flows have the large-scale structure by superimpose the buoyancy flow induced by the bubble swarms onto the large-scale structure of the liquid-phase single phase flow.b)The coupling mechanism between the interface motion of a member bubble of the swarms and the motion of its surrounding liquid have been elucidated form a viewpoint of the local-scale … More structure.c)The coupling mechanism between mass transfer and the interface motion of a CO_2 bubble have been elucidated.2)ModelingWe have established a model of the bubble swarm motipn considered the large-scale structure of the turbulent bubbly flows:a)The region of a surrounding liquid flow induced, by the buoyancy of an individual single bubble is of about two times of the bubble diameter.b)The flow of the upper side of the bubble swarm is well approximated by the surrounding liquid flow induced by the buoyancy of an individual single bubble.c)Characteristic frequency components is caused mainly by the interface motion of the bubble and the center-of-gravity motion of the bubble.3)Numerical simulationWe have analyzed the large-scale structure of the turbulent bubbly flows using both DNS and LES methods. On the basis of the numerical analysis, we have grasped characteristics of the GLAD system using improved DEM.4)Prototype systemWe have developed prototype GLAD system of 149 mm in pipe diameter and 40 m in height. We have confirmed the system performance, environmental acceptability and the cost. Furthermore, we demonstrated its pumping performance using the 200-m scale test facility of the GLAD system. Less

根据实验和数值方法，以阐明大型气泡的大规模结构和多尺度结构在大直径管中流动，我们获得了以下结果，以下关于大型GLAD系统的特征（气体提升的高级溶解系统（co_2 for Co_2）的特征），以及大量的环境和成本效果：1）实验式的构成式的构成式的构成式的构成式的构成，构成了构成的构成，构成了构成的构成式的构成，使用PIV（粒子图像速度法），LDA（激光多普勒气体计）和4尖的光纤探测器新开发的探针的容器，如下：群体的成员气泡及其周围液体的运动已经被阐明了局部尺度的观点……更多的结构。c）c）质量转移与co_2的界面运动之间的耦合机制已阐明。2）模型我们已经建立了一个模型，该模型被认为是液体的液体结构的模型，该模型是一个较大的流动式圆满的圆满的气泡。单个单个气泡的气泡性大约是气泡直径的两次。b）气泡上侧的流动群的流动很近似于单个单个气泡的气泡引起的周围液体流动。使用DNS和LES方法泡泡流动。在数值分析的基础上，我们使用改进的DEM掌握了GLAD系统的特征。4）原型Systemwe已开发了原型Glad System在管道直径中为149毫米，高度为40 m，我们已经证实了系统的性能，环境的可接受性和成本。FURTHERMORE。我们证明了其使用200m Glad Scale System的泵送性能的性能。