FLOW VISUALIZATION OF SIMPLE PIPE AND CHANNEL FLOWS OBTAINED BY THE MRI TIME-SLIP METHOD"
FLOW VISUALIZATION OF SIMPLE PIPE AND CHANNEL FLOWS OBTAINED BY THE MRI TIME-SLIP METHOD"
复制标题
MRI时间滑移法获得的简单管道和通道流的流动可视化"
DOI：
10.1007/s12650-016-0395-1
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
Yusuke HASHIGUCHI and Tomoya NAGAHATA
中科院分区：
文献类型：
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作者：
Kazunori HOSOTANI;Atsushi ONO;Kazuhiro TAKEUCHI;Yusuke HASHIGUCHI and Tomoya NAGAHATA
其中，时间分辨磁共振成像作为一种无创医学诊断成像技术，被评价为一种直观理解流体机械的非接触测量工具。采用二维时间-空间标记反转脉冲（2D time-SLIP）方法对简单的管道流和通道流进行了研究，该方法可以跟踪标记的水块并利用二维图像将其可视化。本文描述了在直单管和双圆柱管（流体机械和热交换器中常见）中稳定和脉动管流的运动水质量。然后，对突然收缩和突然扩张通道进行了测试，并与粒子图像测速（PIV）测量结果或数值模拟结果进行了比较，以评估其有效性。此外，作为可行性试验，对旋转水轮和具有强旋流的流体二极管进行了测试，以评估该方法在流体机械上的适用性。结果表明，时间滑移法跟踪标记的水团是足够准确的，用于简单的流体机械在低雷诺数条件下。图形抽象
AbstractHerein, time-resolved magnetic resonance imaging, a noninvasive medical diagnostic imaging technique, was evaluated as a noncontact measurement tool for intuitively understanding fluid machineries. Simple pipe flows and channel flows are investigated by the 2D time–spatial labeling inversion pulse (2D time–SLIP) method, which can track a labeled water mass and visualize it using two-dimensional images. In this article, moving water masses of steady and pulsating pipe flows in a straight single pipe and a double cylindrical pipe (which are often seen in fluid machines and heat exchangers) are described. Then, abruptly contracting and expanding channels were tested and compared with particle image velocimetry (PIV) measurements or numerical simulations to evaluate their validity. In addition, as a feasibility test, a rotating water wheel and a fluidic diode with a strong swirling flow were tested to estimate this method’s applicability to fluid machines. The results suggest that the time-SLIP method of tracking a labeled water mass is sufficiently accurate for use in simple fluid machinery under low Re number conditions.Graphical abstract