| 流场实时测量中示踪球性能的研究 |
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| 引用本文： | 禹明忠,詹秀玲,庞东明,王兴奎. 流场实时测量中示踪球性能的研究[J]. 水利水电技术, 2002, 33(2): 43-45 |
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| 作者姓名： | 禹明忠 詹秀玲 庞东明 王兴奎 |
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| 作者单位： | 清华大学水沙科学教育部重点实验室,北京,100084 |
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| 基金项目： | 国家自然科学基金的资助项目(59890200). |
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| 摘 要： | 在基于颗粒示踪和图像处理方法的流场实时测量中，示踪颗粒的性能对流速测量的精度影响很大。为此，设计了一种半球形带沿的颗粒，其淹没深度较小，可以适用于较浅的水流条件，并通过试验研究了其分散性和跟随性。从试验结果可以看出，这种颗粒在运动过程中基本不会聚积成团，其运动速度达到稳定的时间和水流流速大致成对数曲线关系。示踪球的稳定速度和碎纸屑基本一样，可以认为这种颗粒能代表当地水流的运动速度。
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| 关 键 词： | 颗粒示踪 图像处理 流场测量 对数曲线 速度 碎纸屑 示踪球 河工试验 港工 模型试验 |
| 文章编号： | 1000-0860(2002)02-0043-03 |
| 修稿时间： | 2001-05-24 |
Research on the Properties of Particles in Real-time Velocity Field Measurement |
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| Yu Mingzhong,Zhan Xiuling,Pang Dongming,Wang Xingkui. Research on the Properties of Particles in Real-time Velocity Field Measurement[J]. Water Resources and Hydropower Engineering, 2002, 33(2): 43-45 |
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| Authors: | Yu Mingzhong Zhan Xiuling Pang Dongming Wang Xingkui |
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| Abstract: | The properties of the particle have a significant impact on the precision of velocity measured in real-time velocity field mea-surement with the Particle Tracking Velocimetry approach and Image Processing Technique.A semi-spheric particle with border is devel-oped.Because it has a small submersed depth,it can be used in shallow water.The properties of the particles are studied by experiments.The particles of this kind almost never aggregate to form masses,and the accelerating time conforms to the log law with the speed of the water.The speed of the paper slip and that of the particle after acceleration under the same water conditions are measured.As can be seen,the speed of the particle is almost the same as that of the paper slip.It can be assumed that the speed is a good representation of the speed of the water at the spot. |
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| Keywords: | PTV image processing technique velocity field measurement |
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