Image processing of hydrogen bubble flow visualization for determination of turbulence statistics and bursting characteristics
Image processing of hydrogen bubble flow visualization for determination of turbulence statistics and bursting characteristics
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DOI：
10.1007/bf01830195
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发表时间：
1985-11
影响因子：
2.4
通讯作者：
L. J. Lu;C. Smith
中科院分区：
文献类型：
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作者：
L. J. Lu;C. Smith
描述了一种利用氢泡流动可视化图像的自动图像处理来建立局部瞬时速度分布信息的技术。氢泡流动可视化序列用高速视频系统记录下来，然后用VAX11/780计算机数字化、存储和评估。利用特殊的平滑和梯度检测算法，单个气泡线被计算机识别，这使得可以使用飞行时间技术来构建局部速度分布。该技术可用于1)确定作为位置和时间的函数的局部速度行为，2)评估时间平均湍流特性，以及3)将探针式湍流猝发检测技术与相应的可视化数据相关联。
A technique is described which employs automated image processing of hydrogen-bubble flow visualization pictures to establish local, instantaneous velocity profile information. Hydrogen bubble flow visualization sequences are recorded using a high-speed video system and then digitized, stored, and evaluated by a VAX 11/780 computer. Employing special smoothing and gradient detection algorithms, individual bubble-lines are computer identified, which allows local velocity profiles to be constructed using time-of-flight techniques. It is demonstrated how this techniques may be used to 1) determine local velocity behavior as a function of position and time, 2) evaluate time-averaged turbulence properties, and 3) correlate probe-type turbulent burst detection techniques with the corresponding visualization data.