High image-density particle image velocimetry using laser scanning techniques

High image-density particle image velocimetry using laser scanning techniques
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使用激光扫描技术的高图像密度粒子图像测速

DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
T. Corcoran
T. Corcoran
中科院分区：
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文献类型：
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作者：
D. Rockwell;C. Magness;J. Towfighi;O. Akin;T. Corcoran

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对应于激光束在感兴趣的场上的时间依赖性偏转的激光扫描可以提供小颗粒的相对高的照明强度，从而允许实现高图像密度的粒子图像测速（PIV）。扫描技术采用旋转（多面）镜，振荡镜，和声光偏转器的地址。照明强度和曝光，激光束的扫描速率，和扫描光束的回扫时间的问题进行了评估。描述了激光扫描PIV研究非定常分离流的代表性类别。
Laser scanning, corresponding to time-dependent deflections of laser beam across a field of interest, can provide relatively high illumination intensity of small particles, thereby allowing implementation of high image-density particle image velocimetry (PIV). Scanning techniques employing a rotating (multi-faceted) mirror, an oscillating mirror, and an acousto-optic deflector are addressed. Issues of illumination intensity and exposure, rate of scan of the laser beam, and retrace time of the scanning beam are assessed. Representative classes of unsteady separated flows investigated with laser-scanning PIV are described.