The Use of PIV in Turbulent Boundary Layer Flows
The Use of PIV in Turbulent Boundary Layer Flows
复制标题
PIV 在湍流边界层流中的应用
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
B. Muhammad
中科院分区：
文献类型：
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作者：
K. Angele;B. Muhammad
由于最近的技术发展，数字PIV（粒子图像测速）已经成为一种广泛的整体流场测量工具。PIV通常作为同时测量和可视化技术在工业应用中使用，而基础研究仍然集中在调查这种技术的能力和局限性上，参见[1]。虽然数字技术在空间分辨率方面无法与摄影胶片竞争，但本研究表明，只要图像尺寸足够小，并且足够注意消除光学干扰，数字PIV也可以获得精确的近墙测量。这也是第一次用足够大的数据集在高雷诺数的边界层中进行piv测量，以形成统计上安全的平均值。
Due to the recent technical development, digital PIV (Particle Image Velocimetry) has become a widespread tool for overall flowfield measurements. PIV is often used in industrial applications as a simultaneous measurement and visualization technique, while basic research is still focussed on investigating the capabilities and limitations of the technique as such, see [1]. Although the digital technique can not compete with photographic film when it comes to spatial resolution, the present study shows that accurate near wall measurements can also be obtained with digital PIV, provided the image size is small enough and sufficient care is taken to eliminate optical disturbances. This is also the first time that PIV-measurements have been made in a boundary layer at high Reynolds numbers with a sufficiently large data set to form a statistically safe average.