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仪器网/ 行业应用/ 解决方案/ 层析PIV(Tomographic PIV)和立体PIV(Stereo PIV)比较

层析PIV(Tomographic PIV)和立体PIV(Stereo PIV)比较

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Tomographic PIV as a full volume 3D-3C flow field measurement technique can also be applied
to thin sheets used in standard PIV. Tomographic PIV and Stereo PIV are compared with experimental data
from an impinging jet in water. The field of view is 60 mm x 40 mm, the light sheet thickness is varied from
8 to 55 pixel. Images have been recorded with 4 cameras to gain results from two independent Stereo PIV
systems and from Tomographic PIV using 2-4 cameras. Different error sources for both techniques are
quantified. It is shown that instantaneous flow fields from Tomographic PIV deviate less from each of the
two stereo systems, than the two stereo systems deviate from each other. A systematic error pattern is
identified for the two stereo systems, which is not present for Tomographic PIV. Thin volume Tomographic
PIV allows the calculation of multiple vector planes. Two planes can be calculated even for the thinnest light
sheet (8 pixel) providing the full 3x3 strain-tensor. Thicker sheets with up to twelve vector planes allow the
visualization of the small vortex structures in this experiment. 德国LaVision PIV/PLIF粒子成像测速场仪 体视层析粒子成像测速系统(Tomo-PIV) 三维立体PIV
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