Abstract
Stereoscopic particle image velocimetry (SPIV) is nowadays a well-established measurement
technique for turbulent flows. However, the accuracy and the spatial resolution are still highly
questionable in the presence of complex flow with both strong gradients and out-of-plane
motions. To give guidelines for both setup and measurements of such flow configurations, a
large region of overlap between two SPIV systems on the same laser light sheet is acquired in
a plane normal to the streamwise direction of a high Reynolds turbulent boundary layer flow.
A simple separation of the two light sheets is used to improve the accuracy of the
measurements by increasing the velocity dynamic range especially. It also presents the
enhancement of accuracy due to the light sheet separation for characterizing streamwise
vortices (i.e. perpendicular to the sheet). The proposed technique has been demonstrated in the
Laboratoire de Mecanique de Lille wind tunnel facility which has been specially designed to
study fully developed turbulent boundary layers at high Reynolds numbers. The outlook is to
study in detail the physics of the streamwise vortices generated from vortex generators taking
advantage of the large scales of this turbulent boundary layer.
Original language | English |
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Article number | 035304 |
Journal | Measurement Science and Technology |
Volume | 25 |
Issue number | 3 |
Number of pages | 10 |
ISSN | 0957-0233 |
DOIs | |
Publication status | Published - 2014 |
Keywords
- Stereoscopic PIV
- Accuracy
- Dynamic range