Flow Field Measurement by Stereo Patterns Particle Image Velocimetry (PIV)

PIV systems of DNW with a large field-of-view for the flow field around blade tip vortices and of DLR with small field-of-view for the vortex core flow field were employed, allowing the analysis of the vortex center position and its swirl velocity field. Vortex circulation and its core radius are further post-processing parameters.

Image: 1/2, Credit:

DNW

Vortices were measured on advancing and retreating side from their point of creation until leaving the rotor disk.
Image: 2/2, Credit:

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PIV Maps Data