PIV measurement of laminar boundary layer in a streamwise corner

Measurement of velocity profiles along a laminar boundary layer in a streamwise corner was carried out by using PIV in contrast to conventional hot-wire anemometry. To make the measurement successful, the laser light source for PIV was placed at a far downstream station and light sheet was emitted in parallel to the corner intersection line. The plate was tilted at a very small angle relative to the free-stream to realize laminar flow from the start of the corner. Based on the measured velocity profiles, effects of plate leading edge shape and angle of incidence of the corner plate were discussed. It was found that the velocity profiles measured correspond to the lower branch solution of the theoretical corner layer equations.

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