Abstract
Velocity measurements in flow regions with high turbulent intensities can be performed with high accuracy by means of optical methods. Despite the validity ranges of these methods, great care must be used in taking measurements near solid walls, where high noise levels are present due to the scattering of the light on the wall, and in flows with high vorticity regions like the ones in the wake of a finite wing. In this paper, Laser Doppler Anemometry (LDA) and Particle Image Velocimetry (PIV) velocity measurement techniques are used in these two experimental situations and their results compared. This comparison shows that good measurements can be obtained from both techniques and that the resulting data sets do not provide alternative but rather complementary information.
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