Abstract
In the present study, we measured velocity vector fields in a vertical section behind a swirl generator structure using an ultrasound particle image velocimetry (PIV) method. The ultrasound transducer was employed as an illumination beam source to have the advantages in measuring the vertical section of the flow wake in a circulating water channel. The frequencies of the ultrasonic imaging system were in the range of 35-50 MHz and the focal depth was 12 mm from a probe. The field of view was about 4 mm x 13.5 mm. We were able to observe the instantaneous wake flow structure using an ultrasound image by applying the PIV algorithm.
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