抄録
An experimental investigation of flow behind a backward facing step was made in the present study. Time-averaged flow patterns were measured by a pitot tube and a pulsed-wire anemometer, while time-dependent measurements were made by rotating straight and slanted hot-wires and a pulsed-wire. A data acquisition system including a traversing system of probes was used. The pulsed-wire was calibrated carefully prior to the measurements in order to minimize the influences of electrical noises. The present results thus obtained were compared with some criteria, which had been reported for flow behind a backward facing step, in order to check the accuracies of results.
After the above-mentioned examinations, the three-dimensional and time-dependent natures of flow near the time-averaged reattachment point was discussed by introducing two types of eddies generated in the shear layer.
