Abstract
A new measurement method of two-dimensional velocity vectors was developed using a high speed VTR and image processing system. The visualized turbulent flow with tracer is tracked by the high speed camera and the image data is sent to the image processor. The mean velocity vectors are automatically obtained by the cross-correlation calculation of tracer concentration signals between two points on the image. Applicability of the method was investigated in the velocity vectors measurements of an axisymmetric turbulent free jet and normal impingement of the jct. As a result, it was found that the measurement of higher velocity was possible by reducing data sampling interval Δt. And the measured velocity vectors of the impinging jet showed a good agreement with the other calculation and experimental results.
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