Abstract
A scanning stereo particle image velocimetry system was applied to measure the three-dimensional distribution of three-component velocity in an axisymmetric impinging jet. The jet formed by a round nozzle with an exit diameter of D=5 mm impinges vertically on the flat plate that was located at 45D from the nozzle. The jet Reynolds number was set at Re D ?? 1000 and a measurement region was set to contain the stagnation region. Appling Linear-Stochastic-Estimation to the measurement result, characteristic vortex structure in impinging region and time variations of that was estimated. It was confirmed that the structure was convected to streamwise direction with time passage through the vicinity of stagnation point, and was compressed axially and stretched to radial direction.
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