Abstract
Novel experimental techniques for obtaining the particle spatial distribution and the velocity distribution across a micro-abrasive jet were presented and tested. The spatial distribution of particles within the jet was found by using a direct particle capture technique, and was found to depend on the nozzle diameter, following either a Weibull or a piecewise Weibull distribution. In general, the jet was found to be more focused when more particles were present across the nozzle opening. It was demonstrated how the measured particle spatial distribution could be used with a measurement of the eroded profile to extract an estimate of the non-dimensional particle velocity distribution within the jet. Using this technique, a linear or nonlinear velocity distribution was obtained, depending on the particle type and the nozzle diameter used. The results for the velocity distribution were compared to particle tracking velocimetry (PTV) results and were found to be within the acceptable measurement error ranges.
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