| Summary: | 碩士 === 國立中山大學 === 機械與機電工程學系研究所 === 100 === The aim of this study was to observe the properties of a spray field, with micro particle image velocimetry (μPIV) and holographic interferometric particle imaging (IPI) employed for the imaging and analysis of the global spray field. The experiment adopted different nozzle diameters (dj = 200 μm, and dj = 500 μm) and different values of gauge pressure (ΔP = 300 kPa, ΔP = 500 kPa, and ΔP = 700 kPa) as the main parameters, and DI (distilled) Water as the working medium. The study was divided into two parts. The first part used the μPIV system to observe the two-dimensional global visualization of spray field distribution and spray angle from each nozzle under different values of gauge pressure (ΔP). The flow velocity distribution and variations (axial velocity, and impact velocity) of the global spray frame were also measured. As the nozzle diameter would determine the distribution of spray droplets, the second part adopted the IPI system to measure and explore the atomized droplet sizes from each nozzle under different values of gauge pressure (ΔP), whereby drop size histograms were created through statistical analysis.
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