Abstract
X-ray Characterization of Internal and Near-nozzle Flow from a Standard Simplex Atomizer Spray
Highlights
Pressure-swirl atomizers are found across a wide range of applications where liquid dispersion and mixing with the surroundings is required
Two Research Simplex Atomizer injectors and the sprays they produced were studied with x-ray diagnostic methods at the Advanced Photon Source (APS) at Argonne National Laboratory
Internal Flow Each injector was operated with supply pressure of 690 kPa, and the SN005 injector was operated at 345 kPa for imaging of the internal flow
Summary
Pressure-swirl atomizers are found across a wide range of applications where liquid dispersion and mixing with the surroundings is required. Increasing flow requirements requires a disproportionate increase in supply pressure, and varying supply pressure can cause operation to switch between liquid breakup mechanisms Predicting this operational behavior requires accurate models when designing hardware for new applications. Experimental works have examined internal flows within general pressure-swirl atomizer geometries through the construction of transparent models [6, 7, 8]. These studies provide parametric understanding on the influence of operating condition to the internal flow and the external spray behavior. Combined with previously collected absorption measurements will yield a Sauter mean diameter (SMD) quantification in the sprays of interest
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