Numerical Simulation of Kerosene Dispersion Process by the Centrifugal Atomizer

The aim of this research is to carry a numerical investigation of the linear instability sheet atomization model (LISA) on the example of kerosene dispersion into the air by the centrifugal single-component atomizer under normal conditions. We applied Eulerian-Lagrangian approach for multiphase flow. First, we tested the influence of two model coefficients - sheet constant and ligament constant on the mean Sauter diameter of the spray. Then, we examined the influence of two turbulence models - k-epsilon realizable and k-epsilon standard as well as two assumptions of kerosene droplet drag modeling - spherical and dynamic on the mean Sauter diameter. For the simulations we used ANSYS FLUENT software. Next, we compared the calculation results with the experimental data derived by the method based on Mie theory. Moreover, we determined the influence of model parameters on the experimental data. The findings of the research show that the ligament factor is the only parameter which significantly influences Sauter mean diameter in the dispersion conditions under study. Additionally, we compared the results with the experimental data derived from the analysis of spray formation by various injectors under various flow regimes. Finally, we discussed the results obtained and gave future studies-oriented recommendations.

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