Numerical Simulation as a Tool for Design Optimization of Two-Phase Swirl Flow Atomizers

This study aims to analyze the hydrodynamics in two-phase swirl flow conical atomizers. The Euler-Euler model was used for the calculations. Numerical simulations were performed to provide information about the fluid velocity distribution and the atomizer’s internal flow. The numerical calculations confirmed the experimental data. This data was found based on the consistency of the spray angles obtained by both methods. Assuming the correctness of the numerical simulations performed, they can be treated as a tool for further analysis of mass and energy exchange along with the atomizer and optimizing the atomizer’s design depending on the requirements. The influence of the swirl chamber geometry on the obtained spraying effect was demonstrated. Increasing the swirl chamber’s height (increasing the HS/DS ratio) causes a decrease in the spray angle value. Moreover, the swirl chamber’s geometry influences the flow inside the atomizer, which determines the atomization effect.