Searching for a Numerical Model for Prediction of Pressure-Swirl Atomizer Internal Flow

Numerical prediction of discharge parameters allows design a pressure-swirl atomizer in fast and cheap manner, yet it must provide reliable results for wide range geometries operating regimes. Many authors have used different numerical setups similar cases often concluded opposite suggestions on setup. This paper compares 2D (two-dimensional) axisymmetric, 3D (three-dimensional) periodic full models estimation the internal flow characteristics atomizer. The computed are compared with experimental data terms spray cone angle, coefficient (CD), air-core dimensions, velocity profiles. three-component was experimentally measured using Laser Doppler Anemometry scaled transparent model visualized by high-speed camera backlit illumination. Tested conditions covered Reynolds numbers within inlet ports, Re = 1000, 2000, 4000. treated as both steady transient flow. solver laminar several turbulence models, represented k-ε k-ω Stress (RSM) Large Eddy Simulation (LES). capable closely predicting CD, dimensions profiles simulations. LES performed similarly to low slightly superior two-equation were sensitive proper solving near wall not accurate Re. Surprisingly, RSM produced worst results.