HIGH-FIDELITY NUMERICAL SIMULATION OF A PRESSURE SWIRL ATOMIZER

Lakshman Anumolu
Convergent Science
United States

Alireza Mashayekh
Convergent Science
United States

Priyesh Srivastava
Convergent Science
United States

Eric Pomraning
Convergent Science
United States

Millicent Coil
Convergent Science
United States

Shaoping Quan
Convergent Science
United States

Meizhong Dai
Convergent Science
United States

Sameera Wijeyakulasuriya
Convergent Science
United States

Kelly Senecal
Convergent Science
United States

Abstract:

Pressure swirl atomizers have many applications such as liquid fuel injection systems in aircraft, marine, and gas turbine combustors. The current study is focused on presenting the numerical simulation procedure and results of such atomizers, using implicit scheme available in the volume of fluid (VOF) multiphase models in commercially available software, CONVERGE CFD. The numerical predictions show good agreement with the experimental data available in published literature. Axial and tangential velocities, as well as spray cone angle, are used to validate the predictions. A separate VOF simulation of flash-boiling in a converging-diverging nozzle is presented to validate the VOF solver used in this analysis. These results are validated against measured vapor volume fraction and pressure data.